From: Alexandre DERUMIER <aderumier@odiso.com>
To: Sage Weil <sage@inktank.com>, Wido den Hollander <wido@widodh.nl>
Cc: ceph-devel@vger.kernel.org
Subject: Re: "rbd rm image" slow with big images ?
Date: Fri, 01 Jun 2012 06:38:10 +0200 (CEST) [thread overview]
Message-ID: <bbd69ec3-c889-402a-8c7d-a16487874b62@mailpro> (raw)
In-Reply-To: <Pine.LNX.4.64.1205311118150.28422@cobra.newdream.net>
>>That said, the current implementation is also stupid: it's doing a single
>>io at a time. #2256 (next sprint) will parallelize this to make it go
>>much faster (probably an order of magnitude?).
Ah, ok, this is why is see low ios/network during delete.
Thanks Sage and Wido for the explains, that's very clear!
----- Mail original -----
De: "Sage Weil" <sage@inktank.com>
À: "Wido den Hollander" <wido@widodh.nl>
Cc: "Alexandre DERUMIER" <aderumier@odiso.com>, ceph-devel@vger.kernel.org
Envoyé: Jeudi 31 Mai 2012 20:19:44
Objet: Re: "rbd rm image" slow with big images ?
On Thu, 31 May 2012, Wido den Hollander wrote:
> Hi,
> > Is it the normal behaviour ? Maybe some xfs tuning could help ?
>
> It's in the nature of RBD.
Yes.
That said, the current implementation is also stupid: it's doing a single
io at a time. #2256 (next sprint) will parallelize this to make it go
much faster (probably an order of magnitude?).
sage
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next prev parent reply other threads:[~2012-06-01 4:38 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <6bb4f478-37c9-460d-8a0d-698e32dcf08d@mailpro>
2012-05-31 7:12 ` "rbd rm image" slow with big images ? Alexandre DERUMIER
2012-05-31 18:15 ` Wido den Hollander
2012-05-31 18:16 ` Stefan Priebe
2012-05-31 19:39 ` Wido den Hollander
2012-05-31 18:19 ` Sage Weil
2012-06-01 4:38 ` Alexandre DERUMIER [this message]
2012-06-01 13:51 ` Guido Winkelmann
2012-06-01 20:33 ` Wido den Hollander
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