On 10/01/2012 09:09 AM, Edward Ned Harvey (opensolarisisdeadlongliveopensolaris) wrote:
Just perform a bunch of writes, time it. Then set sync=disabled, perform the same set of writes, time it. Then enable sync, add a ZIL device, time it. The third option will be somewhere in between the first two.

To "perform a bunch of writes", vdbench is a very useful tool.

https://blogs.oracle.com/henk/entry/vdbench_a_disk_and_tape
http://sourceforge.net/projects/vdbench/files/vdbench503beta/
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