ACFS recomandations for weblogic cluster

Question

Hi,
Can some one help me to findout material(step by step) for ACFS usage with weblogic clustering.
Originally I started thread here :
Re: ACFS recomandations for weblogic cluster
Thanks in advance for valuable time
Datla

Answer 1

The first question you need to ask yourself is for what purpose do i need this type of filesystem when using a WebLogic Cluster?
The first which comes to mind is the migration of so-called singleton service, such as JMS Servers, persistence stores and JTA.
For example, when a machine fails, we must bring the services, running on the failed machine, up on other machines. The JTA
service plays a critical role in recovery from a failure scenario where transactions are involved. In-flight transactions can hold locks
on underlying resources. If the transaction manager is not available to recover these transactions, resources may hold on to these
locks for a long time. This makes it difficult for an application to function properly. JTA service migration is possible only if the server's
default persistent store (where the JTA logs are kept) is accessible to the server to which the service will migrate.
This where a shared storage mechanism comes into play - to store files which need to be accessible from every server. The concept
of ACFS which is useful in this scenario is the mount model (http://download.oracle.com/docs/cd/E14072_01/server.112/e10500/asmfilesystem.htm#CACJGEAC)
To set-up a mount point you can follow the steps presented here: http://download.oracle.com/docs/cd/E15051_01/wls/docs103/cluster/service_migration.html#wp1049463
This link contains the steps in order to configure JMS migration: http://download.oracle.com/docs/cd/E15051_01/wls/docs103/cluster/service_migration.html#wp1065826
This link contains the steps in order to configure JTA migration: http://download.oracle.com/docs/cd/E15051_01/wls/docs103/cluster/service_migration.html#wp1054024