3.5.1 MxDB-Oracle-HiAv Installation and Administration Guide

Operations

Introduction

MxDB-Oracle-HiAv provides high availability for database instances and

Net Services listener processes.

MxDB-Oracle-HiAv uses a Virtual Oracle Service, which is a type of

Matrix Server virtual host, 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 MxDB-Oracle-HiAv.

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

for a database is lost:

• Server Failure. 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 for the

Virtual Oracle Service.

• 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.