If rebuild times are a problem then I recommend you go with ZFS or a Netapp. High-performance Netapp can be expensive. ZFS doesn't have to be. A fsck of a large filesystem can easily take > 24 hours.
Dimitri -- Dimitrios Gerasimatos dimitrios.gerasima...@jpl.nasa.gov Section 343 Jet Propulsion Laboratory 4800 Oak Grove Dr. Mail Stop 264-820 Pasadena, CA 91109 Voice: 818.354.4910 FAX: 818.393.7413 Cell: 818.726.8617 -----Original Message----- From: beowulf-boun...@beowulf.org [mailto:beowulf-boun...@beowulf.org] On Behalf Of beowulf-requ...@beowulf.org Sent: Thursday, November 19, 2009 12:01 PM To: beowulf@beowulf.org Subject: Beowulf Digest, Vol 69, Issue 22 Send Beowulf mailing list submissions to beowulf@beowulf.org To subscribe or unsubscribe via the World Wide Web, visit http://www.beowulf.org/mailman/listinfo/beowulf or, via email, send a message with subject or body 'help' to beowulf-requ...@beowulf.org You can reach the person managing the list at beowulf-ow...@beowulf.org When replying, please edit your Subject line so it is more specific than "Re: Contents of Beowulf digest..." Today's Topics: 1. Large raid rebuild times (james bardin) 2. Re: Large raid rebuild times (Paul Van Allsburg) ---------------------------------------------------------------------- Message: 1 Date: Thu, 19 Nov 2009 13:18:41 -0500 From: james bardin <jbar...@bu.edu> Subject: [Beowulf] Large raid rebuild times To: beowulf@beowulf.org Message-ID: <a3b675320911191018s43cba643p55d56c5df8b75...@mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1 Hello, Has anyone here seen any numbers, or tested themselves, the rebuild times for large raid arrays (raid 6 specifically)? I can't seem to find anything concrete to go by, and I haven't had to rebuild anything larger than a few TB. What happens when you loose a 2TB drive in a 20TB array for instance? Do any hardware raid solutions help. I don't think ZFS is an option right now, so I'm looking at Linux and/or hardware raid. Thanks -jim ------------------------------ Message: 2 Date: Thu, 19 Nov 2009 14:18:49 -0500 From: Paul Van Allsburg <vanallsb...@hope.edu> Subject: Re: [Beowulf] Large raid rebuild times To: james bardin <jbar...@bu.edu> Cc: beowulf@beowulf.org Message-ID: <4b059a19....@hope.edu> Content-Type: text/plain; charset=ISO-8859-1; format=flowed james bardin wrote: > Hello, > > Has anyone here seen any numbers, or tested themselves, the rebuild > times for large raid arrays (raid 6 specifically)? > I can't seem to find anything concrete to go by, and I haven't had to > rebuild anything larger than a few TB. What happens when you loose a > 2TB drive in a 20TB array for instance? Do any hardware raid solutions > help. I don't think ZFS is an option right now, so I'm looking at > Linux and/or hardware raid. > > > Thanks > -jim > _______________________________________________ > Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing > To change your subscription (digest mode or unsubscribe) visit > http://www.beowulf.org/mailman/listinfo/beowulf > > Jim, I have a new Infortrend a24s-g2130 with 24 x 1T drives. I setup a raid6 with 2 spares and during the raid initialization a drive failed. The raid6 initialization took 20 hours and the rebuild took 16 hours. I've since changed the rebuild priority from normal to high but have not had any more drives fail. Cheers, Paul http://www.infortrend.com/main/2_product/es_a24s-g2130.asp -- Paul Van Allsburg Scientific Computing Specialist Natural Sciences Division, Hope College 35 E. 12th St. Holland, Michigan 49423 616-395-7292 vanallsb...@hope.edu http://www.hope.edu/academic/csm/ ------------------------------ _______________________________________________ Beowulf mailing list Beowulf@beowulf.org http://www.beowulf.org/mailman/listinfo/beowulf End of Beowulf Digest, Vol 69, Issue 22 *************************************** _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
