I attended a session at SHARE in Boston. SLES does have a high
availability option that might
help.
On 9/29/2010 5:34 AM, Alan Cox wrote:
What I want is to send a signal from the online server to the 'offline' server
to take over the disk, unmounts, offline and detach first.
NFS can sort of do this but if you are trying to do failover then its a
bit more complicated because
1. You may be in a situation where you switch because a box
crashes so you need to do disk recovery.
2. You need an environment where you can't accidentally have both
of them live
3. There are cases where you may see stale file handles as a
result of a failover where a client is using things like deleted but open
files.
Red Hat has out of the box NFS clustering and I'm pretty sure SuSE
likewise (as well as drbd support for live mirroring and cluster file
systems like GFS2 so you can have two live copies at once)
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