[PVFS-users] PVFS + Rockscluster + dd = Cannot allocate memory

[Rob Ross]

Hey,

There are some minor performance implications, but this is a good 
solution.

Regards,

Rob

On Tue, 28 Sep 2004 jerome.borowiak at c-s.fr wrote:

> Found !
> 
> Here there is an answer found by a colleague...
> 
> Modify the /etc/modules.conf as :
> 
> options pvfs buffer=dynamic
> (default options is : options pvfs buffer=mapped)
> 
> And now the related question is : 
> 
> Does exist any consequence ???
> 
> Cu
> J.
> 
> ---- Messages d´origine ----
> De: Rob Ross <rross at mcs.anl.gov>
> Date: Dimanche, Septembre 26, 2004 2:03 am
> Objet: Re: [PVFS-users] PVFS + Rockscluster + dd = Cannot allocate memory
> 
> > Hi,
> > 
> > Could you give me versions for everything (kernel, pvfs)?  What 
> > hardware 
> > is this?
> > 
> > Thanks!
> > 
> > Rob
> > 
> > On Fri, 24 Sep 2004 jerome.borowiak at c-s.fr wrote:
> > 
> > > Hello Folks,
> > > 
> > > Helps !
> > > I am trying to use PVFS into Rocks 3.2 distro but something goes 
> > wrong.> 
> > > Config = 3 dedicated I/O servers including 1 machine for meta-server
> > > totally 2.8 To
> > > 
> > > Mounting and using PVFS works fine as shown above...
> > > 
> > > [root at tantale-0-5 jerome]# df -h
> > > tantale-1-0:/pvfs-meta
> > >                      2.8T  144G  2.7T   6% /mnt/pvfs
> > > 
> > > Copying files is working fine but the needed help resides here, 
> > when...> 
> > > [root at tantale-0-5 jerome]# pwd
> > > /mnt/pvfs/jerome
> > > 
> > > [root at tantale-0-5 jerome]# dd if=/dev/zero of=bidon count=1 
> > bs=8388608> 1+0 records in
> > > 1+0 records out
> > > 
> > > ... ok, it's working but now with 'bs' +1 ...
> > > 
> > > [root at tantale-0-5 jerome]# dd if=/dev/zero of=bidon count=1 
> > bs=8388609> dd: writing `bidon': Cannot allocate memory
> > > 1+0 records in
> > > 0+0 records out
> > > 
> > > ... no more working !
> > > 
> > > Any idea ?
> > > *ps = Using 'dd' into a NFS mount is working perfecly fine.
> > > 
> > > Help... one week on Google give nothing.
> > > 
> > > 
> > > _______________________________________________
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> > > PVFS-users at www.beowulf-underground.org
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> > > 
> > > 
> >
> 
>