From: David Teigland <teigland@redhat.com>
To: Gang He <GHe@suse.com>
Cc: "linux-lvm@redhat.com" <linux-lvm@redhat.com>
Subject: Re: [linux-lvm] About online pvmove/lvresize on shared VG
Date: Wed, 8 Jul 2020 11:05:19 -0500 [thread overview]
Message-ID: <20200708160519.GA23533@redhat.com> (raw)
In-Reply-To: <HE1PR0402MB3514D6153AB2978268A015BDCF670@HE1PR0402MB3514.eurprd04.prod.outlook.com>
On Wed, Jul 08, 2020 at 03:55:55AM +0000, Gang He wrote:
> but I cannot do online LV reduce from one node,
> the workaround is to switch VG activation_mode to exclusive, run lvreduce command on the node where VG is activated.
> Does this behaviour is by-design? or a bug?
It was intentional since shrinking the cluster fs and LV isn't very common
(not supported for gfs2).
> For pvmove command, I cannot do online pvmove from one node,
> The workaround is to switch VG activation_mode to exclusive, run pvmove command on the node where VG is activated.
> Does this behaviour is by-design? do we do some enhancements in the furture?
> or any workaround to run pvmove under shared activation_mode? e.g. --lockopt option can help this situation?
pvmove is implemented with mirroring, so that mirroring would need to be
replaced with something that works with concurrent access, e.g. cluster md
raid1. I suspect there are better approaches than pvmove to solve the
broader problem.
Dave
next prev parent reply other threads:[~2020-07-08 16:05 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-08 3:55 [linux-lvm] About online pvmove/lvresize on shared VG Gang He
2020-07-08 16:05 ` David Teigland [this message]
2020-07-09 0:44 ` Gang He
2020-07-09 17:01 ` David Teigland
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