6.4.5.6. FailoverChainer

FailoverChainer is similar to ConnectChainer, and attempts to connect to the destination defined by the router. However, if the destination is unreachable and the service uses DirectedRouter, Application-level Gateway attempts to connect to the next destination set in the router.

Tip

FailoverChainer can be used to implement a simple high availability support for the protected servers.

Configuring FailOverChainer

Figure 6.37. Configuring FailOverChainer

FailoverChainer has the following options:

Keep availability state for

Application-level Gateway does not try to connect to an unreachable server until the time set in the Keep availability state for option expires.

Connection timeout

Assume that the server is unreachable when it cannot be connected within the time set in the Connection timeout, specified in milliseconds.

Protocol action

It defines the type of the protocol used in the server-side connection. The default is to use the same protocol as on the client side, but PNS can enforce the use of TCP or UDP protocol.

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