Re: Linux Cluster using shared scsi

Jonathan Lundell
2001-05-03T22:32:59Z

At 3:57 PM -0400 2001-05-03, Eric Z. Ayers wrote:
>However distateful it sounds, there is precedent for the
>behavior that Doug is proposing in commercial clustering
>implementations. My recollection is that both Compaq TruCluster and
>HP Service Guard have logic that will panic the kernel when a disk is
>"stolen" from under a running service and there is a "network
>partition" in the cluster.
>
>A network partition occurs when multiple machines in the cluster are
>runnig, but the HA software agents on two nodes can't communicate via
>the network to arbitrate which node should be the owner of the disk.

There are also the more extreme STONITH and STOMITH [shoot the other
node/machine in the head] required by some shared filesystems (eg
GFS).

http://linux-ha.org/stonith.html
http://sistina.com/gfs/howtos/gfs_howto/STOMITH__IO_Fencing.html
--
/Jonathan Lundell.