[Lustre-discuss] Performance parameters

Enrico Morelli
Fri, 06 Jun 2008 15:06:30 -0000

On Fri, 06 Jun 2008 10:52:17 -0400
"Brian J. Murrell" <Brian.Murrell at Sun.COM> wrote:

> On Fri, 2008-06-06 at 16:45 +0200, Enrico Morelli wrote:
> > Dear all,
> >
> > which are the parameters that I can set to improve the
> > lustre performance?
> >
> > Because I have very worse performance using lustre 1.6.4.3.
> > An ''ls'' on a directory containing 1000 files gets
30s (on a NFS
> > filesystem the same ''ls'' gets 0.3s)
> >
> > The same for a file creation/copy.
> > On lustre:
> > # time dd if=/dev/zero of=test.txt bs=1k count=1024000
>                                      ^^^^^
> Try increasing the block size to 1M.

On lustre:
 time dd if=/dev/zero of=test.txt bs=1M count=1024
1024+0 records in
1024+0 records out

real    0m21.260s
user    0m0.000s
sys     0m1.600s

On NFS:
time dd if=/dev/zero of=test.txt bs=1M count=1024
1024+0 records in
1024+0 records out

real    0m2.561s
user    0m0.006s
sys     0m1.698s


>
> What interconnect are you using between your client and servers?
>

Its has a giganet nic card (are new HP DL 380/360G5) interconnected
through a switch HP Procurve using network cable class 7 (1 mt
length). I can transfer files via network at 30MB/s.

> b.
>


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