RAP in a High Availability Environment

RAP ensures continuous availability of financial market data by providing high availability and disaster recovery through a combination of server configurations and procedures.

If you are using SAP HANA as your in-memory databases, see the SAP HANA documentation for information on how to ensure disaster recoverability and high availability of the SAP HANA server.

If you are using Adaptive Server as your in-memory database, if the in-memory cache becomes unusable, Adaptive Server Enterprise is synchronized with a secondary copy of the Adaptive Server (RAPCache) to ensure automatic, timely recovery and failover of the primary cache.

For disaster recovery of Sybase IQ, the Sybase IQ multiplex is used for automatic failover of the writer node from a designated reader node. For more information, see the Adaptive Server Enterprise 15.7 documentation, and the Sybase IQ 15.4 documentation.

• Ensuring Market Data Consistency
  You can configure RAP to enhance the availability of market data to trading applications.
• Roles of RAP Components
  All high availability requirements are met through the configuration of installed RAP components.
• Application Connection Failover
  If the primary RAPCache (Adaptive Server Enterprise) fails, the application using it may not automatically failover to the secondary RAPCache. Other, manual means may be needed to redirect the failover.
• Cleaning Up the RAPStore
  Once the LOAD TABLE command completes for every table that must be reloaded, clean up the RAPStore before restarting the Sybase IQ Output adapter. The RAPStore loads data using files written by the Sybase IQ Output adapter.