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2007 Dec 21
1
Odd behavior of NFS of ZFS versus UFS
...that we were having. Its very simple and I will include the c code at the end. What is does is to time the creation of a file, do an 8k synchronous write, and close the file. If the time is greater than 1 second, it prints out the elapsed time. Very simple. The Test: I have two identical SunBlade 2500s that each mount a file system, run a loop of iozone 500 then sleep 10 seconds, run nf (my test program) on the mounted file system. One does this on the ZFS based file system and the other on the UFS based one. The Results: On the UFS based filesystem, nf reports ZERO output. Thus, it never took m...