[Gluster-users] NFS export under Centos 5.3

Justice London jlondon at lawinfo.com
Thu Apr 16 15:56:15 UTC 2009

Well, I ended up finding that I had to mount with 'glusterfs' rather than
using a mount command to get this to work properly. Perhaps it was an error
on my part there, but I got it working in general.


The issue now is that when disabling direct-io it brings gluster from
at-disk speeds to a crawling 18-24M/s. This means when I want to export
through NFS it further slows things down, somewhere in the range of 4-7M/s.
Given that this is over gigabit Ethernet I should expect ~100M/s in good
conditions and when simply reading/writing plain files over NFS this is the
case. I did try unfs3 and turned back on direct-io and there are speed
increases, but even when using plain filesystem, unfs seems to only be able
to run about 24M/s tops. I'm not sure if this is an issue with the fuse
lib/module, but certainly if I want to do any real work over NFS this isn't
going to be a workable solution (either way, unfs or plain nfs with


Any further suggestions to get this working (different fuse library, etc.)
or at this point is this just how things will be with gluster+nfs?


Justice London
E-mail:  jlondon at lawinfo.com


From: Raghavendra G [mailto:raghavendra.hg at gmail.com] 
Sent: Tuesday, April 14, 2009 6:15 AM
To: Justice London
Cc: gluster-users at gluster.org
Subject: Re: [Gluster-users] NFS export under Centos 5.3



glusterfs has to be mounted with direct-io disabled for NFS re-export to
work properly. You can disable direct-io using --disable-direct-io option to


On Mon, Apr 13, 2009 at 11:06 PM, Justice London <jlondon at lawinfo.com>

Has anyone successfully gotten NFS exports of a gluster filesystem to work
properly? When the export is mounted, file-names and folders can be properly
created, but actually writing data to any of these files or folders results
in a permissions/write error. I can send out further details on configs,
etc. but perhaps someone has simply encountered this before and worked
around it.


Justice London
E-mail:  jlondon at lawinfo.com


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Raghavendra G

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