[Beowulf] Any recommendations for a good JBOD?

Eugen Leitl eugen at leitl.org
Fri Feb 19 04:30:12 EST 2010


On Thu, Feb 18, 2010 at 12:53:22PM -0600, Rahul Nabar wrote:
> On Thu, Feb 18, 2010 at 12:14 PM, Alex Chekholko <chekh at pcbi.upenn.edu> wrote:
> > On Thu, 18 Feb 2010 11:37:36 -0600
> > Does it need to be rack-mount?  What kind of interface?
> 
> Preferably rack-mount. But cost is a compelling argument . I could be
> convinced if a non-rack unit was significantly cheaper.
> 
> I was thinking SAS / SCSI / iSCSI is probably easiest and cheapest.
> 
> 
> > If performance is really not an issue, a consumer-level NAS box is
> > probably your cheapest option.  A QNap TS-410 is ~$450 plus 4 x 2TB
> > drives...
> 
> Hmm...NAS. I was more thinking in terms of a DAS. Don't the NAS's come
> with their own CPU's / RAM and stuff? (Like the Sun Thumper)

I know this isn't your design space, but Matt on zfs-discuss
posted the following part list


http://www.acmemicro.com/estore/merchant.ihtml?pid=5440&lastcatid=53&step=4
http://www.newegg.com/Product/Product.aspx?Item=N82E16820139043
http://www.acmemicro.com/estore/merchant.ihtml?pid=4518&step=4
http://www.acmemicro.com/estore/merchant.ihtml?pid=6708&step=4
http://www.newegg.com/Product/Product.aspx?Item=N82E16819117187
http://www.newegg.com/Product/Product.aspx?Item=N82E16835203002

later he added

I'm just going to use the single 4x SAS.  1200MB/sec should be a great plenty for 24 drives total.  I'm going to be mounting 2x SSD for ZIL and 2x SSD for ARC, then 20-2TB drives.  I'm guessing that with a random I/O workload, I'll never hit the 1200MB/sec peak that the 4x SAS can sustain.

Also - for the ZIL I will be using 2x 32GB Intel X25-E SLC drives, and for the ARC I'll be using 2x 160GB Intel X25M MLC drives.  I'm hoping that the cache will allow me to saturate gigabit and eventually infiniband.

-- 
Eugen* Leitl <a href="http://leitl.org">leitl</a> http://leitl.org
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