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Re: [Gluster-devel] GlusterFS 1.3.0-pre2.3: AFR not working


From: Gerry Reno
Subject: Re: [Gluster-devel] GlusterFS 1.3.0-pre2.3: AFR not working
Date: Wed, 04 Apr 2007 09:56:13 -0400
User-agent: Thunderbird 1.5.0.10 (X11/20070302)

Yes, I think it is DRBD 0.8 that has this where you can mount both sides simultaneously. We are only using DRBD 0.7 right now and I'm looking to see if GlusterFS may be a more capable solution for us. Looking for better scalability. I've never had to work with the underlying devices in DRBD. Worse case I just forced a full sync. And I'm hoping that is the case with GlusterFS.

Gerry

Brent A Nelson wrote:
You can work with the underlying filesystem, say, to fix a problem, but you'd want to work with it the way GlusterFS would, at least for consistency. So, if it's a mirror, any change you make on one, you'd want to reproduce on the other.

With drbd, you could only have one mounted at any given time; otherwise, even mounting the other one would be something of a catastrophe. Note that this isn't true of recent, bidirectional drbds, if you run GFS.

Thanks,

Brent

On Wed, 4 Apr 2007, Gerry Reno wrote:

Avati,
Yes, of course, it works. So it is similar to DRBD where you must only interact via the exposed mounts and never directly to the underlying subsystem.

Gerry







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