Date: Wed, 6 Aug 2014 11:40:59 -0500 From: Joseph Love <joe@getsomewhere.net> To: freebsd-fs@freebsd.org Subject: MooseFS client crash on FreeBSD 10 Message-ID: <7F032402-F79E-4AF7-90E9-DE90AA0E2D76@getsomewhere.net>
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Hi,
I=92ve been experimenting with MooseFS, trying to get a good impression =
of it=92s performance in my environment, but I=92ve been running into =
issues with the client running on FreeBSD 10 (system information =
towards the end of this email). Performance seems a bit dismal, but the =
big thing is that the mfsmount client eventually crashes:
pid 1004 (mfsmount), uid 0: exited on signal 6 (core dumped)
I=92ve tried both MooseFS 1.6.27 out of the ports collection as well as =
MooseFS 2.0 (provided by the MooseFS developers, as something to try).
I can definitely repeat the crash using iozone. The output in iozone =
ends like this:
16384 512 28179 63377 6005999 6037129 5984033 =
364032 3236019 369825 5940580 60282 405846 4500939 4482736
16384 1024 32297 58530 6122653 6079322 6014409 =
379364 3791669 351158 8752060 58609 412757 4326386 4543494
16384 2048
Error writing block 0, fd=3D 3
write: Input/output error
iozone: interrupted
Anyway, I=92m just hoping that someone might have an idea for =
determining if it=92s an issue with the FUSE module in FreeBSD 10, or =
something else going on with MooseFS. Or, just a well, if=20
someone has run into this issue and solved it!
I=92d normally just think it=92s a MooseFS thing, but it=92s obviously =
in the ports collection, and the MooseFS client running on a mac seems =
to work fine, and iozone reports better write (but not better random =
write) performance - some of which I think is caching.
System information:
3x Chunkservers & MooseFS Master: Dual Xeon 5500 series, 24gb memory, =
ZFS on root, ZFS dataset for MooseFS, 2x 1tb WD Se (in ZFS stripe), =
Intel S3500 SSD for ZIL. FreeBSD 10-Release-p7.
Client 1: FreeBSD 10-release-p7 in a VM. 4gb memory, 4 cores on an i7.
Client 2: (testing at different times than client 1) Mac OS 10.9.
If anyone has any ideas to try, I=92d love to hear them.
Thanks,
-Joe=
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