Copy file , file blocks is different

[Homer Li <01jay.ly@xxxxxxxxx>]

Hello,

  There are 2 file in the xfs device, md5 is the same, but the size is different. 
ÂÂÂÂÂ I don't know why .......
ÂÂÂÂÂ Does anyone could help me? 


ÂÂÂÂÂ Server1 is EMC Isilon export from NFS (mount point: A, onefs)
ÂÂÂÂÂ Server2 is rack server export from NFS (mount point: B, xfs)
 Login node could access A and B by NFS client, and then "copy /A/xxx/xxx to /B/xxx/xxx", the file size is different. 
 I Switch to Server3 , and use jfs or ext3, it 's ok.

ÂÂÂÂÂ mount point:
 df -h /export/data1/
      Filesystem Size Used Avail Use% Mounted on
      /dev/sdbÂÂÂÂÂÂÂÂÂÂÂÂÂÂ 17TÂÂ 13TÂ 4.1TÂ 76% /export/data1


I don't know why their "Blocks" is different.

#find /export/data1 -name
      130111_I262_FCD1F5KACXX_L8_ORYknyECRAASE-41_1.fq.gz |xargs stat
      Â File:
`/export/data1/data/F12FTSCCKF0542-01_ORYknyE/DGESEP00000760/130111_I262_FCD1F5KACXX_L8_ORYknyECRAASE-41/130111_I262_FCD1F5KACXX_L8_ORYknyECRAASE-41_1.fq.gz'
      Â Size: 287928288 ÂÂÂ Blocks: 562360ÂÂÂÂ IO
        Block: 4096ÂÂ regular file
      Device: 810h/2064dÂÂÂ Inode: 145099ÂÂÂÂÂ Links: 1
      Access: (0555/-r-xr-xr-x)Â Uid: (Â 501/Â solexa)ÂÂ Gid: (Â 501/Â
      solexa)
      Access: 2013-01-22 14:11:53.742552293 +0800
      Modify: 2013-01-15 06:51:21.650490280 +0800
      Change: 2013-01-15 06:51:21.926667534 +0800
      Â File:
`/export/data1/data/TEST/130111_I262_FCD1F5KACXX_L8_ORYknyECRAASE-41_1.fq.gz'
      Â Size: 287928288 ÂÂÂ Blocks: 1048576ÂÂÂ IO
        Block: 4096ÂÂ regular file
      Device: 810h/2064dÂÂÂ Inode: 234501ÂÂÂÂÂ Links: 1
      Access: (0644/-rw-r--r--)Â Uid: (Â 501/Â solexa)ÂÂ Gid: (Â 501/Â
      solexa)
      Access: 2013-01-22 15:47:05.078570059 +0800
      Modify: 2013-01-22 15:24:27.774527465 +0800
      Change: 2013-01-22 15:24:27.774527465 +0800


Here is jfs status, 
# stat 130111_I262_FCD1F5KACXX_L8_ORYknyECRAASE-41_1.fq.gz 
 File: `130111_I262_FCD1F5KACXX_L8_ORYknyECRAASE-41_1.fq.gz'
 Size: 287928288  Blocks: 562360 IO Block: 4096 regular file
Device: 810h/2064dÂÂÂ Inode: 4ÂÂÂÂÂÂÂÂÂÂ Links: 1
Access: (0644/-rw-r--r--)Â Uid: (Â 501/Â solexa)ÂÂ Gid: (Â 501/Â solexa)
Access: 2013-01-24 16:01:49.793750980 +0800
Modify: 2013-01-24 16:02:14.766622939 +0800
Change: 2013-01-24 16:02:14.766622939 +0800



md5:
find /export/data1 -name
      130111_I262_FCD1F5KACXX_L8_ORYknyECRAASE-41_1.fq.gz |xargs md5sum
      f570d91ed71b1cbeac6d594766a3055fÂ
/export/data1/data/F12FTSCCKF0542-01_ORYknyE/DGESEP00000760/130111_I262_FCD1F5KACXX_L8_ORYknyECRAASE-41/130111_I262_FCD1F5KACXX_L8_ORYknyECRAASE-41_1.fq.gz
      f570d91ed71b1cbeac6d594766a3055fÂ
/export/data1/data/TEST/130111_I262_FCD1F5KACXX_L8_ORYknyECRAASE-41_1.fq.gz


Here is the xfs config and system info:

#xfs_info /export/data1
      meta-data="" isize=256ÂÂÂ agcount=32,
      agsize=137260368 blks
      ÂÂÂÂÂÂÂÂ =ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ sectsz=512ÂÂ attr=2
      dataÂÂÂÂ =ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ bsize=4096ÂÂ blocks=4392331776,
      imaxpct=5
      ÂÂÂÂÂÂÂÂ =ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ sunit=0ÂÂÂÂÂ swidth=0 blks
      namingÂÂ =version 2ÂÂÂÂÂÂÂÂÂÂÂÂÂ bsize=4096ÂÂ ascii-ci=0
      logÂÂÂÂÂ =internalÂÂÂÂÂÂÂÂÂÂÂÂÂÂ bsize=4096ÂÂ blocks=521728,
      version=2
      ÂÂÂÂÂÂÂÂ =ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ sectsz=512ÂÂ sunit=0 blks,
      lazy-count=1
      realtime =noneÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ extsz=4096ÂÂ blocks=0,
      rtextents=0
      
      
      # cat /etc/redhat-release
      CentOS release 6.3 (Final)
      
      uname -r
      2.6.32-279.el6.x86_64
      
      # modinfo xfs
      filename:ÂÂÂÂÂÂ
      /lib/modules/2.6.32-279.el6.x86_64/kernel/fs/xfs/xfs.ko
      license:ÂÂÂÂÂÂÂ GPL
      description:ÂÂÂ SGI XFS with ACLs, security attributes, large
      block/inode numbers, no debug enabled
      author:ÂÂÂÂÂÂÂÂ Silicon Graphics, Inc.
      srcversion:ÂÂÂÂ 2D92BBDEE6D42920ECC78EB
      depends:ÂÂÂÂÂÂÂ exportfs
      vermagic:ÂÂÂÂÂÂ 2.6.32-279.el6.x86_64 SMP mod_unload modversions



-- 
Best Regards
Homer Li