files written in multiple fragments

["Rick Smith" <rgsmith72@xxxxxxxxxxx>]

Steve,
	I have encountered another oddity while writing successive files to my high 
speed XFS partition under linux. The problem that I am seeing is that files 
are intermittently written in several 1024 block fragments. This filesystem 
has been performing well for the past two weeks with many directories 
created, many files written, and many directories deleted. While this would 
normally not be a problem, it is a big performance hit when it comes time to 
read the file.
	Do you have any suggestions on how I might prevent this behavior? I have 
included the xfs_info and xfs_bmap output below. Thanks.

Rick

meta-data=/test                 isize=256    agcount=172, agsize=1048576 
blks
        =                       sectsz=512
data     =                       bsize=4096   blocks=179566240, imaxpct=25
        =                       sunit=1      swidth=10 blks, unwritten=0
naming   =version 2              bsize=4096
log      =external               bsize=4096   blocks=32768, version=1
        =                       sectsz=512   sunit=0 blks
realtime =none                   extsz=40960  blocks=0, rtextents=0


test.36.data:
       0: [0..10799]: 1368218048..1368228847
test.37.data:
       0: [0..1023]: 1367828040..1367829063
       1: [1024..2047]: 1367827016..1367828039
       2: [2048..3071]: 1367825992..1367827015
       3: [3072..4095]: 1367824968..1367825991
       4: [4096..5119]: 1367823944..1367824967
       5: [5120..6143]: 1367822920..1367823943
       6: [6144..7167]: 1367821896..1367822919
       7: [7168..8191]: 1367820872..1367821895
       8: [8192..9215]: 1367819848..1367820871
       9: [9216..10239]: 1367818824..1367819847
       10: [10240..10799]: 1367818256..1367818815
test.38.data:
       0: [0..10799]: 1368228848..1368239647
test.39.data:
       0: [0..1023]: 1367817232..1367818255
       1: [1024..2047]: 1367816208..1367817231
       2: [2048..3071]: 1367815184..1367816207
       3: [3072..4095]: 1367814160..1367815183
       4: [4096..5119]: 1367813136..1367814159
       5: [5120..6143]: 1367812112..1367813135
       6: [6144..7167]: 1367811088..1367812111
       7: [7168..8191]: 1367810064..1367811087
       8: [8192..9215]: 1367809040..1367810063
       9: [9216..10239]: 1367808016..1367809039
       10: [10240..10799]: 1367807448..1367808007

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