It depends on your requirements. For read only load balancing to achieve more performance you might also consider to use replication:
http://gborg.postgresql.org/project/pgreplication/projdisplay.php This way you could for exapmle setup 4 instances of tomcat and 2 instances of postgreSQL where one db instance is shared by two tomcats. This is no true loadbalancing, but might give you enough power through the use of serveral db instances. The main drawbacks against true load balancing are: - no simple fail over (you would have to implement on your own) - no load based switching between databases. (The connectiones between the tomcat instances and the databases are rather static) You migh also read the following article http://conferences.oreillynet.com/presentations/os2002/johnson_darren.pdf with pointers to other replication solution to postgreSQL. > -----Original Message----- > From: Hawkeye I. King [mailto:[EMAIL PROTECTED] > Sent: Monday, February 24, 2003 11:39 AM > To: Tomcat Users List > Subject: Database load balancing? > > Does anyone have a clue about load balancing read-only > database requests to PostgreSQL? I'm developing a > data-intensive application that requires scalability, > not just from Tomcat, but from Postgres as well. > I will use hardware load balancing to Tomcat, but I cannot > do the same to a database using persistent connections. > > The only thing I've seen (after several days of searching) is > DBBalancer, an alpha release load balancer with no JDBC support. > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
