Hello Mr. Squyres, Team,
I know you guys are busy. Any attention to my questions will be mostly appreciated.
Is there a FAQ for mtt? May be some of my Q have been answered before.
I intend to run mtt and test some performance over Infiniband. My setup is a 2-Dell uni-core machines (i.e.: sw160,sw170) running SLES10.0. Each host has an Infiniband HCA Card installed. Each HCA Card has 2 Physical ports which are assigned unique IP’s (i.e.: 220.127.116.11,18.104.22.168 and 22.214.171.124,126.96.36.199 respectively)
Ports are connected back-to-back (port1 <-> port1 and port2 <-> port2)
Q #1: Can I override INI file value for hostlist in command line? If yes, please provide example.
Q #2: In your opinion, what should I specify to hostlist in order to run mpi jobs over my Infiniband fabric?
Is it hostlist = sw160 sw170
Is it hostlist = 188.8.131.52 184.108.40.206 220.127.116.11 18.104.22.168
Q #3: How do I determine which Interfaces mpi uses?
Q #4: How can I determine max num of processes for my setup? In the case of hostlist = sw160 sw170 , mtt will evaluate max_np to 2.
In the case of hostlist = 22.214.171.124 126.96.36.199 188.8.131.52 184.108.40.206 , max_np will result to 4.
Q #5: I what terms can I ask mtt to use a local scratch directory on one of the host’ s hard drive as oppose to some shared scratch folder on Network file system.
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