>>> >>>1. run simultaneously from each node. Will this model RAC? >>>or does orion always read/write from the same part of the >>>disk. Does orion play nice when overlapped like this? Will >>>it be better if the tests are staggered? The offsets are not coordinated. That doesn't really matter that much though, really. Just make your fileset so large that it reduces the likelihood of a clobber. But, honestly, having writes to the same file offset from 2 nodes really doesn't invalidate this workload. -- //www.freelists.org/webpage/oracle-l