The attached "multiop" test program is a toolbox that we use when writing unit tests for Lustre. It has a number of useful low-level operations e.g. lstat, open(O_DIRECTORY), mmap IO, etc and can optionally pause between operations waiting for a signal so that it is possible to coordinate the operations between multiple programs before some operation is done. Cheers, Andreas -- Andreas Dilger Sr. Staff Engineer, Lustre Group Sun Microsystems of Canada, Inc.