XFS is a high-performance journaling file system created by Silicon Graphics, Inc. XFS is particularly proficient at parallel IO due to its allocation group based design. This enables extreme scalability of IO threads, filesystem bandwidth, file and filesystem size when spanning multiple storage devices.
If for whatever reason you experience data corruption, you will need to repair the filesystem manually.
Repair XFS Filesystem
First unmount the XFS filesystem.
# unmount /dev/sda3
Once unmounted, run the xfs_repair tool.
# xfs_repair -v /dev/sda3
The best way to get performance out of XFS is to plan ahead before you create the filesystem. Where is the journal stored?
For more info read: Maximizing Performance
Stripe size and width
If this filesystem will be on a striped RAID you can gain significant speed improvements by specifying the stripe size to the
You can increase performance by disabling barrier usage for the filesystem by adding the nobarrier mount option to the
On some filesystems you can increase performance by adding the
noatime mount option to the
/etc/fstab file. For XFS filesystems the default atime behaviour is
relatime, which has almost no overhead compared to noatime but still maintains sane atime values. All Linux filesystems use this as the default now (since around 2.6.30), but XFS has used relatime-like behaviour since 2006, so no-one should really need to ever use noatime on XFS for performance reasons.
nodiratime, so there is never a need to specify nodiratime when noatime is also specified.
Although the extent-based nature of XFS and the delayed allocation strategy it uses significantly improves the file system's resistance to fragmentation problems, XFS provides a filesystem defragmentation utility (xfs_fsr, short for XFS filesystem reorganizer) that can defragment the files on a mounted and active XFS filesystem. It can be useful to view XFS fragmentation periodically.
xfs_fsr improves the organization of mounted filesystems. The reorganization algorithm operates on one file at a time, compacting or otherwise improving the layout of the file extents (contiguous blocks of file data).
Inspect fragmentation levels
To see how much fragmentation your file system currently has:
# xfs_db -c frag -r /dev/sda3
To begin defragmentation, use the
xfs_fsr command which is included with the xfsprogs package.
# xfs_fsr /dev/sda3