[lopsa-tech] Anyone have a Sun x4500 'thumper'?

[Xavier Canehan]

2007/9/5, John Jasen <jjasen at realityfailure.org>:
>
>
> I've googled, and done a little bit of research, but I would still
> rather talk to folks who have run one, and maybe for a bit of beer or
> quid-pro-quo, run a few benchmarks for us?


We received our 112th this week.
We made a lot of disk benchmarks, using our own bench replicating a typical
IO load for our storage system.
Even if they are closely related to our computing center, following figures
may be of interest.

Depending on ZFS disk configurations, and using 128 concurrent IO threads,
we got on average:
 . on sequential writes, 1 MB blocks: from 272 MB/s to 741 MB/s
 . on random reads, 16 kB blocks: from 5 MB/s to 70 MB/s
 . large sequential reads up to 1.2 GB/s.
With 4 threads, 128 kB blocks and random writes on files > 2GB, we achieve
1.7 GB/s.
All those figures from an application point of vue.
Usable space varies from 10.4 TB to 20.5 TB, while security disks number
move from 11 to 0.

We got similar figures for configuration similar to Travis tests, Part I.
We did not bench NFS servers on Thumpers.

Our current configuration provides 16.9TB of usable space, balancing load on
controllers to minimize impact of a single failing controller.
Zpool is built on top of raidz vdev : 6x 5+P, 2x 4+P.

As we are still working on it, I am not able to provide a detailed and
extensive public report.
However, if you need more figures related do disks, please contact me
directly.


Regards,

--
X. Canehan
System Administration Team
Centre de Calcul de l'IN2P3 - http://cc.in2p3.fr
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