Learn About Segment Size and Performance

A default  is set during  creation, based on the    level and the virtual disk I/O characteristics you specify. These two parameters should optimize the segment size appropriately for your environment. When you create the virtual disk, you are also given the option of selecting a custom segment size rather than accepting the default segment size.

Monitor your  and change segment size when necessary for optimal performance based on the guidelines below.

If your typical I/O size is larger than your segment size, increase your segment size in order to minimize the number of physical disks needed to satisfy an I/O request. This is especially true in a multi-user, database, or file system storage environment. Using a single physical disk for a single request leaves other physical disks available to simultaneously service other requests.

If you are using the virtual disk in a single-user, large I/O environment (such as for multimedia application storage), performance is optimized when a single I/O request can be serviced with a single data stripe (the segment size multiplied by the number of physical disks in the disk group that are used for I/O). In this case multiple disks are used for the same request, but each disk is only accessed once.

Related Topics

Changing Segment Size