Are both of you doing a umount/mount (or export/import, I guess) of the source filesystem before both first and second test? Otherwise, there might still be a fair bit of cached data left over from the first test, which would give the 2nd an unfair advantage. I'm fairly sure unmounting a filesystem invalidates all cached pages associated with files on that filesystem, as well as any cached [iv]node entries, all of which in needed to ensure both tests are starting from the most similar situation possible. Ideally, all this would even be done in single-user mode, so that nothing else could interfere.
If there were a list of precautions to take that would put comparisons like this on firmer ground, it might provide a good starting point for such comparisons to be more than anecdotes, saving time for all concerned, both those attempting to replicate a prior casual observation for reporting, and those looking at the report. This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
