Hi,
we are trying to set up session replication using a database with the
PersistentManager and a JDBCStore.
Peter Rossbach stated that there is no alternative to multicasting. Is
it because the PersistentManager is only experimental?
And we have problems using the PersistentManager+JDBCStore because it
does not persist the session data when a request completed but only in
irregular intervals.
When you have several servers accessing the same replication store you
cannot be sure that your session data is up-to-date when one request is
served by server A and the next is served by server B.
I already asked for a solution for that problem in the posting "How to
configure session replication with a database" from 13.11.2006 10:01.
Regards
Achim
[EMAIL PROTECTED] wrote:
Hi,
I would also like hear more about this from horse mouths.
We are also need to replicate session where servers are spread across in
different countries.
Is there anyway we could use DB server for storing replication? Because
all the tomcat are using the same DB servers in my case.
With warm regards,
Mohan Narayanaswamy
ISCI,Standard Chartered Scope International,
3F, Asia Bldg,
#1, Haddows Road, Chennai
Ph: +91 98417 10021
Fonenet: (India) 550 - 16814
"Mirou, Antoine" <[EMAIL PROTECTED]>
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,
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 manage/monitor the cluster ?
Many questions, sorry, but I'm currently studying the possibility of
setting up a cluster of tomcat 5.5 for a 99.99% available app with lots of
user connexions, and I really don't feel confident of my ease with tomcat
clustering...
Thanks for your answers.
Regards,
Antoine
-----Message d'origine-----
De : Peter Rossbach [mailto:[EMAIL PROTECTED]
Envoyé : 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 you own membership service.
In the doc http://tomcat.apache.org/tomcat-5.5-doc/cluster-howto.html
It states "This is an algorithm that is only efficient when the
clusters are small."
I have 6 tomcat instances behind a load balancer, is this still
considered small?
Yes, but split your cluster into different domains. Use Apache/mod_jk
>= 1.2.19 with the
domain attribute. The mod_jk loadbalancer can then route to the right
backup.
regards
Peter
---------------------------------------------------------------------
To start a new topic, e-mail: users@tomcat.apache.org
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
