[jbosscache-dev] LRU Eviction policy question

Darshan Bildikar dbildikar at ipunity.com
Mon Jan 1 04:36:37 EST 2007


Hello All,

I'm new to JBoss cache and sorry if this question has already been asked
before. I tried to find answers on the list with no success. 

My problem is like this:-

I want to configure my cache such that 

1) It contains no more than 10K objects at any given time
2) An object remains in the cache (either in memory / PERSISTENT store) for
MAX 200 seconds. It must be automatically REMOVED from the cache after 200
seconds lapse.

I am using an LRU eviction policy with a File cache loader. I have the
following question. 

My region configuration looks like this

<region name="/test">
	<attribute name="maxNodes">10000</attribute>
	<attribute name="timeToLiveSeconds">100</attribute>
	<attribute name="maxAgeSeconds">200</attribute>
</region>

I assume that this means "Evict my object to persistent store if maxNodes >
10000 OR maxAgeSeconds > 200"

What I however want is: After 10000 entries any new entry it is serialized
to the persistent store. However, after 200 seconds (irrespective of whether
it's in the persistent store or in memory) it needs to be REMOVED from the
cache. Is there a configuration that will help me do this?

I'm sorry if this question has been asked before. Appreciate any pointers. 

BR
Darshan

Human beings, who are almost unique in having the ability to learn from the
experience of others, are also remarkable for their apparent disinclination
to do so 




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