-Re: Question about RAID controllers and hadoop
Koert Kuipers 2011-08-12, 00:11
Hey Charles, I was considering using 8 drives, each set as RAID0, so its
good to hear such a setup is working for you.
On Thu, Aug 11, 2011 at 6:26 PM, Charles Wimmer <[EMAIL PROTECTED]>wrote:
> We currently use P410s in 12 disk system. Each disk is set up as a RAID0
> volume. Performance is at least as good as a bare disk.
> On 8/11/11 3:23 PM, "GOEKE, MATTHEW (AG/1000)" <[EMAIL PROTECTED]>
> If I read that email chain correctly then they were referring to the
> classic JBOD vs multiple disks striped together conversation. The
> conversation that was started here is referring to JBOD vs 1 RAID 0 per disk
> and the effects of the raid controller on those independent raids.
> -----Original Message-----
> From: Kai Voigt [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, August 11, 2011 5:17 PM
> To: [EMAIL PROTECTED]
> Subject: Re: Question about RAID controllers and hadoop
> Yahoo did some testing 2 years ago:
> But updated benchmark would be interesting to see.
> Am 12.08.2011 um 00:13 schrieb GOEKE, MATTHEW (AG/1000):
> > My assumption would be that having a set of 4 raid 0 disks would actually
> be better than having a controller that allowed pure JBOD of 4 disks due to
> the cache on the controller. If anyone has any personal experience with this
> I would love to know performance numbers but our infrastructure guy is doing
> tests on exactly this over the next couple days so I will pass it along once
> we have it.
> > Matt
> > -----Original Message-----
> > From: Bharath Mundlapudi [mailto:[EMAIL PROTECTED]]
> > Sent: Thursday, August 11, 2011 5:00 PM
> > To: [EMAIL PROTECTED]
> > Subject: Re: Question about RAID controllers and hadoop
> > True, you need a P410 controller. You can create RAID0 for each disk to
> make it as JBOD.
> > -Bharath
> > ________________________________
> > From: Koert Kuipers <[EMAIL PROTECTED]>
> > To: [EMAIL PROTECTED]
> > Sent: Thursday, August 11, 2011 2:50 PM
> > Subject: Question about RAID controllers and hadoop
> > Hello all,
> > We are considering using low end HP proliant machines (DL160s and DL180s)
> > for cluster nodes. However with these machines if you want to do more
> than 4
> > hard drives then HP puts in a P410 raid controller. We would configure
> > RAID controller to function as JBOD, by simply creating multiple RAID
> > volumes with one disk. Does anyone have experience with this setup? Is it
> > good idea, or am i introducing a i/o bottleneck?
> > Thanks for your help!
> > Best, Koert
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