NEC 320Fc User Manual
Page 28
Managing Critical Applications During the Upgrade Process
2-6
Express5800/320Fc: Active Upgrade™ User’s Guide
Related Topics
•
Overview
•
“Software Upgrade Support” on page 2-1
•
“System Prerequisites” on page 2-2
•
“Managing Critical Applications During the Upgrade Process” on page 2-6
•
“Pre-Upgrade Tasks” on page 2-7
Managing Critical Applications During the Upgrade Process
The Active Upgrade console allows you to specify how business-critical applications
are started and stopped during the Active Upgrade process.
If your system runs business-critical applications, such as Microsoft Exchange Server
or SQL Server, these applications can run on only one side of the system—the
Production Side—when you split the system. They must be stopped on the other side—
the Upgrade Side—to prevent resource conflicts and to allow you to proceed with
upgrade tasks. Furthermore, when you merge the system, the same applications must
be stopped on the Production Side and restarted on the Upgrade Side, so you can test
the applications with the newly-upgraded system disk, and possibly commit the
upgrade.
Typically, critical applications are started and stopped automatically by the operating
system. For example, your application might be configured to start as a service in the
Services Control Manager, or as a startup item in the system registry. But these
resources control your applications only when the operating system itself is started or
stopped. In most cases, to minimize downtime, the Active Upgrade console executes
upgrade operations, like split and merge, without restarting the operating system.
Therefore, if you want your applications to start and stop at the appropriate times during
the upgrade process, you must configure the Active Upgrade console itself to control
the applications
Active Upgrade console provides two methods for controlling your critical applications
during the upgrade process. The method you use for each application depends on the
type of application you want to control:
•
Application services