Nathan Scott wrote:
> Hi Tim,
> 
> Can you send xfs_info output for the filesystem and the output
> from xfs_bmap -vvp on this file?
> 
> The file size has zero effect on performance, but the number and
> layout of the files extents is very relevent.  How was this file
> created?
> 
> cheers.
> 

xfs_info:
meta-data=/mnt/array/disk1       isize=2048   agcount=410, agsize=524288 
blks
          =                       sectsz=512
data     =                       bsize=4096   blocks=214670562, imaxpct=25
          =                       sunit=16     swidth=192 blks, unwritten=1
naming   =version 2              bsize=4096
log      =internal               bsize=4096   blocks=8192, version=1
          =                       sectsz=512   sunit=0 blks
realtime =none                   extsz=65536  blocks=0, rtextents=0

it is mounted rw,noatime,nodiratime
generally I am doing 32k reads from the application, so I would like 
larger blocksize (32k would be ideal), but can't go above 2k on intel...

I made the file my copying it over via dd from another machine onto a 
clean partition... then from that point we just append to the end of it, 
or modify existing data...

I am attaching the extent map