Oracle Tips by Burleson

Oracle10g Grid Computing with RAC
Chapter 6 - Install, Configure and Database Creation

CRS – Cluster Ready Services

On Windows-based platforms, the OracleCSService, OracleCRService, and OracleEVMService provides the cluster manager functionality. We have covered the installation of CRS in later sections.

A Note on SKGXP, SKGXN Libraries

Oracle has defined APIs for inter-process communication and node membership. These are the APIs that facilitate integration with vendor clusterware or Oracle provided clusterware. Oracle communicates between processes on instances and does not have to know how the data is moved between systems. The Oracle API for IPC is referred to as system kernel generic interface inter-process communications (skgxp).

The OSD or clusterware normally provides a kernel module that receives communications from the skgxp library and passes it to the correct process on the correct instance on other nodes. It is the responsibility of the implementer to design the communication package in the form of a kernel module in compliance with the specification.