From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 14830] When other IO is running sync times go to 10 to 20
 minutes
Date: Thu, 4 Feb 2010 04:16:44 GMT
Message-ID: <201002040416.o144GiW0015911@demeter.kernel.org>
References: <bug-14830-13602@http.bugzilla.kernel.org/>
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http://bugzilla.kernel.org/show_bug.cgi?id=14830





--- Comment #17 from Michael Godfrey <godfrey@isl.stanford.edu>  2010-02-04 04:16:40 ---
I have now set deadline for all tests, and I had
a chance to try a system just like the one I have been
using, but with an 8.1T ext4 partition instead of the
11T partition before.

I used the same load:  rsync  /aaa /bbb, where /aaa was
NFS-mounted.
The behavior was quite similar, but the longest sync
time was about 4 minutes.

This suggests that the size of the filesystem is an
important factor.  Increasing the filesystem size by 36%
more than doubled the sync time.

Th size of the database in the 2 systems was somewhat larger
in the 11T system, but part of that was unused in the transfer.

Michael

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