Date: Fri, 24 Jul 2009 19:31:47 -0400 From: Steve Bertrand <steve@ibctech.ca> To: Drew Tomlinson <drew@mykitchentable.net> Cc: freebsd-questions@freebsd.org Subject: Re: How to Benchmark zpool? Message-ID: <4A6A4463.6000605@ibctech.ca> In-Reply-To: <4A6A21E9.1080201@mykitchentable.net> References: <4A6A21E9.1080201@mykitchentable.net>
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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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