[OMPI users] Some Newbie questions

[Ashika Umanga Umagiliya]

Greeting all,

I am new to Open MPI and I have some newbie questions. I have given 4 
machines at our laboratory to set up Open MPI.Our net work is simply 
TCP/Ethernet running Debian Linux.


1) After installing OpenMPI on each machine ,do i need to run a 
service/daemon on each machine? (How does peers in MPI environment 
communicate ?)


2) After implementing parallel program , do I have to install the 
application on every machine ? (I thought the program automatically 
propagated to other peers , like in RMI applications? )




Thanks in advance,
Umanga

Re: [OMPI users] MX questions

[Scott Atchley]

On Jun 28, 2009, at 7:14 AM, Dave Love wrote:


Scott Atchley  writes:


George's answer supersedes mine. You must be using the MX bonding
driver to use more than one NIC per host.


Will that be relevant for Open-MX, which I'm using rather than normal
MX?  (I'm afraid I don't know anything about how MX systems work
generally.)  For what it's worth, just using two NICs with the BTL did
roughly double the bandwidth with one process per node.


No, you should just the bonding interface as you are doing.

Scott

Re: [OMPI users] MX questions

[Dave Love]

Scott Atchley  writes:

> George's answer supersedes mine. You must be using the MX bonding
> driver to use more than one NIC per host.

Will that be relevant for Open-MX, which I'm using rather than normal
MX?  (I'm afraid I don't know anything about how MX systems work
generally.)  For what it's worth, just using two NICs with the BTL did
roughly double the bandwidth with one process per node.