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
