[Lustre-discuss] Performance parameters

[Enrico Morelli]

On Fri, 06 Jun 2008 11:14:26 -0400
Mark Seger <Mark.Seger at hp.com> wrote:

> Is this writing to a single OST or mutliple ones?  If multiple ones
> I'd at least test each OST separately just to make sure one of them
> isn't slowing them all down.

The OSTs are four but are in the same server. I have used four
partition, on the same server, to create a single lustre filesystem. So
I don't know how run a test in each OST.

> Have you verified your interconnect is functioning correctly?

Yes, all works fine.

> -mark
> 
> Enrico Morelli wrote:
> > 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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