[mpich-discuss] Parallel I/O on Lustre: MPI Vs. POSIX

[George Zagaris]

Dear Rob,

Thanks for your feedback. I will try  MPICH2-1.4.

Best,
George


> ------------------------------
>
> Message: 6
> Date: Thu, 23 Jun 2011 10:45:09 -0500
> From: Rob Latham <robl at mcs.anl.gov>
> Subject: Re: [mpich-discuss] Parallel I/O on Lustre: MPI Vs. POSIX
> To: mpich-discuss at mcs.anl.gov
> Message-ID: <20110623154509.GG7708 at mcs.anl.gov>
> Content-Type: text/plain; charset=us-ascii
>
> I'm a little late to this discussion because I was on vacation.
>
> Most of the important points have been made already, but I would add
> a few comments:
>
> - The just-released MPICH2-1.4 has the latest updates for lustre.
>  It's a bit tricky to get good MPI-IO performance out of Lustre, but
>  MPICH2-1.4 encapsulates all the tricks the community knows about.
>
>  Other MPI-IO implementations sync up with MPICH2's MPI-IO
>  implementation, but it takes time to do so.  MPICH2 will always have
>  the latest fixes and improvements.  For example, we were
>  synchronizing in the close case unnecessarily.  1.4 does not do
>  that.
>
> ==rob