JBoss clustering does load-balanching for ejb types. EB's and SFSB's are "sticky" for performance reasons.
But all home invocations and SLSB invocations are round-robin by default. IN JBoss 3.0.x CMP does not have a distributed cache. So you would need to use commit 'B'. Hire us, we'll help you out. Bill > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED]]On Behalf Of > Emerson Cargnin - SICREDI Serviços > Sent: Wednesday, October 16, 2002 3:43 PM > To: [EMAIL PROTECTED] > Subject: Re: [JBoss-dev] [JBoss-user] capacity planning to use jboss > > > other unrelated point : > > We'll use web layer at the bank offices to avoid wasting band, so : is > there a way to use load-balance at the ejb layer??? > because I think that modjk does it just for http request, am I right?? > > lsanders wrote: > > Some additional comments: > > > > 1) If a hardware load balancer is out of the budget (Cisco > local director series > > start at about $4000 - not too expensive), then I would > recommend looking at > > "Linux Virtual Server" (http://www.linuxvirtualserver.org/). > It is basically a > > customized Linux kernel to do the same stuff as the hardware solution. > > 2) We do not want to use clustered http sessions, because > frankly our sessions > > are too damn bloated (yeah - we need to fix that, but alas > there is only so much > > time in a day). I was thinking about a way to cluster just > enough session info > > to preserve login context, but to ignore the rest of the junk > that is not needed > > (most of the our http session info is just database cache that > can be recreated > > as needed). Basically, the clustered servers would only share > > session-id/login-id pairs. I haven't spent any time actually > working on this, > > but I would love to hear comments. Might this be useful to others? > > > > -Larry > > > > > > > >>- You'll probably want to buy some Hardware based HTTP load-balancer for > >>your web traffic. Make sure it supports "sticky" sessions. You can try > >>Apache + modjk + AJP13 if you want a cheap software solution. Jetty and > >>Tomcat can be hooked in. > >> > >>- Do you require HTTP Session replication and failover? If its ok for a > >>user to relogin after a failover, I suggest not using JBoss clustering > >>features at all, (Except for net boot and maybe farming). > >> > >>- On the performance tests I ran(ECPERF), replication had a 10% hit on > >>performance for 2 boxes running in a cluster. You'll probably have more > >>than 2 boxes(but not much more). > >> > >>- I suggest marrying the WEB and EJB layer into one > JVM/process. You'll get > >>better performance. > >> > >>- Next what you have to do is guess peak traffic. Multiply > that number by 2 > >>just to be safe. > >> > >>- Next you'll need to write a stress test program > >> > >>- Next you'll need to hire JBossGroup to help you out with all > of this. :) > >> > >>- Next you'll need to purchase a high quality support contract from > >>JBossGroup to iron out any problems you may have :) > >> > >>At Mercantec we had 2 dual 900mhz CPU running Linux and JBoss, > 1 dual 900Mgz > >>PIII running Oracle. We could support traffic from 10K merchants. But > >>that's our application. How many users your app can support on a given > >>piece of hardware is totally dependent on the type of application you're > >>running. > >> > >>DON'T USE CLUSTERING UNLESS YOU HAVE TO! > >> > >>Bill > >> > >> > >> > >> > >> > >> > >>>-----Original Message----- > >>>From: [EMAIL PROTECTED] > >>>[mailto:[EMAIL PROTECTED]]On Behalf Of > >>>Emerson Cargnin - SICREDI Serviços > >>>Sent: Wednesday, October 16, 2002 11:59 AM > >>>To: [EMAIL PROTECTED] > >>>Subject: [JBoss-dev] [JBoss-user] capacity planning to use jboss > >>> > >>> > >>>Today i got a question from my manager (i work in a bank, there will be > >>>a web layer at the bank office and a central ejb layer) : > >>> > >>>"Emerson, how many boxes in the ejblayer do we need to support 800 > >>>offices and more than 4000 simultaneous clients (from the offices). > >>>Imagine that you have available any number of xeon dual 2mhz with 2giga > >>>RAM connected through a gigabit lan, how many boxes of this kind do we > >>>need?" > >>> > >>>I confess that i exitated a little. This is a though question, > indeed. I > >>>think that CMP and mainly clustering will not have the same gain when > >>>you have too many nodes in the cluster, given the communication needed > >>>among the nodes to keep the data replicated. > >>> > >>>Does any one have any parameter for a capacity plan for a scenario like > >>>this? jboss group, any clue ?? > >>> > >>>What could be the limit beetwen number of nodes and > replication overhead? > >>> > >>>Thanks in advance for any answer : ) > >>> > >>> > >>>-- > >>>xxxxxxxxxxxxxxxxxxxxxxxxxxxx > >>>| Emerson Cargnin | > >>>| Analista de Sistemas Sr. | > >>>| Tel : (051) 3358-4959 | > >>>| SICREDI Serviços | > >>>| Porto Alegre - Brasil | > >>>|xxxxxxxxxxxxxxxxxxxxxxxxxx| > >>> > >>> > >>> > >>>------------------------------------------------------- > >>>This sf.net email is sponsored by: viaVerio will pay you up to > >>>$1,000 for every account that you consolidate with us. > >>>http://ad.doubleclick.net/clk;4749864;7604308;v? > >>>http://www.viaverio.com/consolidator/osdn.cfm > >>>_______________________________________________ > >>>JBoss-user mailing list > >>>[EMAIL PROTECTED] > >>>https://lists.sourceforge.net/lists/listinfo/jboss-user > >>> > >>> > >>> > >>> > >>>------------------------------------------------------- > >>>This sf.net email is sponsored by: viaVerio will pay you up to > >>>$1,000 for every account that you consolidate with us. > >>>http://ad.doubleclick.net/clk;4749864;7604308;v? > >>>http://www.viaverio.com/consolidator/osdn.cfm > >>>_______________________________________________ > >>>Jboss-development mailing list > >>>[EMAIL PROTECTED] > >>>https://lists.sourceforge.net/lists/listinfo/jboss-development > >> > >> > >> > >>------------------------------------------------------- > >>This sf.net email is sponsored by: viaVerio will pay you up to > >>$1,000 for every account that you consolidate with us. > >>http://ad.doubleclick.net/clk;4749864;7604308;v? > >>http://www.viaverio.com/consolidator/osdn.cfm > >>_______________________________________________ > >>Jboss-development mailing list > >>[EMAIL PROTECTED] > >>https://lists.sourceforge.net/lists/listinfo/jboss-development > >> > > > > > > > > > > ------------------------------------------------------- > > This sf.net email is sponsored by: viaVerio will pay you up to > > $1,000 for every account that you consolidate with us. > > http://ad.doubleclick.net/clk;4749864;7604308;v? > > http://www.viaverio.com/consolidator/osdn.cfm > > _______________________________________________ > > Jboss-development mailing list > > [EMAIL PROTECTED] > > https://lists.sourceforge.net/lists/listinfo/jboss-development > > > > > -- > xxxxxxxxxxxxxxxxxxxxxxxxxxxx > | Emerson Cargnin | > | Analista de Sistemas Sr. | > | Tel : (051) 3358-4959 | > | SICREDI Serviços | > | Porto Alegre - Brasil | > |xxxxxxxxxxxxxxxxxxxxxxxxxx| > > > > ------------------------------------------------------- > This sf.net email is sponsored by: viaVerio will pay you up to > $1,000 for every account that you consolidate with us. > http://ad.doubleclick.net/clk;4749864;7604308;v? > http://www.viaverio.com/consolidator/osdn.cfm > _______________________________________________ > Jboss-development mailing list > [EMAIL PROTECTED] > https://lists.sourceforge.net/lists/listinfo/jboss-development ------------------------------------------------------- This sf.net email is sponsored by: viaVerio will pay you up to $1,000 for every account that you consolidate with us. http://ad.doubleclick.net/clk;4749864;7604308;v? http://www.viaverio.com/consolidator/osdn.cfm _______________________________________________ Jboss-development mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-development
