On 2/4/2013 6:01 PM, Roy Sigurd Karlsbakk wrote:

quoted

Third, use XFS, and format with alignment to the md device:
~$ mkfs.xfs -d su=512k,sw=4

Why? ext4 should be just as good for that, 

XFS generally yields better performance with concurrency, and is simply
a better filesystem across the board WRT performance, features, and
tools.  And XFS has been designed and optimized since 1994 specifically
for storing and streaming large files, making it a perfect fit for the
OP's 4GB files.

Why use "just as good" when one can use the best?

and better for metadata

XFS metadata performance has exceeded that of EXT4 since mainline kernel
2.6.39 (May 2011) for workloads with medium to large concurrency (2-4
threads or more).  It's single thread metadata performance is now not
far behind EXT4.  Thus journal metadata performance is no longer a
reason to avoid XFS.

Regardless, metadata performance is irrelevant to the OP's stated workload.

-- 
Stan