Re: ClusterCATS?

[Kym Kovan]

Hi Rick,

you wrote:

>So, should I entirely avoid ClusterCATS?
>  
>

The last time I used ClusterCats there were two sets of functionality, 
one aspect was load balancing where CC redirected to another server via 
a different URL and the second aspect was fail-over where a machine died 
entirely. In that case CC noticed the missing machine and directed 
another machine to pick up the dead machine's IP address and so take up 
the load. In the background there is a heartbeat connection between all 
CC connected machines so they all know what the others are up to and 
they have a sort-of communal intelligence.

I imagine the behaviour is still much the same at the base level for the 
latest versions of CF MX. I believe CC can now talk to Cisco Load 
Directors to direct traffic as well.

Kym k

>Rick Root wrote:
>  
>
>>Anyone out there using ClusterCATS for load-balancing/failover?  We have 
>>two licenses of CFMX Enterprise and we might go this route if it's reliable.
>>
>> From what I can tell, ClusterCATS will redirect requests from server A 
>>to server B using a different url...
>>
>>Ie, when someone types in "www.mysite.com", which is located on server 
>>A, and server A is busy it will redirect them to www2.mysite.com", which 
>>resides on Server B.  Is that right?
>>
>>But I can't tell what happens if server A is down... not just coldfusion 
>>but the whole box... since there's no intermediary, you dont' really get 
>>failover in that situation, do you?
>>
>>Thanks.
>>
>>Rick
>>
>>
>
>
>  
>

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Re: ClusterCATS?

[Rick Root]

So, should I entirely avoid ClusterCATS?

Rick Root wrote:
> Anyone out there using ClusterCATS for load-balancing/failover?  We have 
> two licenses of CFMX Enterprise and we might go this route if it's reliable.
> 
>  From what I can tell, ClusterCATS will redirect requests from server A 
> to server B using a different url...
> 
> Ie, when someone types in "www.mysite.com", which is located on server 
> A, and server A is busy it will redirect them to www2.mysite.com", which 
> resides on Server B.  Is that right?
> 
> But I can't tell what happens if server A is down... not just coldfusion 
> but the whole box... since there's no intermediary, you dont' really get 
> failover in that situation, do you?
> 
> Thanks.
> 
> Rick


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ClusterCATS?

[Rick Root]

Anyone out there using ClusterCATS for load-balancing/failover?  We have 
two licenses of CFMX Enterprise and we might go this route if it's reliable.

 From what I can tell, ClusterCATS will redirect requests from server A 
to server B using a different url...

Ie, when someone types in "www.mysite.com", which is located on server 
A, and server A is busy it will redirect them to www2.mysite.com", which 
resides on Server B.  Is that right?

But I can't tell what happens if server A is down... not just coldfusion 
but the whole box... since there's no intermediary, you dont' really get 
failover in that situation, do you?

Thanks.

Rick

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Here's one more, ClusterCats error

[Scott Stewart]

ClusterCATS Manager detected failure of probe Verity
(D:\CFusion\cfam\program/cfprobe.exe
http:///search97cgi/s97_cgi.exe?querytext=test&Action=Search&Re
sultTemplate=FIRSthome_nf.hts&collection=C5 "Query" NORESTART NOLOGGING) on
server GlobalProbe. Returned value 2; expected value 0. Server is, by admin
request, not restricted.

I think this is clustercats trying to replicate a verity collection or
template.. but there's nothing readily available from either MM or a google
search.

Sever is running CF 5.0..

Thanks

sas

Scott A. Stewart
Cold Fusion Developer

GNSI
11820 Parklawn Dr.
Rockville, MD


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RE: ClusterCats Monitoring

[Robertson-Ravo, Neil (RX)]

http://livedocs.macromedia.com/coldfusion/6/Using_ClusterCATS/config2.htm#11
17658



-Original Message-
From: Gavin Brook [mailto:[EMAIL PROTECTED] 
Sent: 23 November 2004 16:06
To: CF-Talk
Subject: ClusterCats Monitoring

Hi All,
 
  Does anyone here know if/the best way to monitor/control ClusterCats
systems? I'd like to be able to write a small CF app to monitor each server
in the cluster and control it. Any advice would be greatly appreciated.
 
Thanks,
 
Gavin




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ClusterCats Monitoring

[Gavin Brook]

Hi All,
 
  Does anyone here know if/the best way to monitor/control ClusterCats
systems? I'd like to be able to write a small CF app to monitor each server
in the cluster and control it. Any advice would be greatly appreciated.
 
Thanks,
 
Gavin


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Clustercats Vs Win2k Advanced Server

[admin]

Currently we have 3 production web servers all running CF5 (CFMX upgrade is not an option for us), different sites on each m/c. Each box services betwen 5 and 8 web sites. We don't run our own dns.  What we would like to do is have all the m/c's look the same,  and use either clustercats or win2k advanced server cluster services to be the front end.

Any recommendations ?

btw, I have no idea what I'm doing at the moment, just poking around in the dark! I will be given two m/c's to test on 

Cheers

Richard
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clustercats problem

[Critter]

oi CF-Talk,!!

We are trying to cluster two servers using CFMX Enterprise and
ClusterCats with WIN2K and IIS 5.   We are following the directions
outlined in the Using ClusterCats PDF from the Macromedia website.   The
problem we are having is with setting up the Dynamic IP addressing so
the servers will failover in case one goes down.   Below are the steps
we have taken:

 
1)   Each server was assigned a unique IP for the website and one
for the maintenance address.
2)   These IP's were added to the DNS Forward and Reverse lookup
tables, and were confirmed using NSLOOKUP.
3)   With all IP's bound to the NICs, ClusterCats was installed on
each server.
4)   A cluster was created using the Wizard, and no maintenance
address was specified per the instructions.   So far, so good.
5)   The website address was removed from each NIC, and each website
in IIS was checked to make sure the website IP was still bound to the
website.
6)   Each machine was rebooted.

 
After rebooting the servers, ClusterCats Explorer shows that the second
server (dev2) is unavailable even though the website and all required
services are running.   The IP for dev1, which shows as available in
Explorer, is being properly assigned as that server can be browsed.

 
We have tried several variants of the steps taken above, and each time
we find that the second server comes up not available.    If we run
ClusterCats Explorer/Cluster Wizard from dev2, the same thing happens
but in reverse (dev2 is available after reboot, but dev1 comes up as
unavailable.)

 
Any ideas would be greatly appreciated!

/crit

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RE: DNS Auto Failover (was: CFMX and ClusterCATS?)

[cf-talk]

It's a "poor man's" solution to fail over better than nothing... but
not my first choice for a high availability site.  You'll never achieve
99.99% uptime with it. :-)

 
-Novak

-Original Message-
From: Joshua Miller [mailto:[EMAIL PROTECTED] 
Sent: Friday, October 24, 2003 11:13 AM
To: CF-Talk
Subject: Re: DNS Auto Failover (was: CFMX and ClusterCATS?)

A, I see, ok that's a pretty good idea actually. Other than being
slightly slower than load balancing it's not a bad idea.

I can't imagine a server being down for 20 minutes though, my boss would
have shot me long before the DNS picked up for the other box.

On Fri, 2003-10-24 at 13:56, cf-talk wrote:
> Joshua,
> 
> 
> The client currently uses a company called TZO (http://www.tzo.com)
> 
> 
> In reality though if you have control over your own DNS you can do
> this
> pretty easily... all it really is is a fast refreshing DNS zone.  For
> example, if you set your zone records to expire every 20 min... you
> could easily write a .CFM script which could rewrite the DNS records
> and
> only include the records for the servers that are currently
> responding.
> 
> 
> -Novak
> 
> -Original Message-
> From: Joshua Miller [mailto:[EMAIL PROTECTED] 
> Sent: Friday, October 24, 2003 10:39 AM
> To: CF-Talk
> Subject: RE: CFMX and ClusterCATS?
> 
> I know it's not the best method as you said, but how are you doing the
> DNS failover? I'd be interested as we're trying to devise a long term
> plan for balancing two servers but right now they're in different
> physical locations and I need a quick, short-term solution.
> 
> Thanks
> 
> On Fri, 2003-10-24 at 13:21, cf-talk wrote:
> > Barney,
> > 
> > 
> > So did you purchase an piece of NLB hardware to run in front of your
> > boxes or are you using a Linux box to do that?  Perhaps you could
> > share
> > with all of us a few more details of your setup?
> > 
> > 
> > All I'm really after is the ability to set up four boxes... all
> > running
> > the exact same thing... and be able to kill any of those boxes at
> any
> > time without the end user being affected.  Cheap is nice... easy is
> > even
> > nicer...
> > 
> > 
> > The setup right now is DNS based failover but I'm not too impressed
> by
> > it.  Basically it's just rewriting DNS records to remove the "dead"
> > machine... but it can take several minutes for those DNS changes to
> > roll.  I want to provide something better than that.
> > 
> > 
> > Thanks,
> > -Novak
> > 
> > -Original Message-
> > From: Barney Boisvert [mailto:[EMAIL PROTECTED] 
> > Sent: Friday, October 24, 2003 10:13 AM
> > To: CF-Talk
> > Subject: RE: CFMX and ClusterCATS?
> > 
> > I just set up a clustered arrangement, but I'm on Linux, so I won't
> be
> > of
> > much assistance.  We didn't cluster the CF servers directly, but
> > rather
> > just
> > used a load balancer (actually a pair) in front to delegate each
> > request
> > to
> > one of the CF servers.  I'm not sure what clustering the CF servers
> > directly
> > brings to the table, rather than just using an external load
> balancer.
> > Perhaps easier administration (though I doubt that), and the savings
> > from
> > not having to buy another piece of hardware?  All the CF servers
> then
> > connect to a separate DB server, which also has a hot backup.
> > 
> > We can kill any machine in the rack and no one will know.  And
> adding
> > more
> > CF servers is just a matter of putting it in and running a single
> > script
> > on
> > the primary load balancer.  Very nice setup, I think.
> > 
> > cheers,
> > barneyb
> >   -Original Message-
> >   From: cf-talk [mailto:[EMAIL PROTECTED]
> >   Sent: Friday, October 24, 2003 9:53 AM
> >   To: CF-Talk
> >   Subject: CFMX and ClusterCATS?
> > 
> >   Hi All,
> > 
> >   Sorry for the repost... but I can't believe that nobody out there
> > has
> >   any info...
> > 
> >   Does anyone here have any experience with CFMX6.1 and clustering?
> > I'm
> >   looking to load balance two T1 connections across 2-4 CFMX boxes.
> > But
> >   before I go and recommend to my clients that this is the way to
> go,
> > I'd
> >   like to play around with it a little myself.
> > 
> >   The platform would be Windows 2000 or Windows 2003 and CFMX 6.1
> >   Enterprise. From what

Re: DNS Auto Failover (was: CFMX and ClusterCATS?)

[Joshua Miller]

A, I see, ok that's a pretty good idea actually. Other than being
slightly slower than load balancing it's not a bad idea.

I can't imagine a server being down for 20 minutes though, my boss would
have shot me long before the DNS picked up for the other box.

On Fri, 2003-10-24 at 13:56, cf-talk wrote:
> Joshua,
> 
> 
> The client currently uses a company called TZO (http://www.tzo.com)
> 
> 
> In reality though if you have control over your own DNS you can do
> this
> pretty easily... all it really is is a fast refreshing DNS zone.  For
> example, if you set your zone records to expire every 20 min... you
> could easily write a .CFM script which could rewrite the DNS records
> and
> only include the records for the servers that are currently
> responding.
> 
> 
> -Novak
> 
> -Original Message-
> From: Joshua Miller [mailto:[EMAIL PROTECTED] 
> Sent: Friday, October 24, 2003 10:39 AM
> To: CF-Talk
> Subject: RE: CFMX and ClusterCATS?
> 
> I know it's not the best method as you said, but how are you doing the
> DNS failover? I'd be interested as we're trying to devise a long term
> plan for balancing two servers but right now they're in different
> physical locations and I need a quick, short-term solution.
> 
> Thanks
> 
> On Fri, 2003-10-24 at 13:21, cf-talk wrote:
> > Barney,
> > 
> > 
> > So did you purchase an piece of NLB hardware to run in front of your
> > boxes or are you using a Linux box to do that?  Perhaps you could
> > share
> > with all of us a few more details of your setup?
> > 
> > 
> > All I'm really after is the ability to set up four boxes... all
> > running
> > the exact same thing... and be able to kill any of those boxes at
> any
> > time without the end user being affected.  Cheap is nice... easy is
> > even
> > nicer...
> > 
> > 
> > The setup right now is DNS based failover but I'm not too impressed
> by
> > it.  Basically it's just rewriting DNS records to remove the "dead"
> > machine... but it can take several minutes for those DNS changes to
> > roll.  I want to provide something better than that.
> > 
> > 
> > Thanks,
> > -Novak
> > 
> > -Original Message-
> > From: Barney Boisvert [mailto:[EMAIL PROTECTED] 
> > Sent: Friday, October 24, 2003 10:13 AM
> > To: CF-Talk
> > Subject: RE: CFMX and ClusterCATS?
> > 
> > I just set up a clustered arrangement, but I'm on Linux, so I won't
> be
> > of
> > much assistance.  We didn't cluster the CF servers directly, but
> > rather
> > just
> > used a load balancer (actually a pair) in front to delegate each
> > request
> > to
> > one of the CF servers.  I'm not sure what clustering the CF servers
> > directly
> > brings to the table, rather than just using an external load
> balancer.
> > Perhaps easier administration (though I doubt that), and the savings
> > from
> > not having to buy another piece of hardware?  All the CF servers
> then
> > connect to a separate DB server, which also has a hot backup.
> > 
> > We can kill any machine in the rack and no one will know.  And
> adding
> > more
> > CF servers is just a matter of putting it in and running a single
> > script
> > on
> > the primary load balancer.  Very nice setup, I think.
> > 
> > cheers,
> > barneyb
> >   -Original Message-
> >   From: cf-talk [mailto:[EMAIL PROTECTED]
> >   Sent: Friday, October 24, 2003 9:53 AM
> >   To: CF-Talk
> >   Subject: CFMX and ClusterCATS?
> > 
> >   Hi All,
> > 
> >   Sorry for the repost... but I can't believe that nobody out there
> > has
> >   any info...
> > 
> >   Does anyone here have any experience with CFMX6.1 and clustering?
> > I'm
> >   looking to load balance two T1 connections across 2-4 CFMX boxes.
> > But
> >   before I go and recommend to my clients that this is the way to
> go,
> > I'd
> >   like to play around with it a little myself.
> > 
> >   The platform would be Windows 2000 or Windows 2003 and CFMX 6.1
> >   Enterprise. From what I've read about ClusterCATS it's supposed to
> >   install with CFMX right? Is this also true for the trial download
> of
> >   CFMX (which is the Enterprise version)? I'd hate to have to
> purchase
> > a
> >   full blown enterprise version just to test this all out.
> > 
> >   As a side note... Windows 2003 has built in clustering which may
> or
> > may
> >   not do what I need. Basically what I'm looking for is network load
> >   balancing (NLB) across 2-4 machines. If one machine fails (for any
> >   reason) I want it to go unnoticed by the customer.
> > 
> >   Can someone out there point me in the right direction? I have
> > several
> >   boxes I can use to set this up and test with... Just need a push
> in
> > the
> >   right direction.
> > 
> >   -Novak
> > 
> >   _  
> > 
> > 
> > 
>   _  
> 
> 
> 
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RE: CFMX and ClusterCATS?

[Stacy Young]

Fail-over and load balancing are two different beasts in my mind. 

Currently we've got a load balancer (set to sticky sessions) in front of
an Apache cluster (2) which each have the JRun connector installed. Each
request is routed to a JRun instance in round-robin fashion (default).
While this works, I'd probably like to move towards adding a load
balancer in front of the Jrun cluster. We're using Alteon switches which
can monitor the actual 'health' of a server and route each request
accordingly. That would prob yield a more efficient distribution across
the cluster.

Guess there are many ways to skin a cat. ;-)

Stace

  _  

From: Matthew Fusfield [mailto:[EMAIL PROTECTED] 
Sent: October 24, 2003 1:34 PM
To: CF-Talk
Subject: RE: CFMX and ClusterCATS?

We played around with clustercats...it is on the CFMX CD (I think) and
there is a download on Macromedia's site where you can get it.

We tested in on Windows 2003 Web Edition without anything "in front".
Worked pretty well, if we killed one server, the other would take over
with very little loss of traffic. (I think it may have confused our
switch somewhat which might account for the delay)

Matt

-Original Message-
From: cf-talk [mailto:[EMAIL PROTECTED] 
Sent: Friday, October 24, 2003 12:53 PM
To: CF-Talk
Subject: CFMX and ClusterCATS?

Hi All,

Sorry for the repost... but I can't believe that nobody out
there has
any info...

Does anyone here have any experience with CFMX6.1 and
clustering? I'm
looking to load balance two T1 connections across 2-4 CFMX
boxes. But
before I go and recommend to my clients that this is the way to
go, I'd
like to play around with it a little myself.

The platform would be Windows 2000 or Windows 2003 and CFMX 6.1
Enterprise. From what I've read about ClusterCATS it's supposed
to
install with CFMX right? Is this also true for the trial
download of
CFMX (which is the Enterprise version)? I'd hate to have to
purchase a
full blown enterprise version just to test this all out.

As a side note... Windows 2003 has built in clustering which may
or may
not do what I need. Basically what I'm looking for is network
load
balancing (NLB) across 2-4 machines. If one machine fails (for
any
reason) I want it to go unnoticed by the customer.

Can someone out there point me in the right direction? I have
several
boxes I can use to set this up and test with... Just need a push
in the
right direction.

-Novak

  _  


  _  


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DNS Auto Failover (was: CFMX and ClusterCATS?)

[cf-talk]

Joshua,

 
The client currently uses a company called TZO (http://www.tzo.com)

 
In reality though if you have control over your own DNS you can do this
pretty easily... all it really is is a fast refreshing DNS zone.  For
example, if you set your zone records to expire every 20 min... you
could easily write a .CFM script which could rewrite the DNS records and
only include the records for the servers that are currently responding.

 
-Novak

-Original Message-
From: Joshua Miller [mailto:[EMAIL PROTECTED] 
Sent: Friday, October 24, 2003 10:39 AM
To: CF-Talk
Subject: RE: CFMX and ClusterCATS?

I know it's not the best method as you said, but how are you doing the
DNS failover? I'd be interested as we're trying to devise a long term
plan for balancing two servers but right now they're in different
physical locations and I need a quick, short-term solution.

Thanks

On Fri, 2003-10-24 at 13:21, cf-talk wrote:
> Barney,
> 
> 
> So did you purchase an piece of NLB hardware to run in front of your
> boxes or are you using a Linux box to do that?  Perhaps you could
> share
> with all of us a few more details of your setup?
> 
> 
> All I'm really after is the ability to set up four boxes... all
> running
> the exact same thing... and be able to kill any of those boxes at any
> time without the end user being affected.  Cheap is nice... easy is
> even
> nicer...
> 
> 
> The setup right now is DNS based failover but I'm not too impressed by
> it.  Basically it's just rewriting DNS records to remove the "dead"
> machine... but it can take several minutes for those DNS changes to
> roll.  I want to provide something better than that.
> 
> 
> Thanks,
> -Novak
> 
> -Original Message-
> From: Barney Boisvert [mailto:[EMAIL PROTECTED] 
> Sent: Friday, October 24, 2003 10:13 AM
> To: CF-Talk
> Subject: RE: CFMX and ClusterCATS?
> 
> I just set up a clustered arrangement, but I'm on Linux, so I won't be
> of
> much assistance.  We didn't cluster the CF servers directly, but
> rather
> just
> used a load balancer (actually a pair) in front to delegate each
> request
> to
> one of the CF servers.  I'm not sure what clustering the CF servers
> directly
> brings to the table, rather than just using an external load balancer.
> Perhaps easier administration (though I doubt that), and the savings
> from
> not having to buy another piece of hardware?  All the CF servers then
> connect to a separate DB server, which also has a hot backup.
> 
> We can kill any machine in the rack and no one will know.  And adding
> more
> CF servers is just a matter of putting it in and running a single
> script
> on
> the primary load balancer.  Very nice setup, I think.
> 
> cheers,
> barneyb
>   -Original Message-
>   From: cf-talk [mailto:[EMAIL PROTECTED]
>   Sent: Friday, October 24, 2003 9:53 AM
>   To: CF-Talk
>   Subject: CFMX and ClusterCATS?
> 
>   Hi All,
> 
>   Sorry for the repost... but I can't believe that nobody out there
> has
>   any info...
> 
>   Does anyone here have any experience with CFMX6.1 and clustering?
> I'm
>   looking to load balance two T1 connections across 2-4 CFMX boxes.
> But
>   before I go and recommend to my clients that this is the way to go,
> I'd
>   like to play around with it a little myself.
> 
>   The platform would be Windows 2000 or Windows 2003 and CFMX 6.1
>   Enterprise. From what I've read about ClusterCATS it's supposed to
>   install with CFMX right? Is this also true for the trial download of
>   CFMX (which is the Enterprise version)? I'd hate to have to purchase
> a
>   full blown enterprise version just to test this all out.
> 
>   As a side note... Windows 2003 has built in clustering which may or
> may
>   not do what I need. Basically what I'm looking for is network load
>   balancing (NLB) across 2-4 machines. If one machine fails (for any
>   reason) I want it to go unnoticed by the customer.
> 
>   Can someone out there point me in the right direction? I have
> several
>   boxes I can use to set this up and test with... Just need a push in
> the
>   right direction.
> 
>   -Novak
> 
>   _  
> 
> 
> 
  _  


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RE: CFMX and ClusterCATS?

[Barney Boisvert]

Here's a much more fleshed out description of the setup.

Everything's running Linux.  Right now we have 6 machines, two load
balancers, two web/CF servers, and two DB servers.  The DB servers also
handle uploaded files, as they need to be served from any of the web
servers.  Each web server has an NFS mount to the shared directory on the
active DB server.

There are two load balancers in front.  They are running ldirectord for the
balancing, and heartbeat for failover.  Behind them, on a private network,
are the Apache/CF servers, and behind them (on another, separate private
network) is the database server and it's replication slave.  The DB servers
are also running heartbeat and use a virtual IP address that the CF servers
connect to, so that IP can fail over to the slave server with no one
noticing.

The failover that heartbeat does is IP only, but it does a gratouitous arp
afterwards, which will make most machines (some windows machines don't
respond correctly) refresh their arp cache, making MAC failover unneeded.

Based on our trials, we'll be able to add at least 15-20 more Apache/CF
servers to the cluster before we have need for beefier DB or load balancing
servers.  Our application is VERY application-logic intensive (just the
nature of the beast), and we're running MySQL which is blazing, so I suspect
those numbers are skewed compared to the 'average' application.

There are three things that can go wrong, the primary loadbalancer fails, a
web server fails, or the master DB fails.  In the first case, the secondary
load balancer assumes the role, and the dead loadbalancer, once fixed, will
resume life as the secondary load balancer for use as needed.  That switch
happens almost instantaneously.  If a web server fails, it is removed from
the pool on the primary load balancer within 10 seconds or so, so no more
requests are routed to it until it is back up.  If the master DB fails, the
slave takes over immediately, and reloads the NFS mounts on the web servers.
However, because the replication is only one way, the master does NOT come
up as a secondary if it gets fixed.  It just stays dead until it can be
reconfigured as a slave for the new master.  That's a manual process at this
point, but such is life.

All the CF servers are totally independant of the others.  None of them know
the other's exist at the CF level.  Our application does caching for obvious
reasons, so there is some application-level syncronization that needs to
take place.  That's accomplished by CFHTTP calls across the private network
to flush caches.  The CF servers request a list of active servers from the
primary load balancer periodically so they know who to alert when they need
to do that.

We opted to not use session variables, instead using our own in-house
version of client variables stored in the DB, so there is no need for
persistant connections.  And we're using CF Standard, which saves us $3500 a
server.  We don't need any of the enterprise features, because we're
providing them ourselves with the setup.

cheers,
barneyb
  -Original Message-
  From: cf-talk [mailto:[EMAIL PROTECTED]
  Sent: Friday, October 24, 2003 10:22 AM
  To: CF-Talk
  Subject: RE: CFMX and ClusterCATS?

  Barney,

  So did you purchase an piece of NLB hardware to run in front of your
  boxes or are you using a Linux box to do that?  Perhaps you could share
  with all of us a few more details of your setup?

  All I'm really after is the ability to set up four boxes... all running
  the exact same thing... and be able to kill any of those boxes at any
  time without the end user being affected.  Cheap is nice... easy is even
  nicer...

  The setup right now is DNS based failover but I'm not too impressed by
  it.  Basically it's just rewriting DNS records to remove the "dead"
  machine... but it can take several minutes for those DNS changes to
  roll.  I want to provide something better than that.

  Thanks,
  -Novak

  -Original Message-
  From: Barney Boisvert [mailto:[EMAIL PROTECTED]
  Sent: Friday, October 24, 2003 10:13 AM
  To: CF-Talk
  Subject: RE: CFMX and ClusterCATS?

  I just set up a clustered arrangement, but I'm on Linux, so I won't be
  of
  much assistance.  We didn't cluster the CF servers directly, but rather
  just
  used a load balancer (actually a pair) in front to delegate each request
  to
  one of the CF servers.  I'm not sure what clustering the CF servers
  directly
  brings to the table, rather than just using an external load balancer.
  Perhaps easier administration (though I doubt that), and the savings
  from
  not having to buy another piece of hardware?  All the CF servers then
  connect to a separate DB server, which also has a hot backup.

  We can kill any machine in the rack and no one will know.  And adding
  more
  CF servers is just a matter of putting it in and running 

RE: CFMX and ClusterCATS?

[Joshua Miller]

I know it's not the best method as you said, but how are you doing the
DNS failover? I'd be interested as we're trying to devise a long term
plan for balancing two servers but right now they're in different
physical locations and I need a quick, short-term solution.

Thanks

On Fri, 2003-10-24 at 13:21, cf-talk wrote:
> Barney,
> 
> 
> So did you purchase an piece of NLB hardware to run in front of your
> boxes or are you using a Linux box to do that?  Perhaps you could
> share
> with all of us a few more details of your setup?
> 
> 
> All I'm really after is the ability to set up four boxes... all
> running
> the exact same thing... and be able to kill any of those boxes at any
> time without the end user being affected.  Cheap is nice... easy is
> even
> nicer...
> 
> 
> The setup right now is DNS based failover but I'm not too impressed by
> it.  Basically it's just rewriting DNS records to remove the "dead"
> machine... but it can take several minutes for those DNS changes to
> roll.  I want to provide something better than that.
> 
> 
> Thanks,
> -Novak
> 
> -Original Message-
> From: Barney Boisvert [mailto:[EMAIL PROTECTED] 
> Sent: Friday, October 24, 2003 10:13 AM
> To: CF-Talk
> Subject: RE: CFMX and ClusterCATS?
> 
> I just set up a clustered arrangement, but I'm on Linux, so I won't be
> of
> much assistance.  We didn't cluster the CF servers directly, but
> rather
> just
> used a load balancer (actually a pair) in front to delegate each
> request
> to
> one of the CF servers.  I'm not sure what clustering the CF servers
> directly
> brings to the table, rather than just using an external load balancer.
> Perhaps easier administration (though I doubt that), and the savings
> from
> not having to buy another piece of hardware?  All the CF servers then
> connect to a separate DB server, which also has a hot backup.
> 
> We can kill any machine in the rack and no one will know.  And adding
> more
> CF servers is just a matter of putting it in and running a single
> script
> on
> the primary load balancer.  Very nice setup, I think.
> 
> cheers,
> barneyb
>   -Original Message-
>   From: cf-talk [mailto:[EMAIL PROTECTED]
>   Sent: Friday, October 24, 2003 9:53 AM
>   To: CF-Talk
>   Subject: CFMX and ClusterCATS?
> 
>   Hi All,
> 
>   Sorry for the repost... but I can't believe that nobody out there
> has
>   any info...
> 
>   Does anyone here have any experience with CFMX6.1 and clustering?
> I'm
>   looking to load balance two T1 connections across 2-4 CFMX boxes.
> But
>   before I go and recommend to my clients that this is the way to go,
> I'd
>   like to play around with it a little myself.
> 
>   The platform would be Windows 2000 or Windows 2003 and CFMX 6.1
>   Enterprise. From what I've read about ClusterCATS it's supposed to
>   install with CFMX right? Is this also true for the trial download of
>   CFMX (which is the Enterprise version)? I'd hate to have to purchase
> a
>   full blown enterprise version just to test this all out.
> 
>   As a side note... Windows 2003 has built in clustering which may or
> may
>   not do what I need. Basically what I'm looking for is network load
>   balancing (NLB) across 2-4 machines. If one machine fails (for any
>   reason) I want it to go unnoticed by the customer.
> 
>   Can someone out there point me in the right direction? I have
> several
>   boxes I can use to set this up and test with... Just need a push in
> the
>   right direction.
> 
>   -Novak
> 
>   _  
> 
> 
> 
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RE: CFMX and ClusterCATS?

[Matthew Fusfield]

We played around with clustercats...it is on the CFMX CD (I think) and
there is a download on Macromedia's site where you can get it.

 
We tested in on Windows 2003 Web Edition without anything "in front".
Worked pretty well, if we killed one server, the other would take over
with very little loss of traffic. (I think it may have confused our
switch somewhat which might account for the delay)

 
Matt

	-Original Message-
	From: cf-talk [mailto:[EMAIL PROTECTED] 
	Sent: Friday, October 24, 2003 12:53 PM
	To: CF-Talk
	Subject: CFMX and ClusterCATS?
	
	
	Hi All,
	
	
	Sorry for the repost... but I can't believe that nobody out
there has
	any info...
	
	
	Does anyone here have any experience with CFMX6.1 and
clustering? I'm
	looking to load balance two T1 connections across 2-4 CFMX
boxes. But
	before I go and recommend to my clients that this is the way to
go, I'd
	like to play around with it a little myself.
	
	The platform would be Windows 2000 or Windows 2003 and CFMX 6.1
	Enterprise. From what I've read about ClusterCATS it's supposed
to
	install with CFMX right? Is this also true for the trial
download of
	CFMX (which is the Enterprise version)? I'd hate to have to
purchase a
	full blown enterprise version just to test this all out.
	
	As a side note... Windows 2003 has built in clustering which may
or may
	not do what I need. Basically what I'm looking for is network
load
	balancing (NLB) across 2-4 machines. If one machine fails (for
any
	reason) I want it to go unnoticed by the customer.
	
	Can someone out there point me in the right direction? I have
several
	boxes I can use to set this up and test with... Just need a push
in the
	right direction.
	
	-Novak
	
	
  _  

	
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RE: CFMX and ClusterCATS?

[cf-talk]

Barney,

 
So did you purchase an piece of NLB hardware to run in front of your
boxes or are you using a Linux box to do that?  Perhaps you could share
with all of us a few more details of your setup?

 
All I'm really after is the ability to set up four boxes... all running
the exact same thing... and be able to kill any of those boxes at any
time without the end user being affected.  Cheap is nice... easy is even
nicer...

 
The setup right now is DNS based failover but I'm not too impressed by
it.  Basically it's just rewriting DNS records to remove the "dead"
machine... but it can take several minutes for those DNS changes to
roll.  I want to provide something better than that.

 
Thanks,
-Novak

-Original Message-
From: Barney Boisvert [mailto:[EMAIL PROTECTED] 
Sent: Friday, October 24, 2003 10:13 AM
To: CF-Talk
Subject: RE: CFMX and ClusterCATS?

I just set up a clustered arrangement, but I'm on Linux, so I won't be
of
much assistance.  We didn't cluster the CF servers directly, but rather
just
used a load balancer (actually a pair) in front to delegate each request
to
one of the CF servers.  I'm not sure what clustering the CF servers
directly
brings to the table, rather than just using an external load balancer.
Perhaps easier administration (though I doubt that), and the savings
from
not having to buy another piece of hardware?  All the CF servers then
connect to a separate DB server, which also has a hot backup.

We can kill any machine in the rack and no one will know.  And adding
more
CF servers is just a matter of putting it in and running a single script
on
the primary load balancer.  Very nice setup, I think.

cheers,
barneyb
  -Original Message-
  From: cf-talk [mailto:[EMAIL PROTECTED]
  Sent: Friday, October 24, 2003 9:53 AM
  To: CF-Talk
  Subject: CFMX and ClusterCATS?

  Hi All,

  Sorry for the repost... but I can't believe that nobody out there has
  any info...

  Does anyone here have any experience with CFMX6.1 and clustering? I'm
  looking to load balance two T1 connections across 2-4 CFMX boxes. But
  before I go and recommend to my clients that this is the way to go,
I'd
  like to play around with it a little myself.

  The platform would be Windows 2000 or Windows 2003 and CFMX 6.1
  Enterprise. From what I've read about ClusterCATS it's supposed to
  install with CFMX right? Is this also true for the trial download of
  CFMX (which is the Enterprise version)? I'd hate to have to purchase a
  full blown enterprise version just to test this all out.

  As a side note... Windows 2003 has built in clustering which may or
may
  not do what I need. Basically what I'm looking for is network load
  balancing (NLB) across 2-4 machines. If one machine fails (for any
  reason) I want it to go unnoticed by the customer.

  Can someone out there point me in the right direction? I have several
  boxes I can use to set this up and test with... Just need a push in
the
  right direction.

  -Novak

  _  


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RE: CFMX and ClusterCATS?

[Barney Boisvert]

I just set up a clustered arrangement, but I'm on Linux, so I won't be of
much assistance.  We didn't cluster the CF servers directly, but rather just
used a load balancer (actually a pair) in front to delegate each request to
one of the CF servers.  I'm not sure what clustering the CF servers directly
brings to the table, rather than just using an external load balancer.
Perhaps easier administration (though I doubt that), and the savings from
not having to buy another piece of hardware?  All the CF servers then
connect to a separate DB server, which also has a hot backup.

We can kill any machine in the rack and no one will know.  And adding more
CF servers is just a matter of putting it in and running a single script on
the primary load balancer.  Very nice setup, I think.

cheers,
barneyb
  -Original Message-
  From: cf-talk [mailto:[EMAIL PROTECTED]
  Sent: Friday, October 24, 2003 9:53 AM
  To: CF-Talk
  Subject: CFMX and ClusterCATS?

  Hi All,

  Sorry for the repost... but I can't believe that nobody out there has
  any info...

  Does anyone here have any experience with CFMX6.1 and clustering? I'm
  looking to load balance two T1 connections across 2-4 CFMX boxes. But
  before I go and recommend to my clients that this is the way to go, I'd
  like to play around with it a little myself.

  The platform would be Windows 2000 or Windows 2003 and CFMX 6.1
  Enterprise. From what I've read about ClusterCATS it's supposed to
  install with CFMX right? Is this also true for the trial download of
  CFMX (which is the Enterprise version)? I'd hate to have to purchase a
  full blown enterprise version just to test this all out.

  As a side note... Windows 2003 has built in clustering which may or may
  not do what I need. Basically what I'm looking for is network load
  balancing (NLB) across 2-4 machines. If one machine fails (for any
  reason) I want it to go unnoticed by the customer.

  Can someone out there point me in the right direction? I have several
  boxes I can use to set this up and test with... Just need a push in the
  right direction.

  -Novak


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CFMX and ClusterCATS?

[cf-talk]

Hi All,

 
Sorry for the repost... but I can't believe that nobody out there has
any info...

 
Does anyone here have any experience with CFMX6.1 and clustering? I'm
looking to load balance two T1 connections across 2-4 CFMX boxes. But
before I go and recommend to my clients that this is the way to go, I'd
like to play around with it a little myself.

The platform would be Windows 2000 or Windows 2003 and CFMX 6.1
Enterprise. From what I've read about ClusterCATS it's supposed to
install with CFMX right? Is this also true for the trial download of
CFMX (which is the Enterprise version)? I'd hate to have to purchase a
full blown enterprise version just to test this all out.

As a side note... Windows 2003 has built in clustering which may or may
not do what I need. Basically what I'm looking for is network load
balancing (NLB) across 2-4 machines. If one machine fails (for any
reason) I want it to go unnoticed by the customer.

Can someone out there point me in the right direction? I have several
boxes I can use to set this up and test with... Just need a push in the
right direction.

-Novak


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RE: Clustercats and Apache 2?

[Jeremy Bruck]

Howard,

We use Nortel's Alteon load balancer.  You can actually get one one the used
market for about $1000 to $2500 depending on the model.  It works great we
have had no problems.  Our next thing redundancy issue is use 2 instances on
each box in addition to the Alteon hardware load balancer to be fully
redundant.

Yes, we are on Apache 2 as well.

Jeremy
  -Original Message-
  From: Howard Fore [mailto:[EMAIL PROTECTED]
  Sent: Tuesday, October 07, 2003 11:07 AM
  To: CF-Talk
  Subject: Re: Clustercats and Apache 2?

  FYI,

  I've been told that MM answered a tech support request and said that
  ClusterCats will not be ported to support Apache 2, and are
  recommending a hardware solution. We're looking at Cisco's
  LocalDirector line. Any other vendor suggestions?

  On Tuesday, Oct 7, 2003, at 08:08 US/Eastern, Howard Fore wrote:

  > Hi,
  >
  > Has anyone had success in running ClusterCats with Apache 2? My IT guys
  > at work are trying to bring up a testing cluster using CFMX 6.1, JRun 4
  > Updater 2, and Apache 2.0.46 (I think) on beta 2 of Red Hat Enterprise
  > Linux 3 AS. They're hitting an error along the way and have narrowed it
  > down to a variable APACHE_DUMMY_MUTEX (again, I think) that is in
  > Apache 1.3.x and doesn't exist in Apache 2.0.x (that they can find).
  >
  > Any ideas or suggestions?

  --
  Howard Fore, [EMAIL PROTECTED]
  "I hope you believe you understand what you think I said, but I'm not
  sure you understand that what you've heard is not what I meant."
  President Richard Nixon


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Re: Clustercats and Apache 2?

[Howard Fore]

FYI,

I've been told that MM answered a tech support request and said that 
ClusterCats will not be ported to support Apache 2, and are 
recommending a hardware solution. We're looking at Cisco's 
LocalDirector line. Any other vendor suggestions?

On Tuesday, Oct 7, 2003, at 08:08 US/Eastern, Howard Fore wrote:

> Hi,
>
> Has anyone had success in running ClusterCats with Apache 2? My IT guys
> at work are trying to bring up a testing cluster using CFMX 6.1, JRun 4
> Updater 2, and Apache 2.0.46 (I think) on beta 2 of Red Hat Enterprise
> Linux 3 AS. They're hitting an error along the way and have narrowed it
> down to a variable APACHE_DUMMY_MUTEX (again, I think) that is in
> Apache 1.3.x and doesn't exist in Apache 2.0.x (that they can find).
>
> Any ideas or suggestions?

--
Howard Fore, [EMAIL PROTECTED]
"I hope you believe you understand what you think I said, but I'm not 
sure you understand that what you've heard is not what I meant." 
President Richard Nixon

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Fwd: Clustercats and Apache 2?

[Howard Fore]

Hi,

Has anyone had success in running ClusterCats with Apache 2? My IT guys 
at work are trying to bring up a testing cluster using CFMX 6.1, JRun 4 
Updater 2, and Apache 2.0.46 (I think) on beta 2 of Red Hat Enterprise 
Linux 3 AS. They're hitting an error along the way and have narrowed it 
down to a variable APACHE_DUMMY_MUTEX (again, I think) that is in 
Apache 1.3.x and doesn't exist in Apache 2.0.x (that they can find).

Any ideas or suggestions?

--
Howard Fore, [EMAIL PROTECTED]
"If everything's coming your way, you may be in the wrong lane" - Old 
Farmhand, Prairie Home Companion

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RE: ClusterCats 5.0 -- Probes are successful, yet there are issues.

[Mike Brunt]

Vinny, we have an article in our blog that shows advanced troubleshooting techniques 
for Clustercats on Win 2K, it might help you.

http://www.webapper.net/index.cfm?fuseaction=Fuseblog.ShowComments&ArticleID=20030923064141

Kind Regards - Mike Brunt

Original Message ---
Hi all,

I'm posting this message in cf-talk (as opposed to cf-server) in hopes that this list 
(which has more traffic) can help me find an answer.  Apologies for the inconvenience.

I'm running CF5/Win2K/IIS5.  I have ClusterCats set up for three servers in our 
environment.  I've set up a probe for one of these servers.  Here's the situation.

The probe searches for the http:///btauxdir/cfprobe.cfm file and looks 
for the string "hello".  When I set the server in the cluster to "passive mode", I can 
hit the page without any issues.  However, when I set the server back to active mode, 
the load (in the load monitor) immediately spikes to 100%, and the server becomes 
unavailable.  Yet when I check the CFAM aProbe.log logfile, I see the following 
message:

[23-Sep-2003 12:02:22.875 +04:00:00.000 axp-ny-websrv05 954:9E4] => Entered 
d:\cfusion\cfam\program\cfprobe.exe 
[23-Sep-2003 12:02:22.875 +04:00:00.000 axp-ny-websrv05 954:9E4] => sProcName 
d:\cfusion\cfam\program\cfprobe.exe, sRestart norestart, sLogEnable log [23-Sep-2003 
12:02:23.375 +04:00:00.000 axp-ny-websrv05 954:9E4] => ProcessUrl: HTTP Status: 200 
[23-Sep-2003 12:02:23.375 +04:00:00.000 axp-ny-websrv05 954:9E4] => ProcessURL: URL 
Content [23-Sep-2003 12:02:23.375 +04:00:00.000 axp-ny-websrv05 954:9E4] => 
ProcessUrl: Match Found For Hello 
[23-Sep-2003 12:02:23.375 +04:00:00.000 axp-ny-websrv05 954:9E4] => ProcessUrl: Return 
Status: 0 
[23-Sep-2003 12:02:23.375 +04:00:00.000 axp-ny-websrv05 954:9E4] => Exiting 
d:\cfusion\cfam\program\cfprobe.exe with status=0 

According to that return status, I was given a zero, which means that the probe should 
have been successful.  The server continues to be unavailable.

Can anyone shed some insight as to why this might be happening, and if there are any 
solutions?

Thanks,
-Vinny

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ClusterCats 5.0 -- Probes are successful, yet there are issues.

[vinnyd]

Hi all,

I'm posting this message in cf-talk (as opposed to cf-server) in hopes that this list 
(which has more traffic) can help me find an answer.  Apologies for the inconvenience.

I'm running CF5/Win2K/IIS5.  I have ClusterCats set up for three servers in our 
environment.  I've set up a probe for one of these servers.  Here's the situation.

The probe searches for the http:///btauxdir/cfprobe.cfm file and looks 
for the string "hello".  When I set the server in the cluster to "passive mode", I can 
hit the page without any issues.  However, when I set the server back to active mode, 
the load (in the load monitor) immediately spikes to 100%, and the server becomes 
unavailable.  Yet when I check the CFAM aProbe.log logfile, I see the following 
message:

[23-Sep-2003 12:02:22.875 +04:00:00.000 axp-ny-websrv05 954:9E4] => Entered 
d:\cfusion\cfam\program\cfprobe.exe 
[23-Sep-2003 12:02:22.875 +04:00:00.000 axp-ny-websrv05 954:9E4] => sProcName 
d:\cfusion\cfam\program\cfprobe.exe, sRestart norestart, sLogEnable log [23-Sep-2003 
12:02:23.375 +04:00:00.000 axp-ny-websrv05 954:9E4] => ProcessUrl: HTTP Status: 200 
[23-Sep-2003 12:02:23.375 +04:00:00.000 axp-ny-websrv05 954:9E4] => ProcessURL: URL 
Content [23-Sep-2003 12:02:23.375 +04:00:00.000 axp-ny-websrv05 954:9E4] => 
ProcessUrl: Match Found For Hello 
[23-Sep-2003 12:02:23.375 +04:00:00.000 axp-ny-websrv05 954:9E4] => ProcessUrl: Return 
Status: 0 
[23-Sep-2003 12:02:23.375 +04:00:00.000 axp-ny-websrv05 954:9E4] => Exiting 
d:\cfusion\cfam\program\cfprobe.exe with status=0 

According to that return status, I was given a zero, which means that the probe should 
have been successful.  The server continues to be unavailable.

Can anyone shed some insight as to why this might be happening, and if there are any 
solutions?

Thanks,
-Vinny
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Cannot Uninstall ClusterCats

[Joe Eugene]

I installed ClusterCats a while ago and had to Uninstall it but for some
reason, the uninstall didnt work properly and i tried to delete registry
key..didnt work.

Machine OS - Win2k SP3.
ClusterCats Version : ClusterCats for CFMX

Keep getting this error on server boot.
"
The HTTP Filter DLL E:\Program
Files\Macromedia\ClusterCATS\Program\teserver.dll failed to load.  The data
is the error. For additional information specific to this message please
visit the Microsoft Online Support site located at: 
"

Does anyone know how to resolve the issue?

Appreciate any help.

Thanks,
Joe Eugene


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Re: ClusterCats server name issue

[Bill Wheatley]

I found it automatically goes to that when the server in charge is
unavailable so it has to boot you to another box so it actually shows you
the URL of the box you are on. Its unavoidable i think unless possibly you
keep your CLuster cats control server out of the loop and just let it manage
the cluster but thats impractical for most of us

Bill Wheatley
Senior Database Developer
Macromedia Certified Advanced Coldfusion Developer
EDIETS.COM
954.360.9022 X159
ICQ 417645
- Original Message -
From: "Matt Kornguth" <[EMAIL PROTECTED]>
To: "CF-Talk" <[EMAIL PROTECTED]>
Sent: Thursday, August 01, 2002 1:04 PM
Subject: ClusterCats server name issue


> In attempting to go to http://www.foo.com, ClusterCats seems to be working
properly, however the URL that appears in the browser's address line is
either http://www1.foo.com or http://www2.foo.com.
>
> Anyone know if there is a way to suppress the numeric server identifier?
Documentation is ... well ... inadequate.
>
> Thanks in advance,
> Matt
>
> 
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ClusterCats server name issue

[Matt Kornguth]

In attempting to go to http://www.foo.com, ClusterCats seems to be working properly, 
however the URL that appears in the browser's address line is either 
http://www1.foo.com or http://www2.foo.com.

Anyone know if there is a way to suppress the numeric server identifier? Documentation 
is ... well ... inadequate.

Thanks in advance,
Matt

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clustercats problem?

[Dan Haley]

We're on CF4.5.1 SP2 Enterprise, on two Win2K servers, using ClusterCats for
load balancing.  On one server mostly, and sometimes the other, we are
seeing entries from wsprobe in the Application Event log where it is
restarting IIS.  The intervals between restarts can be pretty random, but
when it does it is often at 4:00AM. It has done it other times during the
day, and if it weren't for the recurring 4:00 AM theme I'd think it was
runaway processes, but looking at the CF and IIS logs, there isn't much load
on the server when it is happening.  There is very little information about
wsprobe available on Macromedia KB or on the web in general.  Anyone have
any ideas?

Thanks folks,
Dan
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ClusterCats, Verity, Cluster Questions

[chris.alvarado]

Here is the scenario.

We have decided to cluster our server environment to improve performance as
well as add more fail over assurance.

Environment:

4 Identical servers.
1 File Server (where all of the files will reside)

>From what I have gathered about Cluster Cats, it requires that your firewall
see it as "1 server (1 IP address)" thus allowing Cluster cats to route the
traffic to the appropriate server.
There is good documentation on how to do this, and it seems fairly simple,
using Cisco Local Director. However, we do not use Local Director. We have a
Netscreen firewall and will be bale to do whatever DNS stuff is necessary.
Can anyone advise on how to satisfy Cluster Cat's needs in this environment?

Also,

seeing as how we will have 4 servers (initially) that will be serving as the
web server, how do we enable verity to work identically across all of the
servers? Will we need to duplicate the collections?

the reason we chose to go with a central NFS as opposed to storing all of
the application's files on each server is to eliminate the need to duplicate
files across server, etc.

if you need any more details please to not hesitate to ask.

as always,

any and all help is greatly appreciated.



-chris.alvarado
[application.developer]
4 Guys Interactive, Inc.

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ClusterCats

[dave fauth]

If anyone is doing ClusterCats, I have a configuration question that I 
can't figure out.  I have the IP/DNS information correct and the clustering 
works correctly but my NT event logs are filling up with cluster errors 
every 30 seconds.

Twice a minute I get an event log telling me this:

Cluster (clustername) SERVER FAILURE: Server (server.domain.name) NOT AVAILABLE

Checking the explorer, everything is fine. Load on the server is within 
acceptable limits. The server's performance is fine through my browser. The 
explorer displays no errors, but still I get the event log twice a 
minute.  It happens on both servers.

The machines are NT4sp6 with CF5.0

You can contact me off line if you prefer.

thanks
dave
---
dave fauth
[EMAIL PROTECTED]

"The opinions expressed here
are my own and not those of
DOMAIN technologies, inc."

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Clustercats custom errors

[John Wilker]

Hey all, has anyone ever set up a custom 503 error in cluster cats on CF
5?
 
We want a custom page to display for that period where one server has
not fully bounced over to the other server and the "Name" is not a part
of cluster type message is displayed. We found a tech note mentioning a
reg key to mod and it doesn't seem to do anything. I was wondering if
anyone had a real world, "this is what I did..." example.
 
Thanks all,
 
J.
 
John Wilker
Web Applications Consultant, and Author
Macromedia Certified ColdFusion Developer
President/Founder, Inland Empire CFUG.
www.red-omega.com  
 
"more people are killed by donkeys than by airplane crashes each year"
 

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Re: ClusterCATS and "stickiness

[Dave Carabetta]

>My company is getting ready to move to a clustered environment. We 
>currently use session variables for our shopping cart.
>
>I keep seeing posts about needing to convert to client variables for load 
>balancing, despite the fact that the CF5 Advanced  CF Administration manual 
>(chp 12, Configuring ColdFusion Clusters) states:
>
>"To ensure that users are not redirected from the server on which they 
>start their session, ClusterCATS provides a built-in feature for enabling 
>session-aware load balancing."
>
>So ... I'm getting nervous here. Does anyone have experience with 
>session-aware load balancing in ClusterCATS? Is there some reason that 
>everyone is recommending client variables?
>

I think that people are recommending client variables because sticky 
sessions have some limitations if you're aiming for a true load-balanced 
environment.

Sticky sessions work by pinning a user to one server throughout their 
session. That's fine if you don't have templates that perform rigorous 
routines on your site. But if you do, problems can arise.

If one user comes and starts hogging a lot of resources on one server and is 
using sesson variables, subsequent requests will be re-directed to another 
server. But since they are now tied to a server because of sticky-sessions, 
you now have several people on one machine and one on the other for the 
remainder or each of their sessions. True balance can't be maintained. What 
would have if some of those subsequent users started running their own 
complex templates? You'd now have one server getting pummeled and the other 
just sitting there (relatively speaking).

Client variables offer you the ability to not have to worry about this 
scenario. Simply store the variables in a shared datasource and you don't 
have to worry about pinning a user to one machine. If you have complex 
structures to store, use WDDX to store them in the client store. It's super 
quick and not hard to implement.

I hope this makes a bit of sense, as the visualization can be hard to 
communicate over e-mail!

Hope this helps,
Dave.

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RE: ClusterCATS and "stickiness

[Dowdell, Jason G]

Two items to note here:

1.  As I can recall, Dave Watts is somewhat of an expert 
on cluster Cats so I would like to see his input on
this.

2.  One item to note with session vars in a clustered env
is that if the server goes down that the user was
attached to, then all of their data is lost.  This
is a very good argument (IMHO) for using client vars
in clusters.  Then the user's "session" will continue
even if the server they came in on crashes.



-Original Message-
From: Matthew R. Small [mailto:[EMAIL PROTECTED]]
Sent: Friday, March 15, 2002 2:39 PM
To: CF-Talk
Subject: RE: ClusterCATS and "stickiness


As I understand it, clustercats will loadbalance an initial request to a
server with the best response time.  Every request after that from the
same session will then be re-directed to the same server.  This is
"sticky sessions" and will(should) enable you to keep using session
variables.  If you weren't using sticky sessions, the server that
processes the request from the client would probably change for every
request. In that case, I imagine the best thing to do would be convert
all session vars to client so they be returned to the server for proper
processing.

- Matt Small

-Original Message-
From: Matt Kornguth [mailto:[EMAIL PROTECTED]] 
Sent: Friday, March 15, 2002 2:20 PM
To: CF-Talk
Subject: ClusterCATS and "stickiness

My company is getting ready to move to a clustered environment. We
currently use session variables for our shopping cart. 

I keep seeing posts about needing to convert to client variables for
load balancing, despite the fact that the CF5 Advanced  CF
Administration manual (chp 12, Configuring ColdFusion Clusters) states:

"To ensure that users are not redirected from the server on which they
start their session, ClusterCATS provides a built-in feature for
enabling session-aware load balancing."

So ... I'm getting nervous here. Does anyone have experience with
session-aware load balancing in ClusterCATS? Is there some reason that
everyone is recommending client variables?

Thanks in advance,
Matt Kornguth
Web Applications Developer
BLR.com



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RE: ClusterCATS and "stickiness

[Matthew R. Small]

As I understand it, clustercats will loadbalance an initial request to a
server with the best response time.  Every request after that from the
same session will then be re-directed to the same server.  This is
"sticky sessions" and will(should) enable you to keep using session
variables.  If you weren't using sticky sessions, the server that
processes the request from the client would probably change for every
request. In that case, I imagine the best thing to do would be convert
all session vars to client so they be returned to the server for proper
processing.

- Matt Small

-Original Message-
From: Matt Kornguth [mailto:[EMAIL PROTECTED]] 
Sent: Friday, March 15, 2002 2:20 PM
To: CF-Talk
Subject: ClusterCATS and "stickiness

My company is getting ready to move to a clustered environment. We
currently use session variables for our shopping cart. 

I keep seeing posts about needing to convert to client variables for
load balancing, despite the fact that the CF5 Advanced  CF
Administration manual (chp 12, Configuring ColdFusion Clusters) states:

"To ensure that users are not redirected from the server on which they
start their session, ClusterCATS provides a built-in feature for
enabling session-aware load balancing."

So ... I'm getting nervous here. Does anyone have experience with
session-aware load balancing in ClusterCATS? Is there some reason that
everyone is recommending client variables?

Thanks in advance,
Matt Kornguth
Web Applications Developer
BLR.com


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ClusterCATS and "stickiness

[Matt Kornguth]

My company is getting ready to move to a clustered environment. We currently use 
session variables for our shopping cart. 

I keep seeing posts about needing to convert to client variables for load balancing, 
despite the fact that the CF5 Advanced  CF Administration manual (chp 12, Configuring 
ColdFusion Clusters) states:

"To ensure that users are not redirected from the server on which they start their 
session, ClusterCATS provides a built-in feature for enabling session-aware load 
balancing."

So ... I'm getting nervous here. Does anyone have experience with session-aware load 
balancing in ClusterCATS? Is there some reason that everyone is recommending client 
variables?

Thanks in advance,
Matt Kornguth
Web Applications Developer
BLR.com

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RE: Trouble with ClusterCats

[Trey Rouse]

Yeah, the more I dug into this I realized this is how clustercats was
monitoring the load state of each machine in  the cluster... I verified that
/btauxdir/cfprobe.cfm was public viewable over http://.

I went ahead and took a look at the log files for each web server and I can
see where ever 60 seconds or so a hit is made to cfprobe.cfm with a browser
agent of Allaire+ClusterCATS+probe.  I can even see my own hits to the page
as well hitting inbetween clusterCATS polling the state.  Unfortunatly there
is no apparent error happening. =(

Anyone else have any ideas?

Trey

-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Thursday, September 13, 2001 7:18 AM
To: CF-Talk
Subject: RE: Trouble with ClusterCats


I had a problem with similar symptoms; turned out that the probe process
couldn't access cfprobe.cfm.  The method ClusterCats uses to decide where to
look for cfprobe.cfm is not clear to me, and if it can't get it for any
reason it decides that the server is busy.  Look in your IIS (or whatever)
logs for requests to cfprobe.cfm and see if they are being denied for some
reason.



> -Original Message-
> From: Trey Rouse [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, September 12, 2001 7:01 PM
> To: CF-Talk
> Subject: Trouble with ClusterCats
>
>
> I'm having some troubles configuring clustering on CF5.
>
> Specificaly, the load monitor on all servers runs at less
> than 3% for 20-30
> seconds then shoots up to 100% and makes the machine in the
> cluster offline.
>
> To simplify testing this, the problem duplicates by adding
> only a single
> machine to the cluster and bringing up load monitor.
>
> Here is my process:
>
> 1. Create the Cluster
> 2. Add A SINGLE machine to the cluster
> 3. Configure a basic probe to the btauxdir\cfprobe.cfm file
> checking for
> "Hello"
> 4. Manually verify cfprobe.cfm is working
> 5. Bring up the load monitor on the single server.
>
> Within 30 seconds server load is reported at 100%.  Using OS tools and
> checking the service, there is no noticable load.
>
> I have found restarting the CF monitoring service will return state to
> normal for another 20-30 seconds before jumping up to full
> utilization.
>
> I'm using a very simple configuration, 2 identical servers
> set up on DNS
> round robin. No hardware ballancing. My goal is primarily failover
> protection for when one machine becomes unavailable.
>
> I did find the hotfix about CPU utilization.  I didn't think
> it would apply
> to this as OS CPU utilization is unaffected by this, but the results
> duplicate regardless of applying the hotfix or not.
>
> On an unrelated note, I've descovered on every install of
> every machine I've
> ever made of CF5 w/ custerCATS the reset feature under ClusterCATS
> Administrator -> Advanced -> Reset fails with an unable to
> remove Btauxdir
> error message.
>
> I've looked around and found no related issues reported in
> support forums or
> addressed in a knowledge base article (go figure) so I
> thought I would see
> if anyone has any ideas here...
>
> Trey Rouse
> [EMAIL PROTECTED]
>
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RE: Trouble with ClusterCats

[mherbene]

I had a problem with similar symptoms; turned out that the probe process
couldn't access cfprobe.cfm.  The method ClusterCats uses to decide where to
look for cfprobe.cfm is not clear to me, and if it can't get it for any
reason it decides that the server is busy.  Look in your IIS (or whatever)
logs for requests to cfprobe.cfm and see if they are being denied for some
reason.



> -Original Message-
> From: Trey Rouse [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, September 12, 2001 7:01 PM
> To: CF-Talk
> Subject: Trouble with ClusterCats
> 
> 
> I'm having some troubles configuring clustering on CF5.
> 
> Specificaly, the load monitor on all servers runs at less 
> than 3% for 20-30
> seconds then shoots up to 100% and makes the machine in the 
> cluster offline.
> 
> To simplify testing this, the problem duplicates by adding 
> only a single
> machine to the cluster and bringing up load monitor.
> 
> Here is my process:
> 
> 1. Create the Cluster
> 2. Add A SINGLE machine to the cluster
> 3. Configure a basic probe to the btauxdir\cfprobe.cfm file 
> checking for
> "Hello"
> 4. Manually verify cfprobe.cfm is working
> 5. Bring up the load monitor on the single server.
> 
> Within 30 seconds server load is reported at 100%.  Using OS tools and
> checking the service, there is no noticable load.
> 
> I have found restarting the CF monitoring service will return state to
> normal for another 20-30 seconds before jumping up to full 
> utilization.
> 
> I'm using a very simple configuration, 2 identical servers 
> set up on DNS
> round robin. No hardware ballancing. My goal is primarily failover
> protection for when one machine becomes unavailable.
> 
> I did find the hotfix about CPU utilization.  I didn't think 
> it would apply
> to this as OS CPU utilization is unaffected by this, but the results
> duplicate regardless of applying the hotfix or not.
> 
> On an unrelated note, I've descovered on every install of 
> every machine I've
> ever made of CF5 w/ custerCATS the reset feature under ClusterCATS
> Administrator -> Advanced -> Reset fails with an unable to 
> remove Btauxdir
> error message.
> 
> I've looked around and found no related issues reported in 
> support forums or
> addressed in a knowledge base article (go figure) so I 
> thought I would see
> if anyone has any ideas here...
> 
> Trey Rouse
> [EMAIL PROTECTED]
>
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Trouble with ClusterCats

[Trey Rouse]

I'm having some troubles configuring clustering on CF5.

Specificaly, the load monitor on all servers runs at less than 3% for 20-30
seconds then shoots up to 100% and makes the machine in the cluster offline.

To simplify testing this, the problem duplicates by adding only a single
machine to the cluster and bringing up load monitor.

Here is my process:

1. Create the Cluster
2. Add A SINGLE machine to the cluster
3. Configure a basic probe to the btauxdir\cfprobe.cfm file checking for
"Hello"
4. Manually verify cfprobe.cfm is working
5. Bring up the load monitor on the single server.

Within 30 seconds server load is reported at 100%.  Using OS tools and
checking the service, there is no noticable load.

I have found restarting the CF monitoring service will return state to
normal for another 20-30 seconds before jumping up to full utilization.

I'm using a very simple configuration, 2 identical servers set up on DNS
round robin. No hardware ballancing. My goal is primarily failover
protection for when one machine becomes unavailable.

I did find the hotfix about CPU utilization.  I didn't think it would apply
to this as OS CPU utilization is unaffected by this, but the results
duplicate regardless of applying the hotfix or not.

On an unrelated note, I've descovered on every install of every machine I've
ever made of CF5 w/ custerCATS the reset feature under ClusterCATS
Administrator -> Advanced -> Reset fails with an unable to remove Btauxdir
error message.

I've looked around and found no related issues reported in support forums or
addressed in a knowledge base article (go figure) so I thought I would see
if anyone has any ideas here...

Trey Rouse
[EMAIL PROTECTED]
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Re: ClusterCats?

[Kirk Boecker]

Kevin,

We had this same issue, there is a article in the allaire KB on this.
What is needed is to change to dynamic IPs

Kirk


- Original Message -
From: "McCabe, Kevin" <[EMAIL PROTECTED]>
To: "CF-Talk" <[EMAIL PROTECTED]>
Sent: Friday, June 15, 2001 6:24 AM
Subject: ClusterCats?


> Hi Guys,
>
> Don't know if this is the right place to ask but I will.
>
> I have created a cluster on CF 4.5.1 SP2 (Two Machines)
>
> Using Dynamic IP's and Maintenance IP's.
>
> We thought that we would test a system crash.
>
> i.e. Switch one of the machines off.
>
> But when it comes back up the cluster admin doesn't show it as live
>
> But we get these emails one after the other every 30 seconds or so.
>
> Server (live02.intranet.bskyb.com) is now available and has reclaimed its
> system IP address (172.20.115.134) from server (ost-spectra-l01.bskyb.com)
>
> then:
>
> Server (live02.intranet.bskyb.com) is NOT AVAILABLE and its system IP
> address (172.20.115.134) has been claimed by server
> (ost-spectra-l01.bskyb.com)
>
> The only way to get it back up at the moment is to:
>
> A) Reboot both machines at the same time (NOT A REAL OPTION)
> B) Pull the network cable from the downed machine start the Web Service
and
> Site then place back the Cable.
>
> Any Ideas Guys Would be great
> ---
> Kev McCabe
> Intranet Team Leader
> Telephone: +44 (0) 20 7941 5502
> Mobile: +44 (0) 7711 172 730
> Mobex: 123 5502
> ---
>
>
>
> **
> Information in this email is confidential and may be privileged.
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> please notify the sender immediately and delete it from your system.
> You should not otherwise copy it, retransmit it or use or disclose its
> contents to anyone.
> Thank you for your co-operation.
> **
>
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ClusterCats?

[McCabe, Kevin]

Hi Guys,

Don't know if this is the right place to ask but I will.

I have created a cluster on CF 4.5.1 SP2 (Two Machines)

Using Dynamic IP's and Maintenance IP's.

We thought that we would test a system crash. 

i.e. Switch one of the machines off.

But when it comes back up the cluster admin doesn't show it as live

But we get these emails one after the other every 30 seconds or so.

Server (live02.intranet.bskyb.com) is now available and has reclaimed its
system IP address (172.20.115.134) from server (ost-spectra-l01.bskyb.com) 

then:

Server (live02.intranet.bskyb.com) is NOT AVAILABLE and its system IP
address (172.20.115.134) has been claimed by server
(ost-spectra-l01.bskyb.com) 

The only way to get it back up at the moment is to:

A) Reboot both machines at the same time (NOT A REAL OPTION)
B) Pull the network cable from the downed machine start the Web Service and
Site then place back the Cable.

Any Ideas Guys Would be great
---
Kev McCabe
Intranet Team Leader
Telephone:  +44 (0) 20 7941 5502
Mobile: +44 (0) 7711 172 730
Mobex:  123 5502
---



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Re: Failover and Load Balancing Solution for IIS/ColdFusion,but not ClusterCats.

[Michael Ross]

I too am investigating this now.  I have found that Microsoft NLB is a very good 
solution.  I am sure many others have different thoughts.  NLB lets you have up to 32 
servers in a cluster.  NLB is software based.There is lots of information out 
there on this.

mike

>>> [EMAIL PROTECTED] 05/17/01 07:12AM >>>
Dear subscribers,

please recomend me failover (and load balancing - it is important)
solution than can clusterise IIS/ColdFusion servers. Ideal will be
analog of ClusterCats.

I have tried ClusterCats, but it can't clusterise multi-webservers
IIS sites (I want create cluster for several virtual servers, but I
dont want to create separate clusters for each virtual server).

Thank you,
Alexandr Timchur.
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Failover and Load Balancing Solution for IIS/ColdFusion, but not ClusterCats.

[Alexandr Timchur]

Dear subscribers,

please recomend me failover (and load balancing - it is important)
solution than can clusterise IIS/ColdFusion servers. Ideal will be
analog of ClusterCats.

I have tried ClusterCats, but it can't clusterise multi-webservers
IIS sites (I want create cluster for several virtual servers, but I
dont want to create separate clusters for each virtual server).

Thank you,
Alexandr Timchur.


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ClusterCats vs. MS WebApplication Stress Tool

[Wagner Patrick]

Hello!

Has anyone of you experience with ClusterCats working together or stressed
with the MS WebApplication Stress Tool? 

When stressing with 4 concurrent users, the number of hits is decreasing in
the clustered environment (session aware management = ON) about more than
the half! Stressing on a single machine of the cluster returns better
results...

Has anyone an idea how to optimize the results?

Regards,

Patrick


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Re: ClusterCats

[Joseph Thompson]

Thank you for chiming in, I am going crazy..

Did you get it going on a Windows network?

I have been trying a twin Win2k Advanced server instalation... no joy.
Knowing it is possible will help :)



> I have been very satisfied with Cluster Cats its dont everything it said
it
> woudl do and more, it was a little tricky to setup just because of very
POOR
> documentation but its a pretty great program.
>
>
> Bill Wheatley
> Director of Development
> AEPS INC
> Allaire ColdFusion Consulting Partner
> Allaire Certified ColdFusion Developer
> http://www.aeps.com
> ICQ: 417645
> 954-472-6684 X303
>
> IMPORTANT NOTICE:
> This e-mail and any attachment to it is intended only to be read or used
by
> the named addressee.  It is confidential and may contain legally
privileged
> information.  No confidentiality or privilege is waived or lost by any
> mistaken transmission to you.  If you receive this e-mail in error, please
> immediately delete it from your system and notify the sender.  You must
not
> disclose, copy or use any part of this e-mail if you are not the intended
> recipient.  The RTA is not responsible for any unauthorized alterations to
> this e-mail or attachment to it
> - Original Message -
> From: "Joseph Thompson" <[EMAIL PROTECTED]>
> To: "CF-Talk" <[EMAIL PROTECTED]>
> Sent: Wednesday, April 25, 2001 4:16 AM
> Subject: Re: ClusterCats
>
>
> > Great, ty.
> >
> > Is it me or is ClusterCats just not that popular?
> > I know there are other methods of "clustering" anyone have a
> favourite?
> >
> > > Try this link.
> > > http://www.katungroup.com/cfscale.htm
> > >
> > >
> > > -Original Message-----
> > > From: Joseph Thompson [mailto:[EMAIL PROTECTED]]
> > > Sent: Tuesday, April 24, 2001 9:35 PM
> > > To: CF-Talk
> > > Subject: ClusterCats
> > >
> > >
> > > If any one has any experience in setting up ClusterCats in a Win2K
> > > environment could they conact me on/off list?
> > >
> >
>
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Re: ClusterCats

[William J Wheatley]

I have been very satisfied with Cluster Cats its dont everything it said it
woudl do and more, it was a little tricky to setup just because of very POOR
documentation but its a pretty great program.


Bill Wheatley
Director of Development
AEPS INC
Allaire ColdFusion Consulting Partner
Allaire Certified ColdFusion Developer
http://www.aeps.com
ICQ: 417645
954-472-6684 X303

IMPORTANT NOTICE:
This e-mail and any attachment to it is intended only to be read or used by
the named addressee.  It is confidential and may contain legally privileged
information.  No confidentiality or privilege is waived or lost by any
mistaken transmission to you.  If you receive this e-mail in error, please
immediately delete it from your system and notify the sender.  You must not
disclose, copy or use any part of this e-mail if you are not the intended
recipient.  The RTA is not responsible for any unauthorized alterations to
this e-mail or attachment to it
- Original Message -
From: "Joseph Thompson" <[EMAIL PROTECTED]>
To: "CF-Talk" <[EMAIL PROTECTED]>
Sent: Wednesday, April 25, 2001 4:16 AM
Subject: Re: ClusterCats


> Great, ty.
>
> Is it me or is ClusterCats just not that popular?
> I know there are other methods of "clustering" anyone have a
favourite?
>
> > Try this link.
> > http://www.katungroup.com/cfscale.htm
> >
> >
> > -Original Message-
> > From: Joseph Thompson [mailto:[EMAIL PROTECTED]]
> > Sent: Tuesday, April 24, 2001 9:35 PM
> > To: CF-Talk
> > Subject: ClusterCats
> >
> >
> > If any one has any experience in setting up ClusterCats in a Win2K
> > environment could they conact me on/off list?
> >
>
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Re: ClusterCats

[Joseph Thompson]

Great, ty.

Is it me or is ClusterCats just not that popular?
I know there are other methods of "clustering" anyone have a favourite?

> Try this link.
> http://www.katungroup.com/cfscale.htm
>
>
> -Original Message-
> From: Joseph Thompson [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, April 24, 2001 9:35 PM
> To: CF-Talk
> Subject: ClusterCats
>
>
> If any one has any experience in setting up ClusterCats in a Win2K
> environment could they conact me on/off list?
>
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RE: ClusterCats

[Bill G]

Try this link.
http://www.katungroup.com/cfscale.htm


-Original Message-
From: Joseph Thompson [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, April 24, 2001 9:35 PM
To: CF-Talk
Subject: ClusterCats


If any one has any experience in setting up ClusterCats in a Win2K
environment could they conact me on/off list?
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ClusterCats

[Joseph Thompson]

If any one has any experience in setting up ClusterCats in a Win2K
environment could they conact me on/off list?



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RE: ClusterCATS

[Dave Watts]

> is it an additional install? or is it automatically installed 
> with CF Server Ent? The reason I ask is we have the CF Server 
> Enterprise Upgrade. I looked thrugh the install CD and cannot 
> find any reference to an install for ClusterCATS. The only thing 
> I see referring to ClusterCATS is in the CF Documentation on 
> the CD.

During the install process, you should see a list of choices and checkboxes
for those choices. One of the choices should say "Load balancing and
failover" or something like that. ClusterCATS isn't a separate install.

Dave Watts, CTO, Fig Leaf Software
http://www.figleaf.com/
voice: (202) 797-5496
fax: (202) 797-5444

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RE: ClusterCATS

[Chris Alvarado]

is it an additional install? or is it automatically installed with CF Server
Ent? The reason I ask is we have the CF Server Enterprise Upgrade. I looked
thrugh the install CD and cannot find any reference to an install for
ClusterCATS. The only thing I see referring to ClusterCATS is in the CF
Documentation on the CD.

-chris

-Original Message-
From: Steve Drucker [mailto:[EMAIL PROTECTED]]
Sent: Monday, February 12, 2001 9:15 AM
To: CF-Talk
Subject: RE: ClusterCATS


It's bundled as a component of CF Enterprise.

-S

-Original Message-
From: Chris Alvarado [mailto:[EMAIL PROTECTED]]
Sent: Monday, February 12, 2001 10:07 AM
To: CF-Talk
Subject: ClusterCATS


Doing some research on Clustering within a Cold Fusion environment and I
came accross the ClusterCATS product. I have read about it before and it
seems that it would suit our needs well. The only thing I cannot seem to
find is, WHERE CAN I GET IT?

Anyone help me out here?

Thanks,


-chris.alvarado
[developer] - VerticalNet




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RE: ClusterCATS

[Steve Drucker]

It's bundled as a component of CF Enterprise.

-S

-Original Message-
From: Chris Alvarado [mailto:[EMAIL PROTECTED]]
Sent: Monday, February 12, 2001 10:07 AM
To: CF-Talk
Subject: ClusterCATS


Doing some research on Clustering within a Cold Fusion environment and I
came accross the ClusterCATS product. I have read about it before and it
seems that it would suit our needs well. The only thing I cannot seem to
find is, WHERE CAN I GET IT?

Anyone help me out here?

Thanks,


-chris.alvarado
[developer] - VerticalNet




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ClusterCATS

[Chris Alvarado]

Doing some research on Clustering within a Cold Fusion environment and I
came accross the ClusterCATS product. I have read about it before and it
seems that it would suit our needs well. The only thing I cannot seem to
find is, WHERE CAN I GET IT?

Anyone help me out here?

Thanks,


-chris.alvarado
[developer] - VerticalNet




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RE: ClusterCATS vs. hardware

[Michael Buffington]

Actually, using the getmetric() tag, we're able to have our load balancing
hardware base it's load balancing off of the ColdFusion box's current load.

We have our load balancer check a special page with nothing but the current
running requests, and if the Running Requests are too high, it will send
requests to the next available server.

If ColdFusion isn't running (ie - no metrics coming back), the LB will send
it to the next available server.

We use a competitor to F5, but I'm pretty sure F5 can do the same thing.

Michael Buffington
[EMAIL PROTECTED]
(714) 556-3890 x222
http://www.price.com 

-Original Message-
From: Philip Arnold - ASP [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, January 23, 2001 7:30 AM
To: CF-Talk
Subject: RE: ClusterCATS vs. hardware


> If I am using a hardware load balancing router (such as Cisco
> LoadDirector, or F5, or Alteon, etc), my application does not use
> Session variables, and my Client variables are stored in the database...
>
> Is there any benefit in using ClusterCATS in addition to my
> hardware load balancer?
>
> I already have users being directed to the server with the least
> load. I already have dead servers being taken out of rotation.

OK, ClusterCats does one thing that hardware will never do - CF processing
balancing

ClusterCats will send requests to the least busy server for CF requests
while hardware ones will only sent to ones which are still active (ping wise
usually), also ClusterCats will determine if CF isn't running and won't send
to there...

Philip Arnold
Director
Certified ColdFusion Developer
ASP Multimedia Limited
T: +44 (0)20 8680 1133

"Websites for the real world"

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RE: ClusterCATS vs. hardware

[Philip Arnold - ASP]

> If I am using a hardware load balancing router (such as Cisco
> LoadDirector, or F5, or Alteon, etc), my application does not use
> Session variables, and my Client variables are stored in the database...
>
> Is there any benefit in using ClusterCATS in addition to my
> hardware load balancer?
>
> I already have users being directed to the server with the least
> load. I already have dead servers being taken out of rotation.

OK, ClusterCats does one thing that hardware will never do - CF processing
balancing

ClusterCats will send requests to the least busy server for CF requests
while hardware ones will only sent to ones which are still active (ping wise
usually), also ClusterCats will determine if CF isn't running and won't send
to there...

Philip Arnold
Director
Certified ColdFusion Developer
ASP Multimedia Limited
T: +44 (0)20 8680 1133

"Websites for the real world"

**
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ClusterCATS vs. hardware

[Peter Theobald]

If I am using a hardware load balancing router (such as Cisco LoadDirector, or F5, or 
Alteon, etc), my application does not use Session variables, and my Client variables 
are stored in the database... 

Is there any benefit in using ClusterCATS in addition to my hardware load balancer?

I already have users being directed to the server with the least load. I already have 
dead servers being taken out of rotation.


---
Peter Theobald, Chief Technology Officer
LiquidStreaming http://www.liquidstreaming.com
[EMAIL PROTECTED]
Phone 1.212.545.1232 x204 Fax 1.212.545.0938

To put this contact information into your Palm device, click here:
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clustercats and planned downtime

[mherbene]

When I need to take a server down for a significant period of time and
possible multiple reboots, I'd like to tell clustercats that a machine is
down and that its IP address should be assumed by other cluster members
until told otherwise.  I want to prevent any traffic from coming to the
machine that's down without having to make DNS changes.  

Anyone know how, or if it's even possible?

thanks

---
Martin Herbener
[EMAIL PROTECTED]
Kentucky Department of Education


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RE: CF Enterprise w/ Clustering w/o ClusterCats

[Rob Sherman]

Opps..  found it:
http://www.allaire.com/Handlers/index.cfm?ID=15984&Method=Full

Thanks for the tip, Doug.


Sincerely,

Rob Sherman
President

CFDude, Inc.  http://www.cfdude.com
Allaire Certified Developer & Instructor
--
 (310) 543-1622  (310) 543-0512
 [EMAIL PROTECTED] 3266081
 RobSShermRobSherman_CFDev




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RE: CF Enterprise w/ Clustering w/o ClusterCats

[Rob Sherman]

>You can use F5 to distribute the load to a CF server just like you would to
>an ASP server.  However, if you buy CF Enterprise you might as well turn on
>the ClusterCats portion to assist in some of the load balancing.  Allaire
>has an integration plan for CF and Cisco's Local Director.  You might see
if
>that approach would work with F5.


Doug,
Any idea where the integration plan is?  I searched the Knowledge base and
only found reference that the Cluster Cats works with Cisco's Local
Director.


Sincerely,

Rob Sherman
President

CFDude, Inc.  http://www.cfdude.com
Allaire Certified Developer & Instructor
--
 (310) 543-1622  (310) 543-0512
 [EMAIL PROTECTED] 3266081
 RobSShermRobSherman_CFDev



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RE: CF Enterprise w/ Clustering w/o ClusterCats

[dougn]

You can use F5 to distribute the load to a CF server just like you would to
an ASP server.  However, if you buy CF Enterprise you might as well turn on
the ClusterCats portion to assist in some of the load balancing.  Allaire
has an integration plan for CF and Cisco's Local Director.  You might see if
that approach would work with F5.

-Original Message-
From: Rob Sherman [mailto:[EMAIL PROTECTED]]
Sent: Friday, August 18, 2000 7:43 PM
To: [EMAIL PROTECTED]
Subject: CF Enterprise w/ Clustering w/o ClusterCats


I have a client that bought a company that develops in Cold Fusion and he is
looking to integrate into his ASP / VB house (yeah) and he wants to know if
it is possible, and how to accomplish clustering of the Cold Fusion
Enterprise Servers using F5's clustering hardware.  He does NOT want to use
the ClusterCats software.

If anyone has any do's / don'ts or "gotchas" I'd appreciate the insight.


Sincerely,

Rob Sherman
President

CFDude, Inc.  http://www.cfdude.com
Allaire Certified Developer & Instructor
--
 (310) 543-1622  (310) 543-0512
 [EMAIL PROTECTED] 3266081
 RobSShermRobSherman_CFDev




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CF Enterprise w/ Clustering w/o ClusterCats

[Rob Sherman]

I have a client that bought a company that develops in Cold Fusion and he is
looking to integrate into his ASP / VB house (yeah) and he wants to know if
it is possible, and how to accomplish clustering of the Cold Fusion
Enterprise Servers using F5's clustering hardware.  He does NOT want to use
the ClusterCats software.

If anyone has any do's / don'ts or "gotchas" I'd appreciate the insight.


Sincerely,

Rob Sherman
President

CFDude, Inc.  http://www.cfdude.com
Allaire Certified Developer & Instructor
--
 (310) 543-1622  (310) 543-0512
 [EMAIL PROTECTED] 3266081
 RobSShermRobSherman_CFDev



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RE: Cisco LoadDirector - Do I need ClusterCATS?

[Kevin Miller]

Well, yes and no.  LocalDirector will do the load balancing piece just
fine by itself.  ClusterCATS, from what I understand, can integrate with
LocalDirector to provide monitoring of the specific CF service, rather
than just a heartbeat on the overall server up/down status.

Kevin

>>> [EMAIL PROTECTED] 08/17/00 10:04AM >>>
Nope. :)


Jeremy Allen
[EMAIL PROTECTED] 
[Insert cool title here]

-Original Message-
From: Peter Theobald [mailto:[EMAIL PROTECTED]] 
Sent: Thursday, August 17, 2000 12:45 PM
To: [EMAIL PROTECTED]; [EMAIL PROTECTED] 
Subject: Cisco LoadDirector - Do I need ClusterCATS?


If I use a load balancing router like the Cisco LoadDirector or
CoyotePoint
Equalizer to distribute requests between two Cold Fusion web servers,
why do
I need ClusterCATS?

I use a database repository for Client variables. I dont client
specific
session or application variables.



---
Peter Theobald, Chief Technology Officer
LiquidStreaming http://www.liquidstreaming.com 
[EMAIL PROTECTED] 
Phone 1.212.545.1232 Fax 1.212.679.8032


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RE: Anyone using ClusterCATS?

[Conrad, Christopher]

eh yeah - you guys will get a kick out of this - We were using LocalDirector
in our old shared infrastructure - however somehow IBM convinced somebody
here that their eND box was better than LocalDirector. So when we went to
our dedicated site in Raleigh - LocalDirector was out and eND was in. Not
sure how that happened - but you can expect that from IBM - so with our
current site configuration- this is not an option for us. 

Chris

Christopher Conrad
Victoria's Secret Catalogue
Limited Technology Services - New Media
Senior.Programmer.Analyst
http://www.VictoriasSecret.com
614.337.5653
[EMAIL PROTECTED]


-Original Message-
From: JustinMacCarthy [mailto:[EMAIL PROTECTED]]
Sent: Thursday, August 17, 2000 1:03 PM
To: [EMAIL PROTECTED]
Subject: Re: Anyone using ClusterCATS?


Have you looked at LocalDirector?

~Justin MacCarthy

- Original Message -
From: "Conrad, Christopher" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, August 17, 2000 5:44 PM
Subject: RE: Anyone using ClusterCATS?


> We would like to use it - however it disables NES front-end accelerator
> cache. Although this is not an Allaire issue - I sure wish Allaire would
> push NES harder for a fix - other than telling it's customers:
>
> "Note that while the Cluster Cat developers do not recommend specific web
> servers, CC does not have the same problem with Apache on Solaris; this is
a
> NES issue."
>
> So basically - if www.VictoriasSecret.com want to use Cluster Cats -
switch
> to Apache.
>
> I don't like the response - so we're not sure what to do at this point -
> however I know we won't be switching to Apache anytime soon.
>
> Chris
>
> Christopher Conrad
> Victoria's Secret Catalogue
> Limited Technology Services - New Media
> Senior.Programmer.Analyst
> http://www.VictoriasSecret.com
> 614.337.5653
> [EMAIL PROTECTED]
>
>
> -Original Message-
> From: Andy Ewings [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, August 17, 2000 12:25 PM
> To: '[EMAIL PROTECTED]'
> Subject: RE: Anyone using ClusterCATS?
>
>
> We are using ClusterCats for one of our projects which has 2 web servers
and
> 2 database servers.  However, we are not hosting the servers and the
company
> who is set it all up so I can't tell you much about it.  From what I
> understand though it does the job.
>
> -Original Message-
> From: Kevin Miller [mailto:[EMAIL PROTECTED]]
> Sent: 17 August 2000 17:23
> To: [EMAIL PROTECTED]
> Subject: Anyone using ClusterCATS?
>
>
>
> We are beginning to look into clustering technology.  Is anyone using
> ClusterCATS?  How would you relate it to other clustering packages?
>
> Any info or pointers you can provide is much appreciated,
>
> Kevin
>
> --
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Re: Anyone using ClusterCATS?

[JustinMacCarthy]

Have you looked at LocalDirector?

~Justin MacCarthy

- Original Message -
From: "Conrad, Christopher" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, August 17, 2000 5:44 PM
Subject: RE: Anyone using ClusterCATS?


> We would like to use it - however it disables NES front-end accelerator
> cache. Although this is not an Allaire issue - I sure wish Allaire would
> push NES harder for a fix - other than telling it's customers:
>
> "Note that while the Cluster Cat developers do not recommend specific web
> servers, CC does not have the same problem with Apache on Solaris; this is
a
> NES issue."
>
> So basically - if www.VictoriasSecret.com want to use Cluster Cats -
switch
> to Apache.
>
> I don't like the response - so we're not sure what to do at this point -
> however I know we won't be switching to Apache anytime soon.
>
> Chris
>
> Christopher Conrad
> Victoria's Secret Catalogue
> Limited Technology Services - New Media
> Senior.Programmer.Analyst
> http://www.VictoriasSecret.com
> 614.337.5653
> [EMAIL PROTECTED]
>
>
> -Original Message-
> From: Andy Ewings [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, August 17, 2000 12:25 PM
> To: '[EMAIL PROTECTED]'
> Subject: RE: Anyone using ClusterCATS?
>
>
> We are using ClusterCats for one of our projects which has 2 web servers
and
> 2 database servers.  However, we are not hosting the servers and the
company
> who is set it all up so I can't tell you much about it.  From what I
> understand though it does the job.
>
> -Original Message-
> From: Kevin Miller [mailto:[EMAIL PROTECTED]]
> Sent: 17 August 2000 17:23
> To: [EMAIL PROTECTED]
> Subject: Anyone using ClusterCATS?
>
>
>
> We are beginning to look into clustering technology.  Is anyone using
> ClusterCATS?  How would you relate it to other clustering packages?
>
> Any info or pointers you can provide is much appreciated,
>
> Kevin
>
> --
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RE: Cisco LoadDirector - Do I need ClusterCATS?

[Jeremy Allen]

Nope. :)


Jeremy Allen
[EMAIL PROTECTED]
[Insert cool title here]

-Original Message-
From: Peter Theobald [mailto:[EMAIL PROTECTED]]
Sent: Thursday, August 17, 2000 12:45 PM
To: [EMAIL PROTECTED]; [EMAIL PROTECTED]
Subject: Cisco LoadDirector - Do I need ClusterCATS?


If I use a load balancing router like the Cisco LoadDirector or CoyotePoint
Equalizer to distribute requests between two Cold Fusion web servers, why do
I need ClusterCATS?

I use a database repository for Client variables. I dont client specific
session or application variables.



---
Peter Theobald, Chief Technology Officer
LiquidStreaming http://www.liquidstreaming.com
[EMAIL PROTECTED]
Phone 1.212.545.1232 Fax 1.212.679.8032


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Cisco LoadDirector - Do I need ClusterCATS?

[Peter Theobald]

If I use a load balancing router like the Cisco LoadDirector or CoyotePoint Equalizer 
to distribute requests between two Cold Fusion web servers, why do I need ClusterCATS?

I use a database repository for Client variables. I dont client specific session or 
application variables.



---
Peter Theobald, Chief Technology Officer
LiquidStreaming http://www.liquidstreaming.com
[EMAIL PROTECTED]
Phone 1.212.545.1232 Fax 1.212.679.8032

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RE: Anyone using ClusterCATS?

[Conrad, Christopher]

We would like to use it - however it disables NES front-end accelerator
cache. Although this is not an Allaire issue - I sure wish Allaire would
push NES harder for a fix - other than telling it's customers:

"Note that while the Cluster Cat developers do not recommend specific web
servers, CC does not have the same problem with Apache on Solaris; this is a
NES issue."

So basically - if www.VictoriasSecret.com want to use Cluster Cats - switch
to Apache. 

I don't like the response - so we're not sure what to do at this point -
however I know we won't be switching to Apache anytime soon.

Chris

Christopher Conrad
Victoria's Secret Catalogue
Limited Technology Services - New Media
Senior.Programmer.Analyst
http://www.VictoriasSecret.com
614.337.5653
[EMAIL PROTECTED]


-Original Message-
From: Andy Ewings [mailto:[EMAIL PROTECTED]]
Sent: Thursday, August 17, 2000 12:25 PM
To: '[EMAIL PROTECTED]'
Subject: RE: Anyone using ClusterCATS?


We are using ClusterCats for one of our projects which has 2 web servers and
2 database servers.  However, we are not hosting the servers and the company
who is set it all up so I can't tell you much about it.  From what I
understand though it does the job.

-Original Message-
From: Kevin Miller [mailto:[EMAIL PROTECTED]]
Sent: 17 August 2000 17:23
To: [EMAIL PROTECTED]
Subject: Anyone using ClusterCATS?



We are beginning to look into clustering technology.  Is anyone using
ClusterCATS?  How would you relate it to other clustering packages?  

Any info or pointers you can provide is much appreciated,

Kevin


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RE: Anyone using ClusterCATS?

[Andy Ewings]

We are using ClusterCats for one of our projects which has 2 web servers and
2 database servers.  However, we are not hosting the servers and the company
who is set it all up so I can't tell you much about it.  From what I
understand though it does the job.

-Original Message-
From: Kevin Miller [mailto:[EMAIL PROTECTED]]
Sent: 17 August 2000 17:23
To: [EMAIL PROTECTED]
Subject: Anyone using ClusterCATS?



We are beginning to look into clustering technology.  Is anyone using
ClusterCATS?  How would you relate it to other clustering packages?  

Any info or pointers you can provide is much appreciated,

Kevin


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Anyone using ClusterCATS?

[Kevin Miller]

We are beginning to look into clustering technology.  Is anyone using ClusterCATS?  
How would you relate it to other clustering packages?  

Any info or pointers you can provide is much appreciated,

Kevin

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CF 4.5.1/Win 2000 - Configuring ClusterCats offline maintenance support

[Tom Clark]

I am looking for tips in setting up and using CF 4.5.1/ClusterCats on
Windows 2000. I have a two server setup that I'm experimenting on to get a
feel for how it works. My specific question concerns configuring ClusterCats
offline maintenance support on such machines. The Windows 2000 network
dialogs are significantly different than with NT 4.0. Certainly it's easy to
find the screens similar to the 4.0 ones for making this configuration (see
Chapter 6 in "Administering ColdFusion Server 4.5). But are there any
critical differences in the setting up process? I've not done this before
and I'd like to not screw it up.

I put this on Allaire's online CF forum also, but I figured I'd get a
broader and quicker response if I posted to all of you.  Thanks for your
thoughts on this. 

Tom

===
Tom Clark
Telect, Inc.
Spokane, Washington

All generalizations are false.

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RE: ClusterCats and 4.5 enterprise upgrade... Where is it?

[Mark W. Breneman]

I installed the upgrade 4 times (on two servers) looking for that check box.
(to in install clustercats)  It is not there.

More info...  We bought CF 4.5 pro from beyond.com and then bought the
upgrade to enterprise also from beyond.com.  Might that make a difference?
I also tried to install the 4.5 enterprise ver clean on a server by entering
the pro serial number when it prompted for a product to upgrade from and
then I entered the enterprise number when it prompted for the enterprise SN.
Still same result.  No clustering options.

Is it possible that I have found a CF enterprise ver that does not allow
clustering?
Any ideas?   Thanks


Mark W. Breneman
-Cold Fusion Developer
-Network Administrator
  Vivid Media
  [EMAIL PROTECTED]
  www.vividmedia.com
  608.270.9770


-Original Message-
From: Adam Breaux [mailto:[EMAIL PROTECTED]]
Sent: Thursday, July 13, 2000 1:23 PM
To: [EMAIL PROTECTED]
Subject: RE: ClusterCats and 4.5 enterprise upgrade... Where is it?


It should have been a check box during the install to add cluster and load
balancing.

-Original Message-
From: Mark W. Breneman [mailto:[EMAIL PROTECTED]]
Sent: Thursday, July 13, 2000 12:31 PM
To: [EMAIL PROTECTED]
Subject: ClusterCats and 4.5 enterprise upgrade... Where is it?



I just installed the upgrade to 4.5 ent. (from 4.5 pro) where is the
Clustercat files?  All the documentation I can find states the CF4.5
enterprise has clustercats included.  So where is it?

Thanks

Mark W. Breneman
-Cold Fusion Developer
-Network Administrator
  Vivid Media
  [EMAIL PROTECTED]
  www.vividmedia.com
  608.270.9770


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RE: ClusterCats and 4.5 enterprise upgrade... Where is it?

[Adam Breaux]

It should have been a check box during the install to add cluster and load
balancing.

-Original Message-
From: Mark W. Breneman [mailto:[EMAIL PROTECTED]]
Sent: Thursday, July 13, 2000 12:31 PM
To: [EMAIL PROTECTED]
Subject: ClusterCats and 4.5 enterprise upgrade... Where is it?



I just installed the upgrade to 4.5 ent. (from 4.5 pro) where is the
Clustercat files?  All the documentation I can find states the CF4.5
enterprise has clustercats included.  So where is it?

Thanks

Mark W. Breneman
-Cold Fusion Developer
-Network Administrator
  Vivid Media
  [EMAIL PROTECTED]
  www.vividmedia.com
  608.270.9770


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ClusterCats and 4.5 enterprise upgrade... Where is it?

[Mark W. Breneman]

I just installed the upgrade to 4.5 ent. (from 4.5 pro) where is the
Clustercat files?  All the documentation I can find states the CF4.5
enterprise has clustercats included.  So where is it?

Thanks

Mark W. Breneman
-Cold Fusion Developer
-Network Administrator
  Vivid Media
  [EMAIL PROTECTED]
  www.vividmedia.com
  608.270.9770

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Clustercats and PTR records

[mherbene]

CF 4.5's clustercats instructions recommend creating both a static IP
address for the machine and a different "dynamic" IP address for the site on
that machine; that is, each machine in the cluster is supposed to have two
IP addresses and corresponding DNS names, one for the server and one for the
website (assumiing one site...).   The instructions elsewhere say that you
should be sure to define PTR (reverse lookup) records "for your Web
servers."  I'm wondering if PTR records should be created for both the
addresses of a given machine, or just the site address, or just the server
address.  Any ideas?

---
Martin Herbener
[EMAIL PROTECTED]
Kentucky Department of Education


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ClusterCATS and HLB integration

[Marcello Frutig]

Hi!

I'll be deploying an application in a CF Enterprise/ClusterCATS cluster (Win2000). 
There is already a Alteon hardware load balancer installed. I have three options:

1. configure ClusterCATS to just provide CF server recovery and let Alteon do the load 
balancing and server failover
2. configure ClusterCATS to provide CF server recovery and also application load 
balancing
3. configure ClusterCATS to provide CF server recovery, load balancing and server 
failover

What would be the preferred ClusterCATS configuration?

Thanks in advance,
best regards,
Marcello Frutig.
-- Astrolabio

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ClusterCats

[Jason Clark]

Anyone have experiences to share regarding clustercats? I played with it a 
bit this weekend and had nothing but problems.
First off the version with 4.5.1 showed the servers at 100% all the time 
even though they were at maybe 5%, so backed off and
went to 4.0.1 and now it randomly shows servers as unreachable half the 
time? The instructions for setting it up and tech docs
are the worst I have ever seen. Anyway, any input/suggestions are welcome.

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ClusterCats

[Jason Clark]

Anyone have experiences to share regarding clustercats? I played with it a 
bit this weekend and had nothing but problems.
First off the version with 4.5.1 showed the servers at 100% all the time 
even though they were at maybe 5%, so backed off and
went to 4.0.1 and now it randomly shows servers as unreachable half the 
time? The instructions for setting it up and tech docs
are the worst I have ever seen. Anyway, any input/suggestions are welcome. 

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RE: benefits of Enterprise without ClusterCats?

[Ryan Hill]

Since I've been down this road recently, I thought I would throw this out
here.  Just some notes from the field, IMHO:

1.) Don't even attempt to use Cluster Cats in a production environment.
a.) Poor performance under all load conditions.
b.) Advanced documentation or reference?  What?  Where?
c.) Poor support from Allaire - they don't even reccomend using it.

We were going to try to run it for a new client but load testing in our
staging environment completely destroyed any benefits we might have
obtained.  If you really need this functionality, invest in a hardware
solution - yeah they're expensive, I know - but they are DEFINATELY worth
it.

Don't even get me started on Advanced Security and Spectra
whooe!

Regards,

Ryan Hill, MCSE
Director, Systems Integration
Market Matrix, Inc. - http://www.marketmatrix.com 

-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Thursday, May 25, 2000 3:29 PM
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Subject: RE: benefits of Enterprise without ClusterCats?


> I'm moving to a clustered server using NT/IIS/SQL, but I plan on using
> Local Director, and NOT ClusterCats.  In this case, is there
> any benefit to running Enterprise over Professional?
>
> I'm assume that the following features of Enterprise are tied to using
> ClusterCats, but I couldn't really tell:
>
> * Service-Level Failover
> * Dynamic Load Balancing
> * Automatic Server Failover

You're correct. All of those features are provided by ClusterCats. You may
find it useful to use ClusterCats in conjunction with LocalDirector, though.

In addition, Enterprise provides native database drivers - worth it if
you're using Oracle - and the Advanced Security engine, which is powerful
(although very obtuse) and required for Spectra.

Dave Watts, CTO, Fig Leaf Software
http://www.figleaf.com/
voice: (202) 797-5496
fax: (202) 797-5444


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Re: Running ClusterCats through proxy - Solution

[Dave Wilson]

Hi all,

I posted this problem to the list several days ago but got no response.
Turns, out I've found a workaround to the problem - see transcript between
myself and colleague who had the problem below. Might be useful for some of
you working on clustered intranet/extranet scenarios with sites connecting
via proxies, not wishing to utilise DNS for whatever reasons.

*
The proxy servers/hosts file was the key!!!

Problem: To connect to our web servers we are going through a proxy server.
We were connecting to the server from the client using IP addresses.
Everything works fine. However if the server dies and clustercats kicks in,
the secondary server will take control. However the browser will be told to
request information from the secondary server but instead of using its IP it
uses its machine name instead which cannot be resolved. The problem lies in
that the browser routes all requests to the proxy server which tries to
resolve address. Because we are using an IP address for the primary server
this is not a problem, but for the secondary we are using a machine name
which cannot be resolved so it fails.

Solution: stick the ip/machine name into the hosts file for the proxy
server.

We are trying this out on the customers site next week, so hopefully all
will go well.

Simple when you know how. Thanks for the help, bang on the nose..

Gary.


-Original Message-
From: Dave Wilson [mailto:[EMAIL PROTECTED]]
Sent: Thursday, May 25, 2000 12:35 PM
To: Gary Campbell
Subject: Re:

Gary,

Does the system have a fully qualified internet domain name
associated with
it? If so, then what you will need to do is use static IP's
for each of the
web servers, then have host entries in (Internet) DNS for
each machine.

e.g. you have two webservers in a cluster called
ww1.dartuk.com and
ww2.dartuk.com
When the client connects to ww1.dartuk.com and it fails,
they will be
redirected to ww2.dartuk.com. You cluster would be known as
dartuk.com. The
internet DNS zone file will handle the IP resolution (Use
Round Robin DNS to
add a second tier to your load balancing solution). As a
safeguard, you
could also, perhaps edit the hosts files found in
winnt/system32/drivers/etc/ folder on each of the proxy
servers at client
locations to include records pointing to each host of the
system similar to
this:

123.45.67.8 ww1.dartuk.com
123.45.67.9 ww2.dartuk.com

This helps because NT queries it's local hosts file before
carrying out DNS
queries.

Hope some of these ideas help you out, I'm just thinking out
loud and some
may be inapplicable to your specific setup.


Dave Wilson
Internet Technology Manager,
BizNet Solutions


Co-Founder CFUG Ireland
http://www.cfug.ie

224, Lisburn Road
Belfast BT9 6GE

Tel: 02890 225 776
Fax: 02890 223 223
web: http://www.biznet-solutions.com

email: [EMAIL PROTECTED]
- Original Message -
From: Dave Wilson <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, May 24, 2000 3:09 PM
Subject: ClusterCats through proxy


> Hi all,
>
> I have a colleague who is looking advice for implementing ClusterCats
whilst
> behind a proxy server. They have no problems getting the failover to work,
> but what happens is that the failover resolves to an internal IP which is
> (obviously) inaccessible to the public users.
>
> Quote from colleague
> ***
> As described previously we are using two Enterprise servers, in a standard
> primary/secondary configuration. If the primary fails then the secondary
> will take over processing.
>
> Can you give me an indication if you help us with the following
>
> 1) I want to be able to connect a client to the server through a proxy
> server.
> 2) Then I want to "crash" the primary so that the secondary will take
> over processing
> 3) The secondary will proceed to server live pages as normal
>
> We have tried it over here, but we run into problems of DNS names. The
live
> customers site is worldwide so we were going to use IP address to connect
to
> the system. I know this is not the best solution but I'm open to another
> other ideas, which do not entail a re-configuration of the network. When
we
> connect to the primary with an IP - no problems, however on failure, we do
> get rolled over to the secondary but because the client is given a DNS
name
> it can't resolve it so it fails.
> ***
> MY colleague is also running SQL server database, so I have suggested that
> he simply move the two web servers to the public side of the proxy and
> maintain the db connection through the proxy via dedicated switch, hence
> protecting the data, which in essence is pretty much all that needs
> protecting.
>
>
> Does anyone have any better ideas for this?
>
> TIA
>
> Dave
>

RE: benefits of Enterprise without ClusterCats?

[Dave Watts]

> I'm moving to a clustered server using NT/IIS/SQL, but I plan on using
> Local Director, and NOT ClusterCats.  In this case, is there
> any benefit to running Enterprise over Professional?
>
> I'm assume that the following features of Enterprise are tied to using
> ClusterCats, but I couldn't really tell:
>
> * Service-Level Failover
> * Dynamic Load Balancing
> * Automatic Server Failover

You're correct. All of those features are provided by ClusterCats. You may
find it useful to use ClusterCats in conjunction with LocalDirector, though.

In addition, Enterprise provides native database drivers - worth it if
you're using Oracle - and the Advanced Security engine, which is powerful
(although very obtuse) and required for Spectra.

Dave Watts, CTO, Fig Leaf Software
http://www.figleaf.com/
voice: (202) 797-5496
fax: (202) 797-5444

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RE: benefits of Enterprise without ClusterCats?

[jstiefel]

If you're connecting to Oracle, you'll need Enterprise to take advantage of
the native drivers. They're MUCH faster than ODBC.

-Original Message-
From: Greg Saunders [mailto:[EMAIL PROTECTED]]
Sent: Thursday, May 25, 2000 10:31 AM
To: [EMAIL PROTECTED]
Subject: benefits of Enterprise without ClusterCats?


I'm moving to a clustered server using NT/IIS/SQL, but I plan on using
Local Director, and NOT ClusterCats.  In this case, is there any benefit to
running Enterprise over Professional?  

I'm assume that the following features of Enterprise are tied to using
ClusterCats, but I couldn't really tell:

* Service-Level Failover 
* Dynamic Load Balancing
* Automatic Server Failover


Thanks,

Gregory M. Saunders, Ph.D.
Senior Design Architect
Cognitive Arts Corporation (http://www.cognitivearts.com)
120 S. Riverside Plaza, Suite 1520
Chicago, IL 60606


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benefits of Enterprise without ClusterCats?

[Greg Saunders]

I'm moving to a clustered server using NT/IIS/SQL, but I plan on using
Local Director, and NOT ClusterCats.  In this case, is there any benefit to
running Enterprise over Professional?  

I'm assume that the following features of Enterprise are tied to using
ClusterCats, but I couldn't really tell:

* Service-Level Failover 
* Dynamic Load Balancing
* Automatic Server Failover


Thanks,

Gregory M. Saunders, Ph.D.
Senior Design Architect
Cognitive Arts Corporation (http://www.cognitivearts.com)
120 S. Riverside Plaza, Suite 1520
Chicago, IL 60606

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ClusterCats through proxy

[Dave Wilson]

Hi all,

I have a colleague who is looking advice for implementing ClusterCats whilst
behind a proxy server. They have no problems getting the failover to work,
but what happens is that the failover resolves to an internal IP which is
(obviously) inaccessible to the public users.

Quote from colleague
***
As described previously we are using two Enterprise servers, in a standard
primary/secondary configuration. If the primary fails then the secondary
will take over processing.

Can you give me an indication if you help us with the following

1) I want to be able to connect a client to the server through a proxy
server.
2) Then I want to "crash" the primary so that the secondary will take
over processing
3) The secondary will proceed to server live pages as normal

We have tried it over here, but we run into problems of DNS names. The live
customers site is worldwide so we were going to use IP address to connect to
the system. I know this is not the best solution but I'm open to another
other ideas, which do not entail a re-configuration of the network. When we
connect to the primary with an IP - no problems, however on failure, we do
get rolled over to the secondary but because the client is given a DNS name
it can't resolve it so it fails.
***
MY colleague is also running SQL server database, so I have suggested that
he simply move the two web servers to the public side of the proxy and
maintain the db connection through the proxy via dedicated switch, hence
protecting the data, which in essence is pretty much all that needs
protecting.


Does anyone have any better ideas for this?

TIA

Dave

Dave Wilson
Internet Technology Manager,
BizNet Solutions


Co-Founder CFUG Ireland
http://www.cfug.ie

224, Lisburn Road
Belfast BT9 6GE

Tel: 02890 225 776
Fax: 02890 223 223
web: http://www.biznet-solutions.com

email: [EMAIL PROTECTED]

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Re: virtualscape, digex, exodus, globix, and ClusterCats

[Cary Gordon]

This belongs on cf-community, where I am echoing my response.

First off, I can't say much about digex, but you seem to be comparing 
apples and oranges in that Virtualscape does CF hosting where Exodus and 
Globix are colo centers.  If you want hosting, you can check the list of 
Allaire partners on the site.  On the other hand, Exodus, who we work with 
extensively and Globix, who we may be working with soon, have nothing to do 
with CF.  They provide cages and/or racks, juice and a nice fat pipe along 
with a smorgasbord of assorted monitoring and backup options.

The advantage of integrating Local Director and ClusterCats is a more 
granular level of process monitoring.  That said, Local Director is a bit 
long in the tooth, technology-wise.  We are going with F5 and leaning 
towards Foundry Networks products in the near term.

If you are going for a hosted solution, I suggest that you try to get an 
idea of the hosts actual performance, as how you use equipment is at least 
as important as what the equipment is.

At 01:55 PM 5/8/00 -0500, you wrote:
>Does anyone have any recommendations or good/bad experiences with:
>
>  Virtualscape
>  Digex
>  Exodus
>  Globix
>
>We are trying to choose between them, and of the couple that I've spoken
>with so far, both claim to have much CF experience, both say they are
>Allaire partners, etc.
>
>A related question:  with hardware load balancing, do people still employ
>ClusterCats?  I know that Local Director and ClusterCats CAN be integrated
>(http://www.allaire.com/handlers/index.cfm?ID=15361) -- but do people do
>this in practice?  How much of an advantage does the integrated solution
>offer over Local Director alone?
>
>Finally, any opinions between Radware and Cisco's Local Director for load
>balancing, which is at least one distinguishing feature of the above hosts.
>
>Any advice/stories would be MUCH appreciated -- I have very little
>experience in this area.
>
>Thanks,
>
>Gregory M. Saunders, Ph.D.
>Senior Design Architect
>Cognitive Arts Corporation (http://www.cognitivearts.com)
>120 S. Riverside Plaza, Suite 1520
>Chicago, IL 60606
>
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>the body.


Cary Gordon
The Cherry Hill Company

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virtualscape, digex, exodus, globix, and ClusterCats

[Greg Saunders]

Does anyone have any recommendations or good/bad experiences with:

 Virtualscape
 Digex
 Exodus
 Globix

We are trying to choose between them, and of the couple that I've spoken
with so far, both claim to have much CF experience, both say they are
Allaire partners, etc.

A related question:  with hardware load balancing, do people still employ
ClusterCats?  I know that Local Director and ClusterCats CAN be integrated
(http://www.allaire.com/handlers/index.cfm?ID=15361) -- but do people do
this in practice?  How much of an advantage does the integrated solution
offer over Local Director alone?

Finally, any opinions between Radware and Cisco's Local Director for load
balancing, which is at least one distinguishing feature of the above hosts.

Any advice/stories would be MUCH appreciated -- I have very little
experience in this area.

Thanks,

Gregory M. Saunders, Ph.D.
Senior Design Architect
Cognitive Arts Corporation (http://www.cognitivearts.com)
120 S. Riverside Plaza, Suite 1520
Chicago, IL 60606

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