From: John Leach <john@johnleach.co.uk>
To: LVM general discussion and development <linux-lvm@redhat.com>
Subject: Re: [linux-lvm] the lvm shared storage question of the week
Date: Thu, 07 Aug 2008 19:22:09 +0100 [thread overview]
Message-ID: <1218133329.4013.20.camel@dogen.thepride.> (raw)
In-Reply-To: <489946F6.60706@squirk.org>
On Wed, 2008-08-06 at 08:38 +0200, Jean Spirat wrote:
Hi,
> > LVM manual briefly mentions CLVM (should apply equally well to debian):
> > http://www.redhat.com/docs/manuals/enterprise/RHEL-5-manual/Cluster_Logical_Volume_Manager/index.html
> >
> yes it just speak about it but there is no doc at all, nothing tells us
> if it listen on a tcp port or just communicate by using data on the disk
> or anything about the setup. Also it speak about special configuration
> in lvm.conf but nowhere i see WHAT should be configured :)
CLVM needs a distributed lock manager to work (which communicates over
the network, not via the disk). This is usually provided with the help
of the RedHat Cluster Suite.
>that it should use
>
>locking_type=2
>
>but is this enough ?
by default, locking type 2 or 3 requires clvmd, which as I say will
require a cluster setup of some kind.
You *can* work without a cluster manager but I'm not sure how advised it
is. So you leave your locking type as 1 and use "lvchange
--refresh /dev/vg/*" on all nodes to reload metadata from disk whenever
you make a change. Can be a bit risky.
John.
--
http://johnleach.co.uk
next prev parent reply other threads:[~2008-08-07 18:22 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-05 13:36 [linux-lvm] the lvm shared storage question of the week Jean Spirat
2008-08-05 15:20 ` Jonathan Brassow
2008-08-06 6:38 ` Jean Spirat
2008-08-07 18:22 ` John Leach [this message]
2008-08-08 8:39 ` Jean Spirat
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