3.4.5 Enabling Write Back Flash Cache

Write operations serviced by flash instead of by disk are referred to as write-back flash cache.

Starting with Oracle Exadata System Software release 11.2.3.2.1, Exadata Smart Flash Cache can transparently cache frequently-accessed data to fast solid-state storage, improving query response times and throughput.

• Enable Write Back Flash Cache for 11.2.3.3.1 or Higher
  Enable write back Flash Cache on the storage servers to improve query response times and throughput.
• Enabling Write Back Flash Cache on a Rolling Basis for Software Versions Lower Than 11.2.3.3.1
  You can enable Write Back Flash Cache on a rolling basis.
• Enabling Write Back Flash Cache in a Non-Rolling Basis for Software Versions Lower Than 11.2.3.3.1
  You can enable Write Back Flash Cache on a non-rolling basis.