optimize I/O
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| Author | Content |
|---|---|
| adept Nov 23, 2004 6:15 AM EDT |
1.
dd if=/dev/sde of=/dev/null & iostat -x /dev/sde 1
avgrq-sz (The average size in sectors of the requests) - 64 sectors (64 * 512 = 32768 byte) 2. raw /dev/raw/raw1 /dev/sde dd if=/dev/raw/raw1 of=/dev/null & iostat -x /dev/sde 1 avgrq-sz (The average size in sectors of the requests) - 32 sectors (32 * 512 = 16384 byte) why ? |
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