Fine grained control over the eviction policy

egeesken Apr 26, 2009 12:54 PM

Hi,
i am having a JBOSSPojoCache (3.0.0) running on an Oracle WebLogic Server 10.0MP1. The cache is local and there is no replication needed (at the moment). Everything works fine but i have different kinds of data in the cache, global data which is available for all users and user specific data.
I would like to define different eviction policies for the different kinds of data e.g. the country information (part of the global data) should stay in the cache for one day before getting outdated. The project information also part of the global data should stay in the cache for 5 hours before getting outdated.
The user specific data should stay in the cache for one hour.

I have found a hint about Region based marshaling, can anyone give me a short explanation (or a link) of how i can use this for defining more specific eviction policies.

Regards
Edmund

1. Re: Fine grained control over the eviction policy

manik May 5, 2009 5:55 AM (in response to egeesken)

Region based "marshalling" is not what you need, you just need to define separate regions. One for each data type which has unique eviction requirements. You can then define what these eviction requirements are on a per-region basis. The JBoss Cache User Guide has details on this, along with examples.

http://www.jboss.org/file-access/default/members/jbosscache/freezone/docs/3.0.3.GA/userguide_en/html/index.html
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2. Re: Fine grained control over the eviction policy

egeesken May 7, 2009 8:33 AM (in response to egeesken)

Hi, this article is interesting but i am using the POJO Cache and the documentation
"PoJo Userguide"

Another way to support multiple regions in eviction is to use region-based
marshalling. See the "Architecture" chapter in the JBoss Cache User Guide for
more information on region-based marshalling. When the Cache uses region-based
marshalling, POJO Cache will store internal node data on the region that is specified.
This allows for a more flexible eviction policy.

And I have no idea how I could configure this region based marshalling to extend my eviction policy.
Any idea?

Regards
Edmund
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