[Gluster-users] not sure how to troubleshoot SMB / CIFS overload when using GlusterFS
landman at scalableinformatics.com
Mon Jul 18 01:02:24 UTC 2011
On 07/17/2011 08:56 PM, Ken Randall wrote:
> You may be asking, why am I asking here instead of on a Samba group, or
> even a Windows group? Here's why: My control is that I have a Windows
> file server that I can swap in Gluster's place, and I'm able to load
> that page without it blinking an eye (it actually becomes a test of the
> computer that the browser is on). It does not affect any of the web
> servers' in the slightest. My second control is that I have exported
> the raw Gluster data directory as an SMB share (with the same exact
> Samba configuration as the Gluster one), and it performs equally as well
> as the Windows file server. I can load the Page of Death with no
NTFS with SMB sharing caches everything. First page load may take a bit
of time, but subsequent will be running from data stored in RAM.
You can adjust SMB caching and Gluster caching as needed.
> I've pushed IO-threads all the way to the maximum 64 without any
> benefit. I can't see anything noteworthy in the Gluster or Samba logs,
> but perhaps I am not sure what to look for.
Not likely your issue. More probably its a Gluster cache size coupled
with some CIFS tuning you need.
> Thank you to anybody who can point me the right direction. I am hoping
> I don't have to dive into Wireshark or tcpdump territory, but I'm open
> if you can guide the way! ;)
You might need to strace -P the slow servers. Would help to know what
calls they are stuck on.
Joseph Landman, Ph.D
Founder and CEO
Scalable Informatics, Inc.
email: landman at scalableinformatics.com
web : http://scalableinformatics.com
phone: +1 734 786 8423 x121
fax : +1 866 888 3112
cell : +1 734 612 4615
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