Hi,
I have upgraded FC5, and it's now much better.
For information, here is a bonnie++ test result, on gfs exported via
nfs, gigabit ethernet lan.
Version 1.01d ------Sequential Output------ --Sequential Input-
--Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block--
--Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP
/sec %CP
poisson 4G 21383 19 21582 6 4026 75 24101 21 22974 3
259.8 1
------Sequential Create------ --------Random
Create--------
-Create-- --Read--- -Delete-- -Create-- --Read---
-Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
/sec %CP
16 158 1 517 91 248 2 157 1 3243 22
238 2
Locally, the same test is more than twice faster.
Does someone knows if there are optimizations for gfs and nfs, other
than ones found in NFS Howto ?
Best regards,
Olivier
Olivier Thibault a écrit :
Hi,
Raj Kumar a écrit :
> Hi,
>
> We are using GFS6.0 (no cluster suite) and NFS exports of the file
system. I am getting a transfer rate of about 35MB/sec. We have a high
speed SAN. Actually the transfer rate can be little higher but we
attribute the slow rate to NFS itself since we see the same numbers for
EXT3 also.
>
> Regards,
> Raj
>
>
Thank you for your answer.
I am upgrading to last GFS/DLM/CMAN kernel stuff and will retry.
I've ran bonnie++ with ext3 exported over nfs and it is really speeder
even if it's not what i expected. I got about 22 MB/s (r/w).
But i saw that nfsd was consuming a lot of CPU. The system load was 15 !!
I've also ran test with Suse SLES9 xfs exported over nfs. I got 40MB/s,
which is what aim to get with GFS ...
I don't understand ...
Is there anybody who export gfs over nfs with FC5 ?
Thanks by advance
Olivier
On Tue, 30 May 2006 Olivier Thibault wrote :
Hi,
I am testing RHCS on Fedora Core 5.
I have a shared gfs volume mounted on two nodes (using clvmd and
lock_dlm).
Locally, everything is ok.
If I export the gfs volume via nfs, i obtain *very poor* performance.
For exemple, from a nfs client with dd, it take 90 seconds to create
a 16 MB file !!!
From the cluster's nodes, the performances a good, and i made some
tests exporting xfs over nfs, and it was good too.
So what's wrong with nfs+gfs ?
I would be very interested to know how guys who use this have
configured it, and what performances they have.
Thanks for any advices.
Best regards
-- Olivier THIBAULT
Laboratoire de Mathématiques et Physique Théorique (UMR CNRS 6083)
Université François Rabelais
Parc de Grandmont - 37200 TOURS
Tél: +33 2 47 36 69 12
Fax: +33 2 47 36 69 56
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