3.1.1 MxDB-Oracle-HiAv Installation and Administration Guide

Introduction

The Database Serving Solution Pack for Oracle HiAv on Linux

(MxDB-Oracle-HiAv) provides high availability for database instances

and Net Services listener processes.

MxDB-Oracle-HiAv uses a Virtual Oracle Service to provide connectivity

to the database. A service monitor is associated with each Virtual Oracle

Service. The monitor periodically checks the health of the matrix servers

and the database instances and listeners via a probe action. The Virtual

Oracle Service and service monitor are created through the Graphical

User Interface supplied with the Solution Pack.

MxDB-Oracle-HiAv takes the following actions in the event that service

for a database is lost:

• Server Failure. PolyServe Matrix Server monitors the health of the

servers in the matrix and provides for application failover if a server

becomes unavailable. In the case of MxDB-Oracle-HiAv, if a server

executing a monitored database goes down, the database and

associated listener will be started on the node configured as the first

backup.

• Database/Listener Service Loss. If a database or listener under

MxDB-Oracle-HiAv control should fail, it will be restarted. Failure is

detected by the MxDB-Oracle-HiAv monitor probe.