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The UKHA-ARCHIVE IS CEASING OPERATIONS 31 DEC 2024


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Clustered xPLHal





With xPLHal becoming more used and, therefore, more critical to the
operation of HA systems, does anyone think that a failover cluster
arrangement might be useful?

Some of the basics already exist - heartbeats, globals, etc.

I was thinking of an active/passive arrangement where the active
performs the tasks (scripts/determinators) and the passive is in
standby. Along with a heartbeat the active would send the current
values of the Globals. If after a preset period the standby has not
seen the heartbeats it takes over - at the same time announcing it
has become active. This is a typical 'shared none' arrangement with a
single heartbeat channel. Failback would be manual.

Any thoughts?

Merry Christmas!
Lehane








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