From: Wido den Hollander <wido@42on.com>
To: Jason Dillaman <dillaman@redhat.com>
Cc: ceph-devel@vger.kernel.org
Subject: Re: Speeding up rbd_stat() in libvirt
Date: Wed, 6 Jan 2016 16:31:50 +0100 [thread overview]
Message-ID: <568D3366.3050104@42on.com> (raw)
In-Reply-To: <780342854.4132479.1451921916433.JavaMail.zimbra@redhat.com>
On 04-01-16 16:38, Jason Dillaman wrote:
> Short term, assuming there wouldn't be an objection from the libvirt community, I think spawning a thread pool and concurrently executing several rbd_stat calls concurrently would be the easiest and cleanest solution. I wouldn't suggest trying to roll your own solution for retrieving image sizes for format 1 and 2 RBD images directly within libvirt.
>
> Longer term, given this use case, perhaps it would make sense to add an async version of rbd_open. The rbd_stat call itself just reads the data from memory initialized by rbd_open. On the Jewel branch, librbd has had some major rework and image loading is asynchronous under the hood already.
>
I created a issue for this: http://tracker.ceph.com/issues/14264
Would be nice to have in librbd.
Wido
prev parent reply other threads:[~2016-01-06 15:31 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-28 13:48 Speeding up rbd_stat() in libvirt Wido den Hollander
2016-01-04 15:38 ` Jason Dillaman
2016-01-04 15:59 ` Wido den Hollander
2016-01-06 15:31 ` Wido den Hollander [this message]
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