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

[Clebert Suconic]

We would need to make a few other implementations on the journal. Like.. 
we keep a list of records in memory, so we can quickly discount the 
counter and perform Garbage collection quickly of old files.

It is possible, but the Journal would become a new project, requiring 
more time. And I didn' t want it to become a Database.

I will keep this in mind.

On 07/30/2009 12:48 PM, Jason T. Greene wrote:
> 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 at jboss.org
>>>>> Lead, Infinispan
>>>>> Lead, JBoss Cache
>>>>> http://www.infinispan.org
>>>>> http://www.jbosscache.org
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>
>>>
>>
>
>