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Re: [Gluster-devel] Re: Strange behavior of AFR

From: gordan
Subject: Re: [Gluster-devel] Re: Strange behavior of AFR
Date: Wed, 21 May 2008 16:36:53 +0100 (BST)
User-agent: Alpine 1.10 (LRH 962 2008-03-14)

On Wed, 21 May 2008, Anton Khalikov wrote:

This may be to do with tthe posix locking. Currently posix lock server is
the first server in the AFR list (and the order of servers in AFR whould
be the same on all nodes, or else the locking won't work properly). When
the primary (lock) server goes away, all the locks disappear, too. There
was also another thread there discussing lock / metadata distribution
across the cluster with quorum locking. But that is also as yet

Do you mean posix-locks translator or what ? I don't use it by the way.

Yes. If you're not using it, then it can't be the underlying cause.

If it's timeout related, then yes, head-ing the images will solve the
problem. If it's lock related, it won't make any difference.

Yes it is timeout related. XEN tools as well as domU kernels try to
reach filesystem and their requests are blocked until resync is 100%
complete. It raises timeouts.

In that case, doing head -1 on the files in question before migrating the VM back should solve the problem.


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