--bob
On Mar 14, 2006, at 11:56 AM, William Gropp wrote:
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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