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11/14/2006 08:09 PM
Please respond to Tomcat Users List
To: Tomcat Users List users@tomcat.apache.org
cc:
Subject:RE: session replication/tomcat 5.5
Hello
Am 13.11.2006 um 20:27 schrieb David O'Dell:
Is anyone using session replication in production?
Yes, at really big sites :-)
Is there an alternative to using multicasting?
No, but you can implement you own membership service.
In the doc
: mardi 14 novembre 2006 09:31
À : Tomcat Users List
Objet : Re: session replication/tomcat 5.5
Am 13.11.2006 um 20:27 schrieb David O'Dell:
Is anyone using session replication in production?
Yes, at really big sites :-)
Is there an alternative to using multicasting?
No, but you can implement
users@tomcat.apache.org
cc:
Subject:RE: session replication/tomcat 5.5
Hello,
Could you please give an example of really big sites ?
How do you organize your cluster (how many members/domains, ...) ?
Do you use Farm-deployer ?
Do you use session replication ?
How do you
From: Mark Hagger [mailto:[EMAIL PROTECTED]
Subject: Re: session replication/tomcat 5.5
99.99% gives you a whole 3153 mins per year, or 52 hours, or
1 hour per week of operation per year.
Your premise is well taken, but the math is a bit shaky. 99.99% uptime
per week equates to 1 minute
: mardi 14 novembre 2006 09:31
À : Tomcat Users List
Objet : Re: session replication/tomcat 5.5
Am 13.11.2006 um 20:27 schrieb David O'Dell:
Is anyone using session replication in production?
Yes, at really big sites :-)
Is there an alternative to using multicasting?
No, but you can
On Tuesday 14 November 2006 16:49, Caldarale, Charles R wrote:
Your premise is well taken, but the math is a bit shaky. 99.99% uptime
per week equates to 1 minute of downtime in that period, not one hour,
which emphasizes you point even more.
Ooops, how embarrassing, I calculated everything
As a case study, I have, in production, 4 Dell 2850 servers (running Red Hat
Enterprise V4.) Apache httpd on one, using JK for load balancing. The
other three are running Tomcat in a 3-way multicast cluster, multicasting
with replication on a private VLAN (192.168.x) The application accesses
Good to hear that someone is using this.
I want to try this out in my environment with 8 instances of tomcat each
with around 2,500 sessions per instance.
Does this sound feasible?
Also how do you monitor the cluster status?
Tim Lucia wrote:
As a case study, I have, in production, 4 Dell
with the vital MRTG graphs on display.
Tim
-Original Message-
From: David O'Dell [mailto:[EMAIL PROTECTED]
Sent: Tuesday, November 14, 2006 3:03 PM
To: Tomcat Users List
Subject: Re: session replication/tomcat 5.5
Good to hear that someone is using this.
I want to try this out in my
, 2006 4:29 PM
To: 'Tomcat Users List'
Subject: RE: session replication/tomcat 5.5
I forgot to mention that we peak at about 6000 sessions on the average day.
The all-time max for 2006 is 6810 sessions.
For monitoring, we do several things.
1) We use lambda probe
2) We use MRTG and some scripts
in the engineering
department visible to most of us with the vital MRTG graphs on display.
Tim
-Original Message-
From: David O'Dell [mailto:[EMAIL PROTECTED]
Sent: Tuesday, November 14, 2006 3:03 PM
To: Tomcat Users List
Subject: Re: session replication/tomcat 5.5
Good to hear
transforms the XML to HTML.
Regards,
Dan
-Original Message-
From: Tim Lucia [mailto:[EMAIL PROTECTED]
Sent: Tuesday, November 14, 2006 4:29 PM
To: 'Tomcat Users List'
Subject: RE: session replication/tomcat 5.5
I forgot to mention that we peak at about 6000 sessions on the
average day
PERFECT! Thanks to you and Dan Baumann...
-Original Message-
From: Rainer Jung [mailto:[EMAIL PROTECTED]
Sent: Tuesday, November 14, 2006 4:59 PM
To: Tomcat Users List
Subject: Re: session replication/tomcat 5.5
Have a look at:
http://yourserver:yourport/manager/jmxproxy?qry
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