====== ceph ======

  * [[btrfs]]
  * [[ceph-mon]]
  * [[ceph-osd]]
  * [[ceph-mds]]
  * [[hdparm]]
  * [[xfs]]

  * [[http://ceph.com/docs/master/rados/configuration/filesystem-recommendations/|Hard Disk and Filesystem Recommendations]]

==== Kernel ====

Upstream recommends using XFS or ext4 in production.  brtfs is possible, but not recommended at this time for production environments.

Enable extended attributes for the filesystem in the kernel.

==== Setup Disks ====

Use a separate drive for the OS and the data wherever possible.  Otherwise, split them up on individual partitions.

Use ''hdparm'' to disable write caching on the drive:

<code>
hdparm -W 0 /dev/sda 0
</code>

For ext4 filesystems, enable omap support in ''ceph.conf''; optional for xfs or ext4.

<code>
filestore xattr use omap = true
</code>