By hstsao on Jun 08, 2004
We describe effort to make Blackboard SW highly availableStandard BB6.x has two tier setup, the front-end is based on apache and tomcate the back-end are oracle (an example) and NFS server.
To integrate with the Sun Cluster SW, one can use the HA-oracle agent to protect oracle, and HA-NFS agent to protect the NFS.
backendOne can setup a two node cluster and two Logical Hosts, one LH is responsible for HA-Oracle and one LH is responsible for HA-NFS, one node will own the LH for oracle and one node will own the LH for NFS.
front-endThe front-end can be protected by the HA-apache and HA-tomcate agent or just set up multiple front-end behind a Load Balancer (LB).
NFS failover is transparent to the clients.
Every time oracle failover to the other host, one need to restart the front-end's apache and tomcate.