Drew Tomlinson wrote: > I'm familiar with testing read speed of regular hard drive like this: > > dd if=/dev/daX of=/dev/null bs=65536 > > How would I go about testing the read speed of a version 13 zfs raid1z > zpool?
To get a q&d result, I usually install "mkfile":
# pkg_add -r mkfile
...and then in a few terminal windows to get the write speed:
# mkfile 50g bigfile.1
# mkfile 50g bigfile.2
# mkfile 50g bigfile.3
while in another terminal window, I watch:
# zpool iostat 1
...to get the read speed while still having the iostat term open:
# dd if=bigfile.1 of=/dev/null bs=65536
amanda# zpool iostat 1
capacity operations bandwidth
pool used avail read write read write
storage 1.53T 292G 1.02K 0 130M 0
storage 1.53T 292G 1.05K 0 134M 0
storage 1.53T 292G 1.02K 0 129M 0
storage 1.53T 292G 1.02K 0 129M 0
storage 1.53T 292G 1.05K 0 134M 0
Steve
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