Fragmentation on XFS

[Rob Bosch]

> Though, did I get the right impression that NTFS generates lots of
> extents for small writes even when nothing else is running?

The fragmentation on NTFS was a problem even when nothing else was running
on the server.  The preallocation patch made all the difference on NTFS and
cygwin.  In that world it is a must have since it increases performance on
the reads by orders of magnitude while not impacting the write-side since
the cygwin posix_fallocate is very efficient. 

Rob