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.
