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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: Thu, 9 Jul 2020 12:01:28 -0500	[thread overview]
Message-ID: <20200709170128.GB9029@redhat.com> (raw)
In-Reply-To: <f699b25f-4962-4b47-b0ab-9ab5c944a032@suse.com>

On Thu, Jul 09, 2020 at 08:44:23AM +0800, Gang He wrote:
> > 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.
> Sorry, I am a little confused.
> In the future, we can do online pvmove when VG is activated in shared mode?

I think it's unlikely, but possible if someone has interest.  I'd first
encourage them to think about new ways to solve the problem.

> from man page, I feel these limitations are temporary (or Not Yet Complete).

wording should probably change

> By the way, --lockopt option can help this situation? I cannot find the
> detailed description for this option in manpage.

No, lockopt is for some one-off special cases where we might need to work
around ordinary behaviors (like --nolocking.)  There's no workaround to
the problem that dm-mirror doesn't work under a shared LV.

Dave

      reply	other threads:[~2020-07-09 17:01 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-08  3:55 Gang He
2020-07-08 16:05 ` David Teigland
2020-07-09  0:44   ` Gang He
2020-07-09 17:01     ` David Teigland [this message]

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