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

BUT.... :) If you had a random access file (just integer offsets is all that is needed), combined with this journal, you could create a simple record based transaction db, and that could definitely be mapped. The key hash could be used to map to a block that would contain near entries. Clebert Suconic wrote: > Well .. ok.. it doesn' t fit on that at the moment. > > On 07/30/2009 12:29 PM, Jason T. Greene wrote: >> 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(a)jboss.org >>>> Lead, Infinispan >>>> Lead, JBoss Cache >>>> http://www.infinispan.org >>>> http://www.jbosscache.org >>>> >>>> >>>> >>>> >>> >> >> >