Maybe splitting the load using virtual machines may help. Instead of running 24 dspace instances on one machine, use something like 2 virtual machines with 12 instances on each or 4 and 6, 3 and 8, etc.
cachiusa wrote: > Dear all, > I am looking for solution for 24 Dspace for 24 communities run on 1 server. > Which solution I should choose: > > 1) 24 instances of Tomcat, one for each Dspace instance, or > 2) One Tomcat for 24 Dspace instances. > > I choose second solution by following the link > http://www.nabble.com/Changing-DB-Name-%C2%BFhow--td19053520.html > and already finished installation. But my server is broken if I try to > access 24 DSpace at the same time (it is ok to open 12 Dspace). > > Some sites show error: > java.lang.OutOfMemoryError: PermGen space > > The others return errors: > java.io.FileNotFoundException: > /usr/local/gmseenet/partners/gmseenet/dspace/webapps/jspui/WEB-INF/web.xml > (Too many open files) > > or: > org.apache.jasper.JasperException: Unable to compile class for JSP > > I already set heap memory for Tomcat to 2048 by > JAVA_OPTS="-Xmx2048M -Xms64M -Dfile.encoding=UTF-8", but I still face the > same problem. > > I have to run 24 DSpace in 1 machine, so what is solution for me? > Please help me. Thanks in advance. > Best, > Cachiusa > > > Robin Taylor-2 wrote: > >> Hi Mika, >> >> For what it is worth, we currently run 5 Dspace instances in the same >> Tomcat >> without any problems. Using Tomcat manager allows us to stop/start/deploy >> one instance without affecting the others. We are running on a Sun/Solaris >> v240. We run an Apache Webserver in front of Tomcat to avoid the user >> having to append 8080 to the URL. We allocate 2G of memory to Tomcat, my >> understanding is that Tomcat doesn't like having more although that may be >> just a vicious rumour. We did investigate the possibility of separating >> the >> Dspace's into different virtual machines or into different instances of >> Tomcat on the same machine, but came to the conclusion that we would be >> introducing a layer of complexity and increased maintenance for no real >> gain. >> >> Cheers, Robin. >> >> >> >> >> >> >> >> -- >> The University of Edinburgh is a charitable body, registered in >> Scotland, with registration number SC005336. >> >> >> -----Original Message----- >> From: [EMAIL PROTECTED] >> [mailto:[EMAIL PROTECTED] On Behalf Of Mika >> Stenberg >> Sent: 08 April 2008 12:38 >> To: '[email protected]' >> Subject: [Dspace-tech] Hardware used in DSpace repositories >> >> We are planning to centralize all DSpace instances used in our University >> into one server. Eventually a total of 5-6 individual DSpace instances >> would >> end up running on the same platform, either on virtualized OS's or simply >> distributed on different ports. >> >> What I'd be interested in, is to learn the your experiences on the issue >> and >> acquire the following info from other members of the community: >> >> 1) How many instances of DSpace does your institution run and >> what kind of hardware (CPU, memory, disk space & OS) are they >> running on? >> >> 2) How many items are stored in your repository? >> >> 3) Have you experienced any performance issues with your >> repositories using the hardware described above? >> >> >> You can reply directly to me by e-mail at mika.stenberg(at)helsinki.fi. >> If other parties are interested on summary, I will be happy to provide it. >> >> Thanks for the input, >> >> Mika Stenberg >> University of Helsinki >> Finland >> >> ------------------------------------------------------------------------- >> This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Register >> now and save $200. Hurry, offer ends at 11:59 p.m., Monday, April 7! Use >> priority code J8TLD2. >> http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javao >> ne >> _______________________________________________ >> DSpace-tech mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/dspace-tech >> >> >> >> ------------------------------------------------------------------------- >> This SF.net email is sponsored by the 2008 JavaOne(SM) Conference >> Don't miss this year's exciting event. There's still time to save $100. >> Use priority code J8TL2D2. >> http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone >> _______________________________________________ >> DSpace-tech mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/dspace-tech >> >> >> > > ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ DSpace-tech mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/dspace-tech
