All high availability requirements are met through the configuration of installed Sybase RAP components. A specific software feature set to provide a high availability mechanism is not necessary.
High availability in Sybase RAP involves a primary data stream and a secondary data stream.
The primary data stream is defined as all of the software processes, networking, and hardware necessary to capture and store financial market data obtained from one or more feeds into the primary RAPCache (ASE) and the RAPStore (Sybase IQ).
The secondary data stream is defined as all of the software processes, networking, and hardware necessary to capture and store the same financial market data into a secondary RAPCache.
All primary data stream software components configured should be installed and run on their own hardware and network; all secondary data stream software components configured should be installed and run on their own hardware and network, which is different than that of the primary data stream.
This discussion does not detail the implementation of high availability by any potential third-party providers of feed handlers. This discussion focuses on the Sybase RAP components that have a role in capturing and delivering the market data through the Sybase RAP system. These components are:
Sybase RAP Publisher API
RAPCache Subscriber
FAST Feed Handler
RAPCache
RAPStore and RAPStore Subscriber
