On Thu, Aug 11, 2011 at 3:26 PM, Charles Wimmer <cwim...@yahoo-inc.com> 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.
Can you please share what throughput you see with P410s? Are these SATA or SAS? > > > On 8/11/11 3:23 PM, "GOEKE, MATTHEW (AG/1000)" <matthew.go...@monsanto.com> > 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:k...@123.org] > Sent: Thursday, August 11, 2011 5:17 PM > To: common-user@hadoop.apache.org > 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:bharathw...@yahoo.com] >> Sent: Thursday, August 11, 2011 5:00 PM >> To: common-user@hadoop.apache.org >> 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 <ko...@tresata.com> >> To: common-user@hadoop.apache.org >> 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 > k...@123.org > > > > > >
