[Lustre-discuss] Performance parameters
Enrico Morelli
morelli at cerm.unifi.it
Fri Jun 6 08:06:30 PDT 2008
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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