Fragmentation Issue We Are Having

[Brian Candler]

On Thu, Apr 12, 2012 at 05:09:40PM -0700, David Fuller wrote:
>    The total LVM volume group is 4.5 TB.  The logical volume is around
>    2.3TB where the mysql data

Hence you have a 2.3TB XFS filesystem? You need inode64. The side warning
"performance sucks" is very true.  In particular, if you create a bunch of
files in the same directory, without inode64 XFS will scatter the extents
all over the disk rather than trying to allocate them next to each other
(possibly not a problem if you're only storing mysql data chunks though)