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.: 11.4.3.160,12.4.3.160
and 11.4.3.170,12.4.3.170 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 = 11.4.3.160 12.4.3.160
11.4.3.170 12.4.3.170
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 = 11.4.3.160 12.4.3.160 11.4.3.170 12.4.3.170
, 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.
Shai Venter
Q.A
Mellanox Technologies, Ltd.
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