Get Extended Adaptive Cache

After obtaining the performance data from Extended Adaptive Cache Simulator and deciding that you want Extended Adaptive Cache to improve your system's performance, you must purchase a Read Cache Device (RCD). Extended Adaptive Cache is automatically enabled through the RCD.

To begin using Extended Adaptive Cache, you must have:

• One or more storage I/O adapters that support Extended Adaptive Cache (CCIN 2748 for systems running V4R4 or later, or CCIN 2778 for systems running V5R1 or later, or CCIN 2757 for systems running the latest release of V5R2).
• A Read Cache Device for each storage I/O adapter that Extended Adaptive Cache is to be activated on (CCIN 6731 for systems running V4R4 or later).

Because Extended Adaptive Cache is automatically enabled through the RCD, there is no controlled on or off switch. The RCD may be added without system interruption through concurrent maintenance. The RCD resides in an internal disk slot and works with all other disk types and capacities. Be aware that all data in the Extended Adaptive Cache is also guaranteed to be on the disks. In the unlikely event of an RCD failure, there will be no data loss.

The Read Cache Device can be purchased wherever iSeries™ hardware is sold, or contact your local IBM^® representative.