Terracotta Discussion Forums (LEGACY READ-ONLY ARCHIVE)

Hi!

We are running a pretty active community site with 1,6 million users that makes heavy use of caching. So far we have been using OsCache but would really like to switch to EhCache since we are running into performance issues and there has not been any active development of OsCache for years.

Unfortunately, there are two issues with EhCache that block the migration.
While we managed to workaround for testing, this is not acceptable for production.

(1)
Broken JGroups replication fails to work with decorated caches.
According to Jira this issues has been recently fixed: https://jira.terracotta.org/jira/browse/EHC-383
Why not release version 1.4 of the jgroups module with this fix?

(2)
Missing support for what you call "group tags" (OSCache: "cache groups").
This issues has also come up in the forum: http://forums.terracotta.org/forums/posts/list/4298.page
Are there any plans to do the merge mentioned in the above post are is this going to be part of the new "search" functionality you announced to beta in November? http://forums.terracotta.org/forums/posts/list/4322.page
I can see how key searching could be used to emulate group tags, at least as long the key-tag mapping is unary. Searching all keys to do group operations probably negates the very idea of this mapping in terms of performance.

It would be great to know the roadmap for these issues/releases, it is getting increasingly difficult to convince the management to wait out any longer for these issues to be resolved.

Thanks,
Lasse

Hi, the JGroups release is waiting on ehcache-core-2.3. It includes some new config thus the dep. This will be out in a few weeks.

The groups stuff is underway and there is a patch for it but we have not rolled it into a release yet.

Thanks for the prompt reply.

Good to hear about the pending EhCache + JGroups releases, looking forward for that one.

Is the patch for the cache groups available anywhere so I could go ahead and give it a spin? For which release is this planned? I think this is rather significant feature to add to Ehcache.

I just attached the patch to the following JIRA and raised the JIRA to "Critical"

https://jira.terracotta.org/jira/browse/EHC-240

It would be great if you can give this a road test. It is based on work from Andrew Liles that has been running in prod in London for about a year, applied to current trunk by Cedric Lime.

I have directed their attention to your interest. It would be great if we can continue this discussion on that JIRA. I have subscribed to updates.

Hi, the Ehcache Search is now out in alpha. You can give it a go. See http://ehcache.org/documentation/search.html