> Test Case: Run 'iostat', then write a 1GB file using 'mkfile 1g > testfile' and then run iostat again.
It may also be interesting to look at zpool iostat, which should show the I/O to the pool, from ZFS's perspective. I'd also be curious to know how your zpool was configured. > ZFS Test Results: The KB written per second averaged around 250KB. > VxFS Test Results: The KB written per second averaged around 70KB. > > When I fixed the ZFS record size to 8KB the KB written per second > averaged 110KB. > > My questions by be too general to answer here but I thought I would try. > > Why does ZFS write more traffic to disk then VxFS? This seems like an odd way to ask such a question. I may have misunderstood, but it sounds like ZFS is faster than VxFS. 250k/s versus 70k/s seems to imply that you had higher I/O throughput, and presumably finished faster. Isn't that a good thing? > Why does ZFS write more traffic to disk when the Record Size is > variable instead of fixed in size? I'm not sure I understand what you're asking. -j _______________________________________________ perf-discuss mailing list perf-discuss@opensolaris.org
