slyphon at gmail
Oct 12, 2011, 8:08 AM
Views: 101
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XFS documentation seems to conflict with recommendations in Swift
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Hello all,
I'm in the middle of a 120T Swift deployment, and I've had some
concerns about the backing filesystem. I formatted everything with
ext4 with 1024b inodes (for storing xattrs), but the process took so
long that I'm now looking at XFS again. In particular, this concerns
me http://xfs.org/index.php/XFS_FAQ#Write_barrier_support.
In the swift documentation, it's recommended to mount the filesystems
w/ 'nobarrier', but it would seem to me that this would leave the data
open to corruption in the case of a crash. AFAIK, swift doesn't do
checksumming (and checksum checking) of stored data (after it is
written), which would mean that any data corruption would silently get
passed back to the users.
Now, I haven't had operational experience running XFS in production,
I've mainly used ZFS, JFS, and ext{3,4}. Are there any recommendations
for using XFS safely in production?
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XFS documentation seems to conflict with recommendations in Swift
