A question on replication

[smith.gerry]

I have Infinispan 4.2 working on AS 4.2.3 (default config).

Our app is pretty intense and runs up to 150 times faster with infinispan, so we're excited about putting infinispan into production very soon.

I made an MBean which starts up Infinispan on server startup and initiates population of the cache - we need to maintain a representation of the full data set in the cache (no eviction), and the cache survives redeployment of the app.

I imagine we would have compatibility problems with the 'all' AS config, so for now we will just conigure HA with AJP, and replicate the cache across the cluster.

As soon as possible we'll migrate to AS 6, but we will have to do some refactoring, particularly because RUN-AS seems to have been broken since AS 5 for all but the simplest of apps.

My question is, when the cache manager is started on server startup, is there a way for my MBean to determine whether the cache will populate from the cluster, or if it's on it's own and must obtain it from the rdbms ?

Thanks,

Gerry

[mircea.markus]

You can determine the size of the cluster this way: cache.getAdvancedCache().getRpcManger().getTransport().getMembers() -> this will return the list of the members in the clusters. If this is empty you can safely assume that  you're the only member. Would that work for you?

[smith.gerry]

Yes, that'll work great.

Many thanks,

Gerry

[manik]

Also, re: compatibility problems with the "all" cfg, you may want to have a look at http://community.jboss.org/wiki/InfinispanasHibernate2nd-LevelCacheinJBossAS5x - while this isn't directly related to what you are doing, the author did experience similar compat problems wrt. libraries and dependencies, and he got around them using a specialised class loader.  The same technique may work well for you.

Further, the community would probably be very interested in how you got Infinispan working on JBoss AS 4.2.x and the performance improvements you've seen.  Would you be interested in contributing a short wiki article or a blog on it?

[smith.gerry]

Hi Manik,

OK thanks for that.

Yes, I'd be happy to,

Gerry

[manik]

Great.  Just create an article on the wiki and ping this thread with it for feedback