[AIX HP-UX Linux Solaris Windows]

High Availability recovery strategy for failed servers

The recovery strategy dictates how Load Balancer behaves when one Dispatcher machine fails and there is another configured as a backup.

Two Dispatcher machines are configured: the primary machine, and a second machine called the backup. At startup, the primary machine sends all the connection data to the backup machine until that machine is synchronized. The primary machine becomes active, that is, it begins load balancing. The backup machine, meanwhile, monitors the status of the primary machine, and is said to be in standby state.

If the backup Load Balancer machine detects that the primary machine has failed, it performs a takeover load balancing functions and becomes the active machine. After the primary machine has once again become operational, the machines respond according to how the recovery strategy has been configured by the user.

There are two kinds of strategy:
Note: The strategy parameter must be the same for both machines.



Related tasks
Configuring high availability
Detecting server failures with heartbeats and reach targets
Scripts to run with high availability
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Last updatedLast updated: Jun 20, 2011 4:04:37 PM EDT
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