[mpich-discuss] Parallel File System

[Rob Ross]

Hi,

Real parallel I/O requires a parallel file system underneath, you can't just bake it into the app. You can use MPI-IO on NFS (with a list of caveats as long as my arm), but you really want a PFS. Otherwise you might as well write independent files or write only from rank 0.

-- Rob

On Feb 16, 2011, at 1:32 PM, "Hiatt, Dave M " <dave.m.hiatt at citi.com> wrote:

> <image001.gif>
> Is there a default parallel file system baked into MPICH so that MPI-IO is functional without Lustre, PVFS, or GFPS being installed independently on my cluster.  I’m getting a lot of pushback from my grid support group, telling me if I want parallel I/O I have to bake it into my app.  We write to an NFS mount disk farm.  Can I use MPI 1.2.1 out of the box and get parallel I/O through MPI IO?  For whatever reason I didn’t find this answer on the web site anywhere.  If I missed it, I apologize.
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