Continuous availability of financial market data is essential. High Availability and Disaster Recovery are provided in Sybase RAP by a combination of server configurations and procedures. For example, in the event the in-memory cache (ASE RAPCache) becomes unusable, ASE is synchronized with a second copy of the RAPCache to ensure automatic, timely recovery and failover of the primary cache. Another example is the redundant data streams that ensure fault tolerance, if a feed handler stream is interrupted.
For Disaster Recovery of the IQ RAPStore, Sybase IQ multiplex is used for automatic failover of the writer node from a designated reader node.
