Vijay Adik vadik@us - IBM
Vijay Adik vadik@us - IBM
Vijay Adik vadik@us - IBM
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55<br />
<strong>IBM</strong> Advanced Technical Support - Americas<br />
IO : Asynchronous IO (AIO)<br />
• Allows multiple requests to be sent without to have to wait until the disk subsystem has<br />
completed the physical IO.<br />
• Utilization of asynchronous IO is strongly advised whatever the type of file-system and mount<br />
option implemented (JFS, JFS2, CIO, DIO).<br />
Application<br />
�Posix vs Legacy<br />
Since AIX5L V5.3, two types of AIO are now available : Legacy and Posix. For the moment, the<br />
Oracle code is using the Legacy AIO servers.<br />
© 2009 <strong>IBM</strong> Corporation<br />
1<br />
2<br />
aio<br />
Q<br />
3 4<br />
aioservers<br />
April 17, 2009<br />
Disk
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