Thanks Craig.  Have you noticed how JCS deals with threading?  Is thread
synchronization implemented in JCS or do you do your own synchronization?

-----Original Message-----
From: Craig Johannsen [mailto:[EMAIL PROTECTED] 
Sent: Friday, October 10, 2003 2:19 PM
To: Turbine JCS Users List
Subject: Re: general question on JCS


Hi Carl,

I would think it is fine to use JCS almost anywhere you need caching. It can
be configured to be relatively light weight if needed.

At Ludicorp, we are using JCS for a massively multi-player online game
(http://www.gameneverending.com).  The game is still in development, but
beta testers have been using it for as long as 20 days without a reboot and
without any sign of a memory leak.  Ultimately, we plan to support hundreds
of thousands of simultaneous users, probably several thousand very active
users per server machine.  So, eventually, our app will be 
heavy duty.
Game players exercise a game server more intensely than web users exercise a
web server.  For example, there is more object updating going on and also we
are pushing events to the game client quite frequently.

JCS is used in Hibernate, which is fairly popular, though I don't know of a
specific heavy duty commerical app that uses it.

JBoss Group has recently said they would incorporate Hibernate into their
project, so I wonder if that means they will include JCS as well. (?)

Cheers,
Craig

Sjoquist, Carl wrote:

>Greetings
>The website positions JCS as a "front-tier" cache.  Is there any reason 
>that JCS also can't be used in the app tier as well?  What is the 
>general policy for thread sync in JCS?  Is JCS generally free threaded, 
>i.e. not thread safe? Also, I'd be interested to hear about people 
>doing any kind of heavy-duty, commercial app use of JCS.  I'm trying to 
>determine where things are in terms of stability, reliability, et al...
>Thanks much
>C
>
>from the website:
>JCS is a front-tier cache that can be configured to maintain 
>consistency across multiple servers by using a centralized remote 
>server or by lateral distribution of cache updates. Other caches, like 
>the Javlin EJB data cache, are basically in-memory databases that sit 
>between your EJB's and your database. Rather than trying to speed up 
>your slow EJB's, you can avoid most of the network traffic and the 
>complexity by implementing JCS front-tier caching. Centralize your EJB 
>access or your JDBC data access into local managers and perform the 
>caching there.
>
>  
>


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