Re: [OMPI users] Question on checkpoint overhead in Open MPI

2010-07-22 Thread Nguyen Toan
Dear Josh, Thank you very much for the reply. I am sorry if my question was unclear, so please let me organize my question again. Currently I am applying the staging technique with the mca-params.conf setting as follows: snapc_base_store_in_place=0 # enable remote file transfer to global storage c

Re: [OMPI users] Question on checkpoint overhead in Open MPI

2010-07-16 Thread Josh Hursey
The amount of checkpoint overhead is application and system configuration specific. So it is impossible to give you a good answer to how much checkpoint overhead to expect for your application and system setup. BLCR is only used to capture the single process image. The coordination of the distr

Re: [OMPI users] Question on checkpoint overhead in Open MPI

2010-07-15 Thread Nguyen Toan
Somebody helps please? I am sorry to spam the mailing list but I really need your help. Thanks in advance. Best Regards, Nguyen Toan On Thu, Jul 8, 2010 at 1:25 AM, Nguyen Toan wrote: > Hello everyone, > I have a question concerning the checkpoint overhead in Open MPI, which is > the difference

[OMPI users] Question on checkpoint overhead in Open MPI

2010-07-07 Thread Nguyen Toan
Hello everyone, I have a question concerning the checkpoint overhead in Open MPI, which is the difference taken from the runtime of application execution with and without checkpoint. I observe that when the data size and the number of processes increases, the runtime of BLCR is very small compared