RE: Cluster Environment

2000-05-17 Thread Michael Paulsmeyer

Thanks Craig.

Mike.

-Original Message-
From: Craig Fisher [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, May 17, 2000 11:23 AM
To: [EMAIL PROTECTED]
Subject: RE: Cluster Environment




-Original Message-
From: Michael Paulsmeyer [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, May 17, 2000 10:40 AM
To: [EMAIL PROTECTED]
Subject: RE: Cluster Environment


Craig:

The text I quoted in the original post is from the very chapter you
suggested I read.


dooh.


So, let me get this straight, if a client with a host cookie hits a server
with domain-level cookies set it will then migrate that cookie to a
domain-level and set cfmagic (I love that name) so the other servers know
that that client now has a domain-level cookie.


Sounds straight to me.


What happens when, if by some freak event, that one client with a host-level
cookie hits the cluster and gets it's cookie migrated to domain-level, but
there exists another client with a domain-level cookie with that same
id/token combo?  Basically what I am trying to ask is what if two servers
hand out the same cfid/token. Can that happen?


You are only going to get one CFID/CFTOKEN set per domain so when the server
tried to migrate the host cookies it would see CFMAGIC and say "swell I'll
just use
these domain cookies right here!".

On your last question it is theoretically possible but pretty darn unlikely.

---
--pinners are all good, we already knew that.

--alpiners need to know that "To free the heel, means to free the mind!"
---

Granola heads.

"Dude, your ski is busted.  Oh! You meant it to do that?"

---
Mike.

-Original Message-
From: Craig Fisher [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, May 17, 2000 10:12 AM
To: [EMAIL PROTECTED]
Cc: Michael Paulsmeyer
Subject: RE: Cluster Environment


Mike:

Check out the documentation for the  tag.

Specifically the documentation for the SETDOMAINCOOKIES argument:

(here it is)

SETDOMAINCOOKIES

Optional. Yes or No. Sets the CFID and CFTOKEN cookies for an
entire domain not just a single host. Applications that are running
on clusters must set this value to Yes. The default is No.


and for even more fun read from chapter 12 of "Developing Web Applications
with ColdFusion" the section entitled "Managing Client State in a Clustered
Environment"


It's all good pinner!

--Craig





-Original Message-
From: Michael Paulsmeyer [mailto:[EMAIL PROTECTED]]
Sent: Monday, May 15, 2000 3:09 PM
To: [EMAIL PROTECTED]
Subject: Cluster Environment


Hello All,

My question is if two users hit a clustered site and both hit a different
server, could those servers create the same cfid/cftoken combination?
Asking this question because a client wants to move from session variables
to client variables and I want to assure him that this situation will not
happen or that if it does there are simple measures to take to resolve it.

Thanks In Advance,
Mike Paulsmeyer.


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CFERROR - MailTo

2000-05-10 Thread Michael Paulsmeyer

New to the list and I have been having a problem getting the mailto
attribute in the CFERROR tag to work.  I have set and verified the mail
server in CF Administrator.  What else can I look at and/or do?

Thanks In Advance,
Mike.

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RE: CFERROR - MailTo

2000-05-11 Thread Michael Paulsmeyer

Thanks Jerry,

For those of us who might not know how to create a self-submitting form
using JS could you point us in the right direction?

Mike.

-Original Message-
From: Jerry William Richardson [mailto:[EMAIL PROTECTED]]
Sent: Thursday, May 11, 2000 12:09 PM
To: [EMAIL PROTECTED]
Subject: RE: CFERROR - MailTo


One option is to have your cferror page be a self-submitting (using
javascript) form that takes all the different variables from the error that
are available and submits them to a cfm page that then e-mails you.

It's the long way around the barn. Please note that if you forward these
errors to a pager, they will inevitably only occur at 4:00 AM, cruelly
depriving you of sleep until you die from exhaustion.

Jerry Richardson
[EMAIL PROTECTED]

-Original Message-
From: Dave Watts [mailto:[EMAIL PROTECTED]]
Sent: Thursday, May 11, 2000 11:00 AM
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Subject: RE: CFERROR - MailTo


> New to the list and I have been having a problem getting the mailto
> attribute in the CFERROR tag to work.  I have set and verified the
> mail server in CF Administrator. What else can I look at and/or do?

I could be wrong about what exactly the problem is that you're having, but
my guess is that you fell into the same trap I did when I first used
CFERROR. That is, I thought that when I specified a MAILTO attribute, that
the CFERROR page would send an email to that address. That is not the case.
All setting the MAILTO attribute lets you do is use that attribute's value
as an error variable in the CFERROR page, so that you could do something
like this within that page:

mailto:#Error.MailTo#">Notify system administrator

It took me quite a while to figure that out, as I recall.

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


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RE: CFERROR - MailTo

2000-05-12 Thread Michael Paulsmeyer

Thank you Philip!

Cheers,
Mike.

-Original Message-
From: Philip Arnold - ASP [mailto:[EMAIL PROTECTED]]
Sent: Friday, May 12, 2000 3:44 AM
To: [EMAIL PROTECTED]
Subject: RE: CFERROR - MailTo


> For those of us who might not know how to create a self-submitting form
> using JS could you point us in the right direction?

2 methods I can think of...

in the onLoad part of the body
onLoad="document.myForm.submit()"

Or at the bottom of the page




If you want it to submit after a certain time, then put a setTimeout in the
 of the page to call a function which submits the page...





HTH

Philip Arnold
ASP Multimedia Limited
T: +44 (0)20 8680 1133

"Websites for the real world"

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Thanks RE: CFERROR - MailTo

2000-05-12 Thread Michael Paulsmeyer



-Original Message-
From: Jerry William Richardson [mailto:[EMAIL PROTECTED]]
Sent: Friday, May 12, 2000 7:35 AM
To: [EMAIL PROTECTED]
Subject: RE: CFERROR - MailTo


Here's what I use:





Error


function errorsubmit() {
document.forms[0].submit()
}




http://www.yoursitenamehere.com/errorhandler.cfm"
METHOD="POST" TARGET="_top">









Sorry

An error occurred when you requested this page. The Webmaster has been
notified of this error. We will work to correct the problem and apologize
for the inconvenience.



Then errorhandler.cfm adds an entry to my project management database,
e-mails me and (between the hours of 7 AM and 11 PM) pages me with the text
of the error that occurred.

Of course on your application.cfm file you will have the entry


Jerry Richardson
[EMAIL PROTECTED]



-Original Message-
From: Michael Paulsmeyer [mailto:[EMAIL PROTECTED]]
Sent: Thursday, May 11, 2000 5:33 PM
To: [EMAIL PROTECTED]
Subject: RE: CFERROR - MailTo


Thanks Jerry,

For those of us who might not know how to create a self-submitting form
using JS could you point us in the right direction?

Mike.

-Original Message-
From: Jerry William Richardson [mailto:[EMAIL PROTECTED]]
Sent: Thursday, May 11, 2000 12:09 PM
To: [EMAIL PROTECTED]
Subject: RE: CFERROR - MailTo


One option is to have your cferror page be a self-submitting (using
javascript) form that takes all the different variables from the error that
are available and submits them to a cfm page that then e-mails you.

It's the long way around the barn. Please note that if you forward these
errors to a pager, they will inevitably only occur at 4:00 AM, cruelly
depriving you of sleep until you die from exhaustion.

Jerry Richardson
[EMAIL PROTECTED]

-Original Message-
From: Dave Watts [mailto:[EMAIL PROTECTED]]
Sent: Thursday, May 11, 2000 11:00 AM
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Subject: RE: CFERROR - MailTo


> New to the list and I have been having a problem getting the mailto
> attribute in the CFERROR tag to work.  I have set and verified the
> mail server in CF Administrator. What else can I look at and/or do?

I could be wrong about what exactly the problem is that you're having, but
my guess is that you fell into the same trap I did when I first used
CFERROR. That is, I thought that when I specified a MAILTO attribute, that
the CFERROR page would send an email to that address. That is not the case.
All setting the MAILTO attribute lets you do is use that attribute's value
as an error variable in the CFERROR page, so that you could do something
like this within that page:

mailto:#Error.MailTo#">Notify system administrator

It took me quite a while to figure that out, as I recall.

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


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Cluster Environment

2000-05-15 Thread Michael Paulsmeyer

Hello All,

My question is if two users hit a clustered site and both hit a different
server, could those servers create the same cfid/cftoken combination?
Asking this question because a client wants to move from session variables
to client variables and I want to assure him that this situation will not
happen or that if it does there are simple measures to take to resolve it.

Thanks In Advance,
Mike Paulsmeyer.

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RE: Session vars in a clustered environment

2000-05-16 Thread Michael Paulsmeyer

One question Jay...

Is there any way that two users can hit two different servers (in a
clustered environment) and each server creates the same cfid/cftoken
combination?

Mike.

-Original Message-
From: Jay Sudowski - Handy Networks LLC [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, May 16, 2000 3:46 PM
To: [EMAIL PROTECTED]
Subject: Re: Session vars in a clustered environment


Howard,

I've never used session vars in a clustered server setup, but I've read a
lot about doing it, so here goes nothing :-)
>
>
> I've never worked with session variables on clustered servers.  I read
> somewhere ... and can't remember where ... that I might have a problem
here.

You can setup the clustering server to use Sticky Sessions - though, this
isn't a truely load balanced solution.  Using load balancing, the idea is
that the load will be distributed over all the servers in the cluster.  With
sticky sessions, that happens only to a certain extent - once a user is
assigned to a server, the user stays on the server, regardless of the load
so that the session vars are preserved.
>
> What I want to do is have my forms (as I mentioned in a previous post)
> transform form vars over a series of submissions into session vars and
then
> collect the session vars at the end for input into the db.
>
> But this app is going to live on a server cluster.  Can I still do this?

If you're using Sticky Sessions, it should be fine.
>
> What about client vars?
>
> Aren't session vars stored in RAM and client vars in the registry (unless
> otherwise specified)?  And because of that, aren't they confined to a
single
> machine?
>
Configure CF server to store client variables in a database - storing client
vars in the registry is a bad idea in any setup beacuse if the registry hits
its max size, all sorts of undesireable things will happen :-(.  In a
clustered setup, if you setup CF to store the cient vars in the db, they
should be accessble to all the servers in the cluster.

- Jay
> What are my alternatives?
>
> H.
>
> =
> Howard Owens
> Web Producer
> InsideVC.com
> mailto:[EMAIL PROTECTED]
> =
>
>
>
> --

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RE: Session vars in a clustered environment

2000-05-16 Thread Michael Paulsmeyer

Paul,

You can set up client management from the cfapplication tag and in the cf
server administrator you can create a db to hold client vars.  All servers
in the cluster need to know about the DB.

Create the WDDX packet as a client variable.

Now when you need to save state, put the data into a WDDX packet.  When you
need to get the data again, deserialize the packet.

Mike.

-Original Message-
From: paul smith [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, May 16, 2000 4:28 PM
To: [EMAIL PROTECTED]
Subject: Re: Session vars in a clustered environment


WDDX is an alternative to "Sticky Sessions"

The idea is to pass a WDDX packet back and
and forth in each page request.  This allows
pages displayed to a given user to be from
different web servers. Perhaps we can call
this "non-Sticky Sessions"  for short, or,
"Sessions_That_Aren't_Sticky_But_They_Maintain_State_Anyway"

This probably requires JS to enable each
link/page request to act as a form submit
and pass the WDDX packet as a hidden variable
back to the server.  I'd be interested if
anyone comes up with an alternative.

best,  paul


At 05:46 PM 5/16/00 -0400, you wrote:
>Howard,
>
>I've never used session vars in a clustered server setup, but I've read a
>lot about doing it, so here goes nothing :-)
> >
> >
> > I've never worked with session variables on clustered servers.  I read
> > somewhere ... and can't remember where ... that I might have a problem
>here.
>
>You can setup the clustering server to use Sticky Sessions - though, this
>isn't a truely load balanced solution.  Using load balancing, the idea is
>that the load will be distributed over all the servers in the cluster.
With
>sticky sessions, that happens only to a certain extent - once a user is
>assigned to a server, the user stays on the server, regardless of the load
>so that the session vars are preserved.


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RE: Session vars in a clustered environment

2000-05-17 Thread Michael Paulsmeyer

I have one question dealing with client variables.  The text at the end was
taken from CF Help.  I have a few questions...

1.  "If ID and token combinations already exist on each host in the cluster"
How does each server know of the existence of other cfid/cftoken
combinations on other servers?

2.  "common domain-level cookie"  Where exactly is this domain-level cookie
stored?  In the client variable repository? ie. registry or db

3.  If a client is smart enough to ask me if two servers can create the same
cfid/cftoken combination, am I supposed to say that CF 'magically' takes
care of it?

So, if anyone out there can explain exactly how this works I would greatly
appreciate it.

"ColdFusion 4.5 provides several client variable attributes in the
CFApplication tag that allow you to maintain application state across a
cluster when using server-side client variables. These attributes enable
client variable management and set CFID and CFTOKEN cookies at the domain
level (for example, .allaire.com). If ID and token combinations already
exist on each host in the cluster, ColdFusion migrates the host-level
cookies on each cluster member to the single, common domain-level cookie.
Following the setting or migration of host-level cookies to a domain-level
cookie, ColdFusion creates a new cookie (cfmagic) that tells ColdFusion that
domain cookies have been set.

This domain-level cookie allows a ColdFusion application to maintain
specific client information across a server cluster."


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RE: Session vars in a clustered environment

2000-05-17 Thread Michael Paulsmeyer

We are planning to not use session variables.  We will only be using client
variables.

Mike.

-Original Message-
From: David Berger [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, May 17, 2000 9:29 AM
To: [EMAIL PROTECTED]
Subject: RE: Session vars in a clustered environment


If you are using Session Variables in a clustered environment, you must
enable session aware load-balancing.  (forces the client not to be switched
between machines in the cluster, so the other machine(s) don't need to know
cfid/cftoken.)

>From: "Michael Paulsmeyer" <[EMAIL PROTECTED]>
>Reply-To: [EMAIL PROTECTED]
>To: <[EMAIL PROTECTED]>
>Subject: RE: Session vars in a clustered environment
>Date: Wed, 17 May 2000 08:49:11 -0600
>
>I have one question dealing with client variables.  The text at the end was
>taken from CF Help.  I have a few questions...
>
>1.  "If ID and token combinations already exist on each host in the
>cluster"
>How does each server know of the existence of other cfid/cftoken
>combinations on other servers?
>
>2.  "common domain-level cookie"  Where exactly is this domain-level cookie
>stored?  In the client variable repository? ie. registry or db
>
>3.  If a client is smart enough to ask me if two servers can create the
>same
>cfid/cftoken combination, am I supposed to say that CF 'magically' takes
>care of it?
>
>So, if anyone out there can explain exactly how this works I would greatly
>appreciate it.
>
>"ColdFusion 4.5 provides several client variable attributes in the
>CFApplication tag that allow you to maintain application state across a
>cluster when using server-side client variables. These attributes enable
>client variable management and set CFID and CFTOKEN cookies at the domain
>level (for example, .allaire.com). If ID and token combinations already
>exist on each host in the cluster, ColdFusion migrates the host-level
>cookies on each cluster member to the single, common domain-level cookie.
>Following the setting or migration of host-level cookies to a domain-level
>cookie, ColdFusion creates a new cookie (cfmagic) that tells ColdFusion
>that
>domain cookies have been set.
>
>This domain-level cookie allows a ColdFusion application to maintain
>specific client information across a server cluster."
>
>
>---
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RE: Cluster Environment

2000-05-17 Thread Michael Paulsmeyer

Craig:

The text I quoted in the original post is from the very chapter you
suggested I read.

So, let me get this straight, if a client with a host cookie hits a server
with domain-level cookies set it will then migrate that cookie to a
domain-level and set cfmagic (I love that name) so the other servers know
that that client now has a domain-level cookie.

What happens when, if by some freak event, that one client with a host-level
cookie hits the cluster and gets it's cookie migrated to domain-level, but
there exists another client with a domain-level cookie with that same
id/token combo?  Basically what I am trying to ask is what if two servers
hand out the same cfid/token. Can that happen?

--pinners are all good, we already knew that.

--alpiners need to know that "To free the heel, means to free the mind!"

Mike.

-Original Message-
From: Craig Fisher [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, May 17, 2000 10:12 AM
To: [EMAIL PROTECTED]
Cc: Michael Paulsmeyer
Subject: RE: Cluster Environment


Mike:

Check out the documentation for the  tag.

Specifically the documentation for the SETDOMAINCOOKIES argument:

(here it is)

SETDOMAINCOOKIES

Optional. Yes or No. Sets the CFID and CFTOKEN cookies for an
entire domain not just a single host. Applications that are running
on clusters must set this value to Yes. The default is No.


and for even more fun read from chapter 12 of "Developing Web Applications
with ColdFusion" the section entitled "Managing Client State in a Clustered
Environment"


It's all good pinner!

--Craig





-Original Message-
From: Michael Paulsmeyer [mailto:[EMAIL PROTECTED]]
Sent: Monday, May 15, 2000 3:09 PM
To: [EMAIL PROTECTED]
Subject: Cluster Environment


Hello All,

My question is if two users hit a clustered site and both hit a different
server, could those servers create the same cfid/cftoken combination?
Asking this question because a client wants to move from session variables
to client variables and I want to assure him that this situation will not
happen or that if it does there are simple measures to take to resolve it.

Thanks In Advance,
Mike Paulsmeyer.


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RE: Can I put a wddx packet into a database and read it back out?

2000-05-17 Thread Michael Paulsmeyer

Here you go...

In one template...








In the other template that you need to reference the array...




#myarray[1]#

I tested this with clientmanagement=yes in cfapplication tag and in cfserver
set a db for client variables, using MSAccess2000.

Mike.

-Original Message-
From: zknoll [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, May 17, 2000 9:12 AM
To: [EMAIL PROTECTED]
Subject: Can I put a wddx packet into a database and read it back out?



I have an 2-D array of information that I convert into a wddx packet to
pass between templates but I would also like to be
able to store the packet into a database and read it out again. A) Is
this possible? B) Is it possible with access 200 as the
backend database? C) If A and B are true can you show me a snippet of
code as to how this would be done?


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