From: "Greg Freemyer" <greg.freemyer@gmail.com>
To: omer@faruk.net,
LVM general discussion and development <linux-lvm@redhat.com>
Subject: Re: [linux-lvm] realtime snapshot or ?
Date: Fri, 19 May 2006 09:52:55 -0400 [thread overview]
Message-ID: <87f94c370605190652w64f92cfl91ea9bc3d59925a3@mail.gmail.com> (raw)
In-Reply-To: <1282.85.107.14.146.1146382053.squirrel@85.107.14.146>
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On 4/30/06, Omer Faruk Sen <omer@faruk.net> wrote:
>
> <snip>
>
> I have found that nbd ord drbd does similar things. But nbd just exports a
> block device (JUST ONE block device) so other machines can mount it. DRBD
> is closer to what I want but I can't mount drbd on secondary (backup
> machine) even as read-only
You should check out drbd 0.8 and see if it still has the same restriction.
0.8 is in beta or pre-release. It is supposed to allow "active/active"
environments. I believe a clustered FS like GFS is intended to be used with
the new functionality, but it may be that the slave can do a read-only
mount. If not, you could use GFS as your filesystem and achieve your goal.
The big trouble with that is locking. I'm pretty sure GFS only does file
locking. Not very helpful for a DB.
Greg
--
Greg Freemyer
The Norcross Group
Forensics for the 21st Century
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prev parent reply other threads:[~2006-05-19 13:53 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-30 7:27 [linux-lvm] realtime snapshot or ? Omer Faruk Sen
2006-05-19 13:52 ` Greg Freemyer [this message]
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