From: Phillip Susi <psusi@cfl.rr.com>
To: device-mapper development <dm-devel@redhat.com>
Cc: Busby <chaimvy@gmail.com>
Subject: Re: create lvm2 snapshot will take a long time while large IO on origin lv(till large IO ends)
Date: Thu, 29 Apr 2010 13:31:16 -0400 [thread overview]
Message-ID: <4BD9C264.7040501@cfl.rr.com> (raw)
In-Reply-To: <w2ub8091bb41004282024i9ae427f7gf963baab82d811d0@mail.gmail.com>
On 4/28/2010 11:24 PM, Busby wrote:
> it seems the vgs suspend because the lvcreate cmd don't unlock the
> flock, but why the lvcreating of snapshot lv will be suspended while the
> origin is on big data IO?
Because when creating a snapshot it tries to flush any dirty buffers so
that the origin is in a consistent state at the time the snapshot is
created. This is done to minimize the chance that the filesystem on the
snapshot will be corrupt.
next prev parent reply other threads:[~2010-04-29 17:31 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-29 3:24 create lvm2 snapshot will take a long time while large IO on origin lv(till large IO ends) Busby
2010-04-29 17:31 ` Phillip Susi [this message]
2010-04-30 1:09 ` Busby
2010-04-30 14:39 ` Phillip Susi
2010-05-05 11:10 ` Busby
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