Transparent Checkpoint/Restart of Parallel LAM/MPI Applications
			Andrew Lumsdaine
		       Indiana University
		   http://www.osl.iu.edu/~lums/


Prof. Lumsdaine heads the Pervasive Computing Lab at IU and is
the architect of LAM MPI.


Abstract

As high-performance clusters continue to grow in size and popularity,
issues of fault tolerance and reliability are becoming limiting
factors on application scalability.  To address these issues, we
present the design and implementation of a system for providing
coordinated checkpointing and rollback recovery for MPI-based parallel
applications.  Our approach integrates the Berkeley Lab BLCR
kernel-level process checkpoint system with the LAM implementation of
MPI through a defined checkpoint/restart interface.  Checkpointing is
transparent to the application, allowing the system to be used for
cluster maintenance and scheduling reasons as well as for fault
tolerance.  Experimental results show negligible communication
performance impact due to the incorporation of the checkpoint support
capabilities into LAM/MPI.