From: Stan Hoeppner <stan@hardwarefreak.com>
To: xfs@oss.sgi.com
Subject: Re: Anyone using XFS in production on > 20TiB volumes?
Date: Thu, 23 Dec 2010 13:54:14 -0600 [thread overview]
Message-ID: <4D13A8E6.7090606@hardwarefreak.com> (raw)
In-Reply-To: <alpine.DEB.2.00.1012231403440.5924@p34.internal.lan>
Justin Piszcz put forth on 12/23/2010 1:07 PM:
> Main wonder I have is why when the partition is aligned to 1MiB, which is
> the default in parted 2.2+ I believe, is it slower than with no partitions?
Best guess? Those 3TB Hitachi drives use 512 byte translated native 4KB
sectors. The 9750-24 ie card doesn't know how to properly align
partitions on such drives, and/or you're using something other than
fdisk or parted to create your partitions. Currently these are the only
two partitioners that can align partitions properly on 512 byte
translated/native 4KB sector drives. Thus you're taking a performance
hit, same as with the WD "Advanced Format" drives which have 512 byte
translated/native 4KB sectors.
If you want maximum performance with least configuration headaches,
avoid 512B/4KB sector hybrid drives. If you _need_ maximum drive
capacity, live with the warts, or jump through hoops to get the
partitions aligned, or, live without partitions if you can.
--
Stan
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next prev parent reply other threads:[~2010-12-23 19:52 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-22 16:30 Anyone using XFS in production on > 20TiB volumes? Justin Piszcz
2010-12-22 16:56 ` Emmanuel Florac
2010-12-22 19:03 ` Eric Sandeen
2010-12-23 0:26 ` Emmanuel Florac
2010-12-23 0:28 ` Justin Piszcz
2010-12-23 0:56 ` Dave Chinner
2010-12-23 9:43 ` Justin Piszcz
2010-12-23 12:03 ` Emmanuel Florac
2010-12-23 18:06 ` Justin Piszcz
2010-12-23 18:55 ` Emmanuel Florac
2010-12-23 19:07 ` Justin Piszcz
2010-12-23 19:54 ` Stan Hoeppner [this message]
2010-12-23 21:48 ` Emmanuel Florac
2010-12-23 23:21 ` Stan Hoeppner
2010-12-23 21:50 ` Emmanuel Florac
2010-12-23 22:04 ` Justin Piszcz
2010-12-23 19:29 ` Justin Piszcz
2010-12-23 19:58 ` Stan Hoeppner
2010-12-24 1:01 ` Stan Hoeppner
2010-12-23 21:12 ` Eric Sandeen
2010-12-23 1:10 ` Emmanuel Florac
2010-12-22 17:06 ` Chris Wedgwood
2010-12-22 17:10 ` Justin Piszcz
2010-12-22 17:32 ` Chris Wedgwood
2010-12-22 17:35 ` Justin Piszcz
2010-12-22 18:50 ` Chris Wedgwood
2010-12-22 19:24 ` Justin Piszcz
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