Difference between pages "Set up a groupware server using open xchange" and "I/O sniffing"

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You can do I/O sniffing using the command blktrace. blktrace will show you every request that goes to the disk.
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Example:
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# blktrace -d /dev/sdg -o - | blkparse -i -
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  <abbr title="device (major/minor number)">8,96</abbr>  <abbr title="device (major/minor number)">2</abbr>        <abbr title="device (major/minor number)">1</abbr>    <abbr title="device (major/minor number)">0.000000000</abbr>  <abbr title="device (major/minor number)">1236</abbr>  <abbr title="device (major/minor number)">G</abbr>  <abbr title="device (major/minor number)">N</abbr> <abbr title="process">[kworker/2:4]</abbr>
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  8,96  2        2    0.000001308  1236  I  N 0 (00 ..) [kworker/2:4]
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  8,96  2        3    0.000002781  1236  D  N 0 (00 ..) [kworker/2:4]

Revision as of 05:14, 25 May 2013

You can do I/O sniffing using the command blktrace. blktrace will show you every request that goes to the disk.

Example:

# blktrace -d /dev/sdg -o - | blkparse -i - 
  8,96   2        1     0.000000000  1236  G   N [kworker/2:4]
  8,96   2        2     0.000001308  1236  I   N 0 (00 ..) [kworker/2:4]
  8,96   2        3     0.000002781  1236  D   N 0 (00 ..) [kworker/2:4]