A question about subprocess

[JD]

Hi,

I want send my jobs over a whole bunch of machines (using ssh). The
jobs will need to be run in the following pattern:

(Machine A)   (Machine B)  (Machine C)

Job A1             Job B1            Job C1

 Job A2           Job B2            etc

 Job A3          etc

 etc

Jobs runing on machine A, B, C should be in parallel, however, for
each machine, jobs should run one after another.

How can I do it with the subprocess?


Thanks,

JD