you should expect a clustered solution to have slightly more latency than an equivalently configured (with same commit option) non clustered solution: there is more communication. However by adding more servers you should be able to get higher throughput as well (again, with the same commit option).
I am not an expert on this!! I think there is a way to use commit option A with some kind of cache invalidation. My (possibly wrong) understanding of this is that it will give you "mostly correct" data: data may be out of date by the length of time it takes to send and process the invalidation message. I don't know if "double writes" are prevented or if you can use optimistic locking to prevent them. My understanding is that guaranteed correct reads can only be obtained with a distributed cache which is now under development. You should definitely check all of the above before relying on it. david jencks On 2003.03.04 11:15 Davide wrote: > Lennart Petersson wrote: > > Clustering means better availability, not necessarily better > performance. > > I though JBoss implemented Cluster for performance and scalability :-) > Anyway I don't want to be polemic, I was just wondering about a good > solution to > obtain availabilty and increase performance. > We added six more machines to obtain the same tx volume as one instance > with > caching enabled, but still if I look at one single tx timing is still > slower. > > > > If not > > JBoss commit option D will be ok, look at this Seppuku Pattern for > > ideas of a solution, possible to implement also in JBoss with some > > knowledge (JBossGroup may help you :) > > Thank you for the link, I read carefully all the Thread but actually, I > really > should write a portion of the container if I need transaction. > > Davide > > > > > > ------------------------------------------------------- > This SF.net email is sponsored by: Etnus, makers of TotalView, The > debugger > for complex code. Debugging C/C++ programs can leave you feeling lost and > > disoriented. TotalView can help you find your way. Available on major > UNIX > and Linux platforms. Try it free. www.etnus.com > _______________________________________________ > JBoss-user mailing list > [EMAIL PROTECTED] > https://lists.sourceforge.net/lists/listinfo/jboss-user > > ------------------------------------------------------- This SF.net email is sponsored by: Etnus, makers of TotalView, The debugger for complex code. Debugging C/C++ programs can leave you feeling lost and disoriented. TotalView can help you find your way. Available on major UNIX and Linux platforms. Try it free. www.etnus.com _______________________________________________ JBoss-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-user
