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[Linux-cluster] Fence device, How it work




I tend to use APC AP7900 as fence device.

So when failover have occure backup node control APC to power cycle failnode.
But im not sure how kind of  this device work .
Is it  just power off or power cycle at outlet that fail node was pluged ?
If so failnode was shutdown or reboot uncleanly ? (look like no ups when have no power)
Im afraid of data corrupt may occur.

Or cluster manager instruct failnode to shutdown before instruct APC to power cycle ? ( So it reboot or shutdown cleanly)

Nattapon,
Regards

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