[OmniOS-discuss] Testing RSF-1 with zpool/nfs HA

[Michael Rasmussen]

On Thu, 18 Feb 2016 07:13:36 +0100
Stephan Budach <stephan.budach at JVM.DE> wrote:

> 
> So, when I issue a simple ls -l on the folder of the vdisks, while the switchover is happening, the command somtimes comcludes in 18 to 20 seconds, but sometime ls will just sit there for minutes.
> 
This is a known limitation in NFS. NFS was never intended to be
clustered so what you experience is the NFS process on the client side
keeps kernel locks for the now unavailable NFS server and any request
to the process hangs waiting for these locks to be resolved. This can
be compared to a situation where you hot-swap a drive in the pool
without notifying the pool.

Only way to resolve this is to forcefully kill all NFS client processes
and the restart the NFS client.

-- 
Hilsen/Regards
Michael Rasmussen

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