On Nov 15, 2007, at 5:48 PM, Mukuntan wrote:
> I am trying to use the rload( ) function call to load a file to a
> remote lam node location. Since I am using the function for a
> replication purpose I am concerned about the performance it may
> effect. So is the rload( ) function a blocking call ?? so that it
> make everything serialized ? or it is a non blocking call.
rload is a blocking call -- it will not return until the data has been
moved to the remote node (or the daemon says it's completed the move
-- it's pretty close to the same thing). It might be possible to send
the requests manually, rather than using the rload() command and get
some non-blocking behavior, but that might also lead to problems with
timing and flooding the UDP daemon transfer pipe (which can be
*really* bad to do), so I wouldn't recommend that course of action.
If you're worried about performance, rload is not the way to go -- it
was designed for basic file staging in a small environment.
Good luck,
Brian
--
Brian Barrett
LAM/MPI Developer
Make today a LAM/MPI day!
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