From: Alex Elder <elder@inktank.com>
To: "ceph-devel@vger.kernel.org" <ceph-devel@vger.kernel.org>
Subject: [PATCH REPOST 0/3] rbd: no need for file mapping calculation
Date: Fri, 04 Jan 2013 08:51:48 -0600 [thread overview]
Message-ID: <50E6EC84.2060304@inktank.com> (raw)
Currently every osd request submitted by the rbd code undergoes a
file mapping operation, which is common with what the ceph file system
uses. But some analysis shows that there is no need to do this for
rbd, because it already takes care of its own blocking of image data
into distinct objects. Removing this simplifies things. I especially
think removing this improves things conceptually, removing a complex
mapping operation from the I/O path.
-Alex
[PATCH REPOST 1/3] rbd: pull in ceph_calc_raw_layout()
[PATCH REPOST 2/3] rbd: open code rbd_calc_raw_layout()
[PATCH REPOST 3/3] rbd: don't bother calculating file mapping
next reply other threads:[~2013-01-04 14:51 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-04 14:51 Alex Elder [this message]
2013-01-04 14:52 ` [PATCH REPOST 1/3] rbd: pull in ceph_calc_raw_layout() Alex Elder
2013-01-04 14:53 ` [PATCH REPOST 2/3] rbd: open code rbd_calc_raw_layout() Alex Elder
2013-01-04 14:53 ` [PATCH REPOST 3/3] rbd: don't bother calculating file mapping Alex Elder
2013-01-17 2:34 ` [PATCH REPOST 0/3] rbd: no need for file mapping calculation Josh Durgin
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