[infinispan-dev] Infinispan Persistence Manager and JBoss Messaging Journal

[Jason T. Greene]

The cache store is/can be a superset of the data in memory. So, for 
example, you may have 1G of data, but only 200M of memory. You can 
configure the memory part of the cache to be an LRU (data is never lost, 
just evicted from memory).

Even if the disk storage fits in memory, you likely don't want to load 
it right away if you dont have to (i.e. waiting on 2 gigs of disk to be 
read in)



Clebert Suconic wrote:
> On restarts, you can get the whole data back on the method load.
> 
> Eviction is probably a delete. so you probably don' t need to read the 
> Store for eviction.
> 
> 
> 
> 
> On 07/30/2009 12:16 PM, Manik Surtani wrote:
>>
>> On 30 Jul 2009, at 18:12, Clebert Suconic wrote:
>>
>>>
>>>> Yes - the cache store stores a superset of what is in memory. 
>>>> Overflow. So it still needs to be accessible in a random fashion, 
>>>> using a key.
>>>>
>>>> See the load() API on the CacheLoader interface.
>>>
>>>
>>> If the data is in memory, why do you need to recover it from the Store?
>>
>> Eviction. Restarts. Etc. :)
>>
>> -- 
>> Manik Surtani
>> manik at jboss.org
>> Lead, Infinispan
>> Lead, JBoss Cache
>> http://www.infinispan.org
>> http://www.jbosscache.org
>>
>>
>>
>>
> 


-- 
Jason T. Greene
JBoss, a division of Red Hat