If the file access patterns of your clients are random (nonsequential) and the cache age is less than three, setting minimal read-ahead to on might improve performance.
Considerations
By default, the storage system uses aggressive read-ahead, which enhances sequential access and is more commonly used by UNIX clients and applications.
Steps
-
Enter the following command to determine the cache age: sysstat
- If the cache age is less than three, enter the following command for each volume to specify minimal read-ahead: vol options volname minra on
By default, the option is set to off and the storage system does very aggressive read-ahead.
Setting the minra option to on enables minimum read-ahead on volname.
