On 01/03/2013 03:16 PM, Roberto Aguilar wrote:
Hello,
I read the "Filesystems" section in the "Hard disk and file system
recommendations" [1] documentation and was confused on whether or not
I should be using the setting:
filestore xattr use omap = true
The section reads:
"[...] but the ext4 is too small to be usable. To use these file
systems, you should add the following like to the [osd] section of
your ceph.conf file.:"
Does that mean I the setting applies to systems that are using ext4,
or does it apply to _any_ filesystem that was mentioned, i.e. btrfs,
xfs, and ext4.
Thanks!
-Roberto.
[1] http://ceph.com/docs/master/rados/configuration/filesystem-recommendations/
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Hi Roberto,
You should always use "filestore xattr use omap = true" with EXT4. You
can optionally use it for BTRFS and XFS. I've done a bit of testing and
haven't yet been able to determine if there is any significant advantage
or disadvantage to using it on BTRFS and XFS from a performance
perspective. So far the performance differences haven't been consistent
or significant enough to be conclusive.
Mark
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