From: Michael Monnerie <michael.monnerie@is.it-management.at>
To: xfs@oss.sgi.com
Subject: Re: XFS and XEN
Date: Thu, 5 Mar 2009 07:44:39 +0100 [thread overview]
Message-ID: <200903050744.39283@zmi.at> (raw)
In-Reply-To: <200902250740.43223@zmi.at>
On Mittwoch 25 Februar 2009 Michael Monnerie wrote:
> Q: Which settings are best with virtualization like VMware, XEN,
> qemu?
>
> The biggest problem is that those products seem to also virtualize
> disk writes in a way that even barriers don't work anymore, which
> means even a fsync is not reliable. Tests confirm that unplugging the
> power from such a system even with RAID controller with battery
> backed cache and hard disk cache turned off (which is save on a
> normal host) you can destroy a database within the virtual machine
> (client, domU whatever you call it).
>
> In qemu you can specify cache=off on the line specifying the virtual
> disk. For others I have no information what to do.
In as question 26 now
http://xfs.org/index.php/XFS_FAQ
mfg zmi
--
// Michael Monnerie, Ing.BSc ----- http://it-management.at
// Tel: 0660 / 415 65 31 .network.your.ideas.
// PGP Key: "curl -s http://zmi.at/zmi.asc | gpg --import"
// Fingerprint: AC19 F9D5 36ED CD8A EF38 500E CE14 91F7 1C12 09B4
// Keyserver: wwwkeys.eu.pgp.net Key-ID: 1C1209B4
_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs
next prev parent reply other threads:[~2009-03-05 6:45 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-17 8:59 XFS and XEN Michael Monnerie
2009-02-17 9:11 ` Christoph Hellwig
2009-02-17 14:00 ` Michael Monnerie
2009-02-19 19:35 ` Christoph Hellwig
2009-02-21 9:03 ` Michael Monnerie
2009-02-24 15:04 ` Michael Monnerie
2009-02-24 16:38 ` Christoph Hellwig
2009-02-25 6:40 ` Michael Monnerie
2009-03-05 6:44 ` Michael Monnerie [this message]
2009-03-03 20:56 ` Michael Monnerie
2009-03-04 2:42 ` Michael Monnerie
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=200903050744.39283@zmi.at \
--to=michael.monnerie@is.it-management.at \
--cc=xfs@oss.sgi.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.