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Re: [Gluster-devel] proposals to afr


From: Kevan Benson
Subject: Re: [Gluster-devel] proposals to afr
Date: Mon, 22 Oct 2007 10:50:39 -0700
User-agent: Thunderbird 2.0.0.6 (X11/20070728)

Alexey Filin wrote:
I understand it, I say about configuration when afr master node crashes
before close() (it's indifferent is afr master on glfs slave or on glfs
server node), in such a situation replicas can be inconsistent but afr
version xattr is the same (old) on all replicas. To discover the
inconsistency without minor version xattr it is required e.g. to calculate
checksum of all replicas or to use workarounds like modification time check
misbehaving in some cases.

Oh, I'm all for the AFR minor version. I'm just leery of the benefits of having a separated journal when the AFR minor version suggestion you had seemed so elegant to me. I don't know what a separated journal would give you that the minor version wouldn't and the minor version is more distributed and robust.

--

-Kevan Benson
-A-1 Networks




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