Tony Galway wrote:

I had previously undertaken a benchmark that pits “out of box” performance of UFS via SVM, VxFS and ZFS but was waylaid due to some outstanding availability issues in ZFS. These have been taken care of, and I am once again undertaking this challenge on behalf of my customer. The idea behind this benchmark is to show

a. How ZFS might displace the current commercial volume and file system management applications being used.

b. The learning curve of moving from current volume management products to ZFS.

c. Performance differences across the different volume management products.

VDBench is the test bed of choice as this has been accepted by the customer as a telling and accurate indicator of performance. The last time I attempted this test it had been suggested that VDBench is not appropriate to testing ZFS, I cannot see that being a problem, VDBench is a tool – if it highlights performance problems, then I would think it is a very effective tool so that we might better be able to fix those deficiencies.


First, VDBench is a Sun internal and partner only tool so you might not get much response on this list. Second, VDBench is great for testing raw block i/o devices. I think a tool that does file system testing will get you better data.
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