[MPICH] Setting the stripe size for a file using mpich2

Yu, Weikuan wyu at ornl.gov
Tue Aug 14 12:20:51 CDT 2007


But stripe size is a static number (64K) in PVFS2. It did not appear
customizable by clients to me. or I am not up-to-date on this matter?

--Weikuan

> -----Original Message-----
> From: owner-mpich-discuss at mcs.anl.gov 
> [mailto:owner-mpich-discuss at mcs.anl.gov] On Behalf Of Rajeev Thakur
> Sent: Tuesday, August 14, 2007 12:34 PM
> To: 'Christina Patrick'; mpich-discuss-digest at mcs.anl.gov
> Subject: RE: [MPICH] Setting the stripe size for a file using mpich2
> 
> You should be able to do it using the MPI_info key 
> "striping_unit" to set the stripe size in bytes and 
> "striping_factor" to set the number of I/O servers to stripe across.
> 
> Rajeev
> 
> > -----Original Message-----
> > From: owner-mpich-discuss at mcs.anl.gov 
> > [mailto:owner-mpich-discuss at mcs.anl.gov] On Behalf Of Christina 
> > Patrick
> > Sent: Monday, August 13, 2007 6:19 PM
> > To: mpich-discuss-digest at mcs.anl.gov
> > Subject: [MPICH] Setting the stripe size for a file using mpich2
> > 
> > Hi Everybody,
> > 
> > Is there any way I could set the stripe size of a file (created on a
> > pvfs2 filesystem) using MPICH2 hints or some other API. I 
> was looking 
> > through the source code of mpich2 and couldn't find any 
> such hint or 
> > does it have to be done using only pvfs API's?
> > 
> > I would appreciate your suggestions and help,
> > 
> > Thanks,
> > Christina.
> > 
> > 
> 
> 




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