Re: Experience with FSFS

In all the FSFS benchmark discussion, I haven't seem many references to
file systems.
Does anyone have any experience (or even better, benchmarks) w/ FSFS on
various file systems. Of particular interest to me is ext3, ReiserFS,
XFS, and JFS.

Regards,
Nick G

Eric Gillespie <epg@pretzelnet.org>
Sent by: epg@gould.diplodocus.org
12/01/2004 05:46 PM
 
        To: users@subversion.tigris.org
        cc:
        Subject: Re: Experience with FSFS

Lukas Lipavsky <lukas.lipavsky@gmail.com> writes:

> But I would like to know...how stable and reliable is FSFS? Has anyone
> tested it on some big real project?

Absolutely. We've been using it on a small repository since
before 1.1.0, and once 1.1.0 came out we switched all our
repositories. In those two months we've had zero problems.
Previously, we averaged a wedge every other week.

> Are there any other problems?

Theoretically, yes. See
<http://svn.collab.net/repos/svn/trunk/notes/fsfs>. In practice,
fsfs has been faster across the board and the load average has
noticeably decreased on our servers.

> Any suggestions, comments, experiences?

Switch :).

Here are some numbers on our three main repositories, from
2004-10-01 to right now. The first repository was created brand
new and empty (as bdb) in July and now has over 15,000 revisions.
The second is largest in data size but isn't as active. The
second two are older, cvs2svn-converted repositories.

6936 revisions consisting of:
author count: 157
node adds: 6852
node mods: 20811
node deletes: 1461
revs per day: 110.095
adds per day: 129.283
mods per day: 330.333
deletes per day: 31.0851

516 revisions consisting of:
author count: 33
node adds: 88
node mods: 1499
node deletes: 23
revs per day: 8.74576
adds per day: 2.58824
mods per day: 25.4068
deletes per day: 2.09091

506 revisions consisting of:
author count: 33
node adds: 7582
node mods: 5338
node deletes: 176
revs per day: 8.43333
adds per day: 236.938
mods per day: 88.9667
deletes per day: 9.77778

-- 
Eric Gillespie <*> epg@pretzelnet.org
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