Re: [Beowulf] Python libraries slow to load across Scyld cluster

2015-01-15 Thread Skylar Thompson
Do any of your search paths (PATH, PYTHONPATH, LD_LIBRARY_PATH, etc.) include a remote filesystem (i.e. NFS)? This sounds a lot like you're blocked on metadata lookups on NFS. Using "strace -c" will give you a histogram of system calls by count and latency, which can be helpful in tracking down the

[Beowulf] Python libraries slow to load across Scyld cluster

2015-01-15 Thread Don Kirkby
I'm new to the list, so please let me know if I'm asking in the wrong place. We're running a Scyld Beowulf cluster on CentOS 5.9, and I'm trying to run some Django admin commands on a compute node. The problem is that it can take three to five minutes to launch ten MPI processes across the four