There as a similar thread on this topic .Serach for "Session Management using EJB" probably that would help ..
> -----Original Message----- > From: Jan Zimmek [mailto:[EMAIL PROTECTED] > Sent: Wednesday, July 16, 2003 1:41 PM > To: [EMAIL PROTECTED] > Subject: [OT] Clustering / Session Replication > > > Hi, > > I read an article about clustering in tomcat on theserverside.com, but > have some questions about it. > > There is a statement to use "In-Memory"-Replication in favour of > "Database/Filesystem"-Replication to avoid problems like (speed, > external dependencies, ...). > > Most of our projects make use of gui-components like trees, pager and > pagecontrols, whose state are stored in the HttpSession-Object. > Depending on the project, the amount of used memory for these objects > can be really huge ( in a equivalent php version, a serialized session > can be up to 1mb ). > > Would this means, is that 200 concurrent HttpSessions ( each > one ~ 1mb ) > would be replicated to each Tomcat-Server in my cluster and therefore > each server requires ~ 200mb RAM to hold all concurrent > HttpSession-Objects when using "In-Memory"-Replication ? > > Are there any mechanisms to share those huge HttpSessions over several > servers without the needed RAM of ~200mb per server ? > > > Any comment would be really appreciated. > > > regards, > Jan Zimmek > >
