Tony Galway wrote:
A question (well lets make it 3 really) – Is vdbench a useful tool when testing file system performance of a ZFS file system?
Not really. VDBench simply reads and writes from the allocated file. Filesystem tests do things like create files, read files, delete files, move files, create directories, remove directories with their contents, etc. You also will see different results based on the inner workings of the filesystem itself.
[For Sun folks we've been bashing this one around on the vdbench list for a few weeks]
Third - what is a good benchmarking tool to test ZFS vs UFS vs VxFS?
I've been recommending filebench http://www.solarisinternals.com/si/tools/filebench/index.php though depending on the app your customer runs it might be easier to just run the app for a bit.
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