[Symphony] Symphony + PVM - multiple slave nodes possible?

[Ted Ralphs]

Hi Tim,

You have to specify the number of slave nodes on the command line with
"-p". I don't recall the details any more, but I don't think it's
possible to detect the number of available hosts from  within the
application. By default, it will only use one slave.

Cheers,

Ted

On Wed, Apr 29, 2009 at 9:39 AM, Tim Graham <tsg7 at cornell.edu> wrote:
> Hi Ted,
>
> I am running this on Amazon EC2.  I have 3 machines: 1 master and two
> slaves.  I add the slaves by running:
>
> pvm> add <hostname>
>
> After that is finished I get the following configuration:
>
> pvm> conf
> conf
> 3 hosts, 1 data format
>                    HOST     DTID     ARCH   SPEED       DSIG
>  domU-12-31-39-00-E1-73    40000    LINUX    1000 0x00408841
> ec2-67-202-7-241.compute-1.amazonaws.com   100000    LINUX    1000 0x00408841
> ec2-174-129-120-69.compute-1.amazonaws.com   140000    LINUX    1000 0x00408841
>
> I then invoke
>
> ./symphony_m_tm_cp -F ~/model.mod -D ~/data.dat
>
> and eventually get the following output:
>
> [t100002] BEGIN
> done: 2 left: 1 ub: ?? lb: 160590.93 time: 6
> done: 3 left: 2 ub: ?? lb: 160590.93 time: 11
> [...]
>
> Using top, I see ~35% CPU usage on the first pvm host and 0% on the second.
>
> If I reverse the order of the hosts by deleting the first and
> re-adding it, I get the reverse result in terms of CPU usage so both
> hosts are definitely setup properly.
>
> I haven't tried any of the the test applications.
>
> Thanks for your help,
> Tim
>
>
> On Mon, Apr 27, 2009 at 10:17 PM, Ted Ralphs <ted at lehigh.edu> wrote:
>> Hi Tim,
>>
>> There shouldn't be anything special required to get this to work. Can
>> you provide a few more details of what you're doing? How are you
>> adding the additional hosts in PVM? What is the exact command line you
>> are using to launch SYMPHONY? Are you able to run any of the test
>> applications with multiple slave nodes? If you can provide a little
>> more detail, we should be able to get it working.
>>
>> Cheers,
>>
>> Ted
>>
>> On Thu, Apr 23, 2009 at 1:59 AM, Tim Graham <tsg7 at cornell.edu> wrote:
>>> Hi,
>>>
>>> I've compiled Symphony in the default distributed-memory configuration
>>> (with m_tm_cp and lp_cg executables).  This works on two nodes, but
>>> when a a second PVM host is added, only the first host is used.  Is it
>>> possible to run multiple slaves nodes?  I would expect that node
>>> processing could be done in parallel, but perhaps some other
>>> configuration option is needed?
>>>
>>> Thanks,
>>> Tim
>>>
>>> _______________________________________________
>>> Symphony mailing list
>>> Symphony at list.coin-or.org
>>> http://list.coin-or.org/mailman/listinfo/symphony
>>>
>>
>>
>>
>> --
>> Dr. Ted Ralphs
>> Associate Professor, Lehigh University (permanent)
>> Visiting Professor, Monash University (current)
>> (610) 628-1280
>> ted 'at' lehigh 'dot' edu
>> coral.ie.lehigh.edu/~ted
>>
>> Sent from Caulfield East, Victoria, Australia
>>
>



-- 
Dr. Ted Ralphs
Associate Professor, Lehigh University (permanent)
Visiting Professor, Monash University (current)
(610) 628-1280
ted 'at' lehigh 'dot' edu
coral.ie.lehigh.edu/~ted

Sent from Melbourne, Victoria, Australia