Re: [bgl-discuss] File descriptor limits?

[William Gropp <gropp@xxxxxxxxxxx>]

At 11:30 AM 3/14/2006, Robert Olson wrote:
> The mpiBLAST code is opening up a bunch of files on the nodes, and is
> apparently running into a 100 file descriptor limit.
>
> Is there a way to increase this?

Perhaps we can change what it is doing wrt file I/O.   Do you know why it 
is opening so many files?  Does each process open the same 
files?  Different files?

Bill


> I did find this at http://www.fz-juelich.de/zam/ibm-bgl/usage/FAQ/ V1R1M0 :
>
> > What are the user relevant improvements in BG/L software V1R1M0 ?
> >
> >
> > Optimized Allgather and Allgatherv in co-processor mode.
> > Increased file descriptor limit in ciodb to 2048.
> > Added support to allow running of multiple jobs on same partition
> > without reboot of either I/O or compute nodes. In particular, one
> > will be able to run a job in virtual node mode right afterrunning a
> > job in coprocessor mode.
> > Improve performance of core file generation.
>
> --bob
>
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William Gropp
http://www.mcs.anl.gov/~gropp 

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