From: fengguang tian (fernyabc_at_gmail_dot_com)
Date: Thu Mar 11 2010 - 21:12:44 PST
Hi,Paul I am using Open MPI now, and, yes, It works now, thank you. can i set a directory to store the checkpoint file(context.XXXXX), i saw these files are all in the program directory by default. and also, how to restart the checkpoint with the file context.XXXXX in the program automatically? Is it possiable that when the a running process crashed, the program restart automatically with the checkpoint file? BTW, is there any documents that introduce the usage of all these functions in the BLCR library, I cannot find any documents talks about that. Cheers! fengguang On Thu, Mar 11, 2010 at 11:42 PM, Paul H. Hargrove <PHHargrove_at_lbl_dot_gov>wrote: > fengguang tian wrote: > >> Hi >> >> my question is similar to this question: >> http://www.nersc.gov/hypermail/checkpoint/0283.html >> >> what head file I should include in my c program. when I write a program >> follow the advice:http://www.nersc.gov/hypermail/checkpoint/0732.html >> >> it doesn't work. >> >> *I want to implement checkpoint into a MPI c++ program ,and checkpoint the >> process periodically and automatically.* >> > > If you want to write code like entry 0732 in the mail archive you'll want > to #include "libcr.h" and link with "-lcr". > > BLCR does not directly handle checkpointing of communications, such as used > in MPI. Instead, BLCR provides mechanisms for an MPI implementation to > participate in the checkpoint, in order to capture the state of > communications. Therefore, in order to use BLCR with an MPI application, > you will need to be using one of the MPI implementations that have > integrated with BLCR. Of the commonly used MPI's both Open MPI and MVAPICH2 > include BLCR integration. You should consult the documentation for > whichever MPI you use to determine how to configure it for use with BLCR. > Then you will also find in the MPI implementation-specific documentation > some information on how the application can trigger a checkpoint. > > -Paul > > -- > Paul H. Hargrove PHHargrove_at_lbl_dot_gov > Future Technologies Group Tel: +1-510-495-2352 > HPC Research Department Fax: +1-510-486-6900 > Lawrence Berkeley National Laboratory >