STONITH ("Shoot The Other Node In The Head" or "Shoot The Offending Node In The Head"), sometimes called STOMITH ("Shoot The Other Member/Machine In The Head"), is a technique for fencing in computer clusters. STONITH was first released for Linux-HA but has since become available for other operating systems such as OpenBSD and Solaris.
Fencing is the isolation of a failed node so that it does not cause disruption to a computer cluster. As its name suggests, STONITH fences failed nodes by sending a message to remotely power down the failed node.
Multi-node error-prone contention in a cluster can have catastrophic results, such as if both nodes try writing to a shared storage resource. STONITH provides effective, if rather drastic, protection against these problems.
- Alan Robertson (2010). "Resource fencing using STONITH". IBM Linux Research Center.
- Definition from the Linux-HA Project
- STONITH Deathmatch Explained (and Some Hints for Resource Agent Authors and Systems Engineers)
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