Oracle Database Tips by Donald Burleson

Oracle10g Grid Computing with RAC
Chapter 5 - Preparing Shared Storage

Configure PolyServe Cluster File System for Linux

The PolyServe Matrix Server complements Oracle Cluster Management Services in such a way that nodes will never have to be fenced via the default Linux RAC behavior of powering off a node (STOMITH). PolyServe Matrix Server provides fencing via the SCL.

MxS software is installed on each of the servers in the cluster or matrix. It has many components dealing with different functionalities. Some of them are:

• ClusterPulse daemon - monitors the matrix, controls the virtual hosts and devices, handles communication with administrative console, manages device monitors and event notification.
   

• DLM daemon - provides a locking mechanism to coordinate server access to shared resources in the matrix.
   

• SANPulse daemon - provides matrix infrastructure for managing the SAN. It coordinates file system mounts, un-mounts, and file recovery operations.