High Availability

The Benefits of a JAMS Failover Scheduler

In many instances, it is beneficial to ensure a secondary failover environment has been configured for the JAMS installation. The failover setup ensures there is a completely redundant instance of JAMS residing on a secondary server, often offsite, relying on a heartbeat connection between the two.

By default, this heartbeat is set to a sixty-second interval. If the secondary JAMS Scheduler server does not get a response from the primary JAMS Scheduler server within 3 consecutive beats, the secondary will take over as the primary JAMS Scheduler to ensure the schedule continues as expected.

JAMS Failover Architecture

The JAMS Failover Architecture should consist of at least three servers:

• JAMS Primary Scheduler Server
• JAMS Failover Scheduler Server
• JAMS Agent Server(s), where Jobs are run

If a failure occurs, the secondary JAMS Scheduler will take over for the primary JAMS Scheduler to ensure the schedule continues as expected. If Jobs are executing locally on the primary JAMS Scheduler server, a failure will cause all Jobs executing on the JAMS Scheduler server to fail. Running Jobs on JAMS Agent server(s) protects those Jobs from a primary JAMS Scheduler server failure.