[Linux-cluster] NFS client failover

Dwight Hubbard dwight.hubbard at efausol.com
Mon Aug 31 03:35:01 UTC 2009

With clustered NFS the writes should be synchronous so they get committed to 
stable storage before the client gets confirmation the write completed.  As a 
result the write is on disk so there is no corruption after a reboot or 

On Wednesday 26 August 2009 01:55:24 am Mike Cardwell wrote:
> On 25/08/2009 20:40, Mike Cardwell wrote:
> > I figured that failover would happen more smoothly if the client was
> > aware of and in control of what was going on. If the IP suddenly moves
> > to another NFS server I don't know how the NFS client will cope with
> > that.
> Well, it seems to cope quite well. The nfs mount "hangs" for a few
> seconds whilst the IP moves from one server to another (unavoidable
> obviously), but it then picks up from where it was. I suspect there will
> be file corruption issues with files that are partially written when the
> failover happens, but I guess that can't be avoided without a client
> side solution.

Dwight Hubbard
Owner Effective Automation Solutions
Website: http://effectiveautomationsolutions.com
Email: dwight at dwighthubbard.com
Phone: (503) 941-0327
Redhat Certified Engineer - RHCE #804007137224095
VMware Certified Professional - VCP #18529

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