[Gluster-users] Slow unfs3 + booster

Justice London jlondon at lawinfo.com
Fri Sep 18 16:02:35 UTC 2009

I have tried both the 2.0.6 and 2.0.7rc3 releases. I also tried the git
repo version but there is some sort of an issue with lockups with it
right now so I'm just using the release version.

I am not modifying the wsize version on this particular mount as
unfortunately the way the server works does not allow to set options. I
don't expect it to run as fast as possible like that, but still it
should get more than Kilobytes/sec... megs or more are what I expect to

The servers are currently at the default slot entry numbers. I tried
increasing them to 128, which is what the NFS optimization guides out
there recommend and it only very slightly helps with the write speed.

I do have write-behind enabled. I just tried to disable it and see if
that made any difference. It went from ~600KB/sec write speed to

Justice London
jlondon at lawinfo.com

On Fri, 2009-09-18 at 09:29 +0530, Shehjar Tikoo wrote:
> Justice London wrote:
> > I am having issues with slow writes to a gluster replicated setup using
> > booster. on the order of about 800KB/sec. When writing a file to a fuse
> > mounted version of the same filesystem I am able to write of course many,
> > many times that speed. Has anyone gotten this to successfully work at this
> > point? If so, with what changes or configs? I have tried both the standard
> > and modified versions of unfs3.
> > 
> >  
> Do you have write-behind in the booster volfile?
> Which release of GlusterFS?
> With what wsize value are you mounting NFS server at the client?
> Preferable size is 64KiB but I think Linux client default is 32KiB.
> Use the -o wsize=65536 with the mount command to increase this value.
> Please tell me the output of:
> $ cat /proc/sys/sunrpc/tcp_slot_table_entries
> The default is 16 on Linux. Try increasing this to say 64 first, and
> then to 128. Do tell me if this increases the throughput.
> -Shehjar
> > 
> > Justice London
> > E-mail:  jlondon at lawinfo.com
> > 
> > 
> > 
> > 
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