Database Reference
In-Depth Information
Chapter 13
High Availability, Backup,
and Recovery
by Leighton Nelson
This chapter explores three levels of architecture required for setting up a highly available Oracle Enterprise Manager
Cloud Control 12c environment. It also covers backup and recovery methods for the components of the system,
including the repository database, management service, and agents.
Enterprise Manager Cloud Control 12c provides a complete infrastructure management solution for databases,
applications, and hardware. Having such a key component in the enterprise naturally leads to concerns about
redundancy and high availability. If something does go wrong within the configuration, recovery should occur in the
shortest possible time, thus minimizing disruptions to manageability and monitoring of the enterprise infrastructure.
Maintenance will also be required to apply patches to the Enterprise Manager software components (that is, database,
management service, agents, and operating systems). It is with these concerns in mind that Oracle Enterprise
Manager has been designed to meet the desired service and operating levels by using different high-availability
mechanisms.
High Availability
Each component within the Enterprise Manager architecture should be made highly available to enable a complete
high-availability configuration. The main components to be considered, shown in Figure
13-1
, are as follows:
Management Agent
: Runs on targets and communicates with and sends metrics to the OMS
Management Server
: The heart of the Enterprise Manager that provides Management
Services
Repository
: Stores persistent data from the monitored targets in an Oracle database
Software Library
: Stores files for patching, provisioning, and agent and plug-in deployment
