13. Clustering

Supports clustering of failover type to improve the fault tolerance. This function is only for administrator.
Select "Clustering" from left tree.


Failover Starting before is active server, starting after is standby server.
If active server stopped, standby server takes over the process.
Peer Server Enter IP address of each other for clustering.
Kirium Service Enter network interface that provides service.
Must match virtual IP address / subnet mask with peer server.
Session Synchronization Enter network interface that used to synchronize session of HTTP server.
Must match port with peer server.
Hearbeat Enter network interface that used to sending signal from active server to standby server.
Must match port with peer server.
Must Receive Timeout > Send Interval.
Must Send Interval > 1 and Receive Timeout > 2.
Server will switch when the timeout was detected three times.

Log at switching

In order to surely stop active server, standby server send stop command to active server.
If active server is already stopped at this time, following message will be output to error log.
This is normal process.
"Can not stop Kirium Mail Server (connect timed out)"

Image

Mail is delivered to active server during normal operation. when failure occurs in active server,
standby server takes over. At this time, Client can send and receive mail as usual
without conscious of the switching.(except during switching process)







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