Fencing is the process of locking resource[1]s away from a node whose status is uncertain[2].
There are a variety of fencing techniques available.
One can either fence nodes[3] - using NodeFencing[4], or fence resources using ResourceFencing[5]. Some types of resources are SelfFencingResource[6]s, and some aren't damaged by simultaneous use, and don't require fencing at all.
SplitBrain[7], DunnsLaw[2], NodeFencing[4], ResourceFencing[5], FencingDaemon[8], SelfFencingResource[6], STONITH[9], Split-brain, quorum, fencing overview[10]
| [1] | http://www.linux-ha.org/resource |
| [2] | http://www.linux-ha.org/DunnsLaw |
| [3] | http://www.linux-ha.org/ClusterNode |
| [4] | http://www.linux-ha.org/NodeFencing |
| [5] | http://www.linux-ha.org/ResourceFencing |
| [6] | http://www.linux-ha.org/SelfFencingResource |
| [7] | http://www.linux-ha.org/SplitBrain |
| [8] | http://www.linux-ha.org/FencingDaemon |
| [9] | http://www.linux-ha.org/STONITH |
| [10] | http://techthoughts.typepad.com/managing_computers/2007/10/split-brain-quo.html |
This information provided courtesy of the Linux-HA project at http://linux-ha.org/