Hey Charles, I was considering using 8 drives, each set as RAID0, so its good to hear such a setup is working for you. Best Koert
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]> > wrote: > > 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. > > Matt > > -----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: > http://markmail.org/message/xmzc45zi25htr7ry > > But updated benchmark would be interesting to see. > > Kai > > 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 > the > > RAID controller to function as JBOD, by simply creating multiple RAID > > volumes with one disk. Does anyone have experience with this setup? Is it > a > > good idea, or am i introducing a i/o bottleneck? > > Thanks for your help! > > Best, Koert > > This e-mail message may contain privileged and/or confidential > information, and is intended to be received only by persons entitled > > to receive such information. If you have received this e-mail in error, > please notify the sender immediately. Please delete it and > > all attachments from any servers, hard drives or any other media. Other > use of this e-mail by you is strictly prohibited. > > > > All e-mails and attachments sent and received are subject to monitoring, > reading and archival by Monsanto, including its > > subsidiaries. The recipient of this e-mail is solely responsible for > checking for the presence of "Viruses" or other "Malware". > > Monsanto, along with its subsidiaries, accepts no liability for any > damage caused by any such code transmitted by or accompanying > > this e-mail or any attachment. > > > > > > The information contained in this email may be subject to the export > control laws and regulations of the United States, potentially > > including but not limited to the Export Administration Regulations (EAR) > and sanctions regulations issued by the U.S. Department of > > Treasury, Office of Foreign Asset Controls (OFAC). As a recipient of > this information you are obligated to comply with all > > applicable U.S. export laws and regulations. > > > > > > -- > Kai Voigt > [email protected] > > > > > >
