From: Les Mikesell <lesmikesell@gmail.com>
To: linux-lvm@redhat.com
Subject: Re: [linux-lvm] Snapshots and disk re-use
Date: Thu, 24 Feb 2011 13:25:16 -0600 [thread overview]
Message-ID: <4D66B09C.5000705@gmail.com> (raw)
In-Reply-To: <4D66AE68.6030406@rjl.com>
On 2/24/2011 1:15 PM, Nataraj wrote:
>
> One other thing that wasn't mentioned here.... As far as I understand,
> if these are lvms on the host and the snapshots are being taken on the
> host, there is no guaranteed integrity of the filesystems unless you
> shutdown the guest while the snapshot is taken.
>
> It's too bad they don't implement a system call that could do something
> like sync filesystem and sleep until I tell you to continue. This would
> be perfect for snapshot backups of virtual hosts.
Syncing a filesystem's OS buffers isn't really enough to ensure that
running apps have saved their data in a consistent state. The best you
are going to get without shuting things down is more or less what you'd
have if the server crashed at some point in time.
--
Les Mikesell
lesmikesell@gmail.com
next prev parent reply other threads:[~2011-02-24 19:25 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-23 12:36 [linux-lvm] Snapshots and disk re-use Jonathan Tripathy
2011-02-23 13:09 ` Joe Thornber
2011-02-23 13:57 ` Jonathan Tripathy
2011-02-23 14:16 ` Joe Thornber
2011-02-23 14:18 ` Jonathan Tripathy
2011-02-23 16:12 ` Ray Morris
2011-02-23 16:55 ` Jonathan Tripathy
2011-02-23 17:54 ` Stuart D. Gathman
2011-02-23 18:05 ` Jonathan Tripathy
2011-02-23 19:34 ` Stuart D. Gathman
2011-02-23 18:05 ` Stuart D. Gathman
2011-02-23 18:19 ` Jonathan Tripathy
2011-02-23 18:39 ` Les Mikesell
2011-02-23 19:39 ` Stuart D. Gathman
2011-02-23 20:03 ` Les Mikesell
2011-02-23 20:37 ` Stuart D. Gathman
2011-02-23 20:49 ` Jonathan Tripathy
2011-02-23 23:25 ` Stuart D. Gathman
2011-02-23 23:42 ` Stuart D. Gathman
2011-02-24 0:09 ` Jonathan Tripathy
2011-02-24 0:32 ` Stuart D. Gathman
2011-02-24 0:37 ` Jonathan Tripathy
2011-02-24 0:40 ` Jonathan Tripathy
2011-02-24 2:00 ` Stuart D. Gathman
2011-02-24 7:33 ` Jonathan Tripathy
2011-02-24 14:50 ` Stuart D. Gathman
2011-02-24 14:57 ` Jonathan Tripathy
2011-02-24 15:13 ` Stuart D. Gathman
2011-02-24 15:20 ` Jonathan Tripathy
2011-02-24 16:41 ` Jonathan Tripathy
2011-02-24 19:15 ` Nataraj
2011-02-24 19:25 ` Les Mikesell [this message]
2011-02-24 19:55 ` Stuart D. Gathman
2011-02-24 19:19 ` Stuart D. Gathman
2011-02-24 19:45 ` Stuart D. Gathman
2011-02-24 21:22 ` Jonathan Tripathy
2011-04-05 20:09 ` Jonathan Tripathy
2011-04-05 20:41 ` Stuart D. Gathman
2011-04-05 20:48 ` Jonathan Tripathy
2011-04-05 20:59 ` James Hawtin
2011-04-05 21:36 ` Jonathan Tripathy
2011-04-05 22:42 ` James Hawtin
2011-04-05 22:52 ` Jonathan Tripathy
2011-04-05 23:11 ` James Hawtin
2011-04-05 23:19 ` Jonathan Tripathy
2011-04-05 23:39 ` James Hawtin
2011-04-06 0:00 ` Jonathan Tripathy
2011-04-06 0:08 ` Stuart D. Gathman
2011-04-06 0:14 ` Jonathan Tripathy
2011-04-06 0:16 ` James Hawtin
2011-04-06 0:28 ` Jonathan Tripathy
2011-04-06 0:38 ` Stuart D. Gathman
2011-04-06 0:43 ` Stuart D. Gathman
2011-04-06 1:36 ` James Hawtin
2011-04-06 1:47 ` Jonathan Tripathy
2011-04-06 1:53 ` James Hawtin
2011-04-06 0:47 ` Jonathan Tripathy
2011-04-06 0:42 ` James Hawtin
2011-04-06 0:50 ` Jonathan Tripathy
2011-04-06 1:20 ` James Hawtin
2011-04-06 1:45 ` Jonathan Tripathy
2011-02-23 19:49 ` Nataraj
2011-02-23 19:24 ` Stuart D. Gathman
2011-02-23 19:07 ` [linux-lvm] Problem executing lvm related commands Tinni
2011-02-23 19:33 ` [linux-lvm] Snapshots and disk re-use Phillip Susi
2011-02-23 19:45 ` Stuart D. Gathman
2011-02-23 19:56 ` Nataraj
2011-02-23 13:18 ` Sunil_Gupta2
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4D66B09C.5000705@gmail.com \
--to=lesmikesell@gmail.com \
--cc=linux-lvm@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).