<div dir="ltr"><div class="gmail_extra"><div><br></div>
<br><br><div class="gmail_quote">On Tue, Jun 3, 2014 at 7:44 AM, Jean-Yves Avenard <span dir="ltr"><<a href="mailto:jyavenard@gmail.com" target="_blank">jyavenard@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid">
<div>On 3 June 2014 15:35, Johan Van der Kolk <<a href="mailto:johan.vanderkolk@gmail.com">johan.vanderkolk@gmail.com</a>> wrote:<br>
<br>
> For those who understand bonnie ( i don’t). This is a command line taken<br>
> from <a href="https://calomel.org/zfs_raid_speed_capacity.html" target="_blank">https://calomel.org/zfs_raid_speed_capacity.html</a>.<br>
> I ran it on my zfspool.<br>
><br>
> Version 1.97 ------Sequential Output------ --Sequential Input-<br>
> --Random-<br>
> Concurrency 1 -Per Chr- --Block-- -Rewrite- -Per Chr- --Block--<br>
> --Seeks--<br>
> Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec<br>
> %CP<br>
> Zolder-server 80G 318688 37 136544 25 269337 20<br>
> 38.6 2<br>
> Latency 4301ms 1176ms 549ms<br>
> 658ms<br>
><br>
<br>
</div>beware with Bonnie, more often than not (and that's certainly the case<br>
with the calomel review), due to the arguments provided what they are<br>
really testing is the cache and memory speed, and rarely the actual<br>
raw I/O to the disk.<br>
<br>
136MB/s on 6 disks in RAIDZ2 is rather low, much lower than I would<br>
have expected (mine gives me over 400MB/s of raw I/O under similar<br>
conditions)<br></blockquote><div> </div><div>It's an "out of the box installation" from the zfs repository. Ran out of time to understand and tune the parameters. But it worked, met the requirements at the time.</div>
<div>Probably not a bad idea to see what can be tweaked. There is still a possibility to move all data to the SSD or another disk and meanwhile optimize the ZFS.</div><div>But it looks like ZFS is not my main bottleneck. Even at a poor 139MB/s it manages to write 500GB per hour. (theoretically, and with reservations with regards to the measurement method)</div>
<div><br></div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid">
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