Extended Adaptive Cache

You can use Extended Adaptive Cache to improve system performance by collecting disk usage data, and then using those statistics to create a cache, effectively reducing the physical I/O requests for the disk.

Improve your iSeries™ system performance with Extended Adaptive Cache. Extended Adaptive Cache improves both the I/O subsystem and system response times by reducing the number of physical I/O requests that are read from disk. Extended Adaptive Cache generates statistical information for the data and then uses a mix of management strategies to determine which data to cache.

Note: In V5R4, Extended Adaptive Cache is supported on older iSeries systems. Extended Adaptive Cache uses the feature code, #4331 1.6 GB Read Cache.

• Extended Adaptive Cache Concepts
  Explore Extended Adaptive Cache. Find information about planning, restrictions, and important considerations before you begin to use this tool.
• 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.