Active Upgrade State Model; Figure 1-6. Active Upgrade State Model - NEC Express5800/320Ma User Manual

Overview of the Active Upgrade Process

Active Upgrade State Model

The state model in
order in which they occur during the Active Upgrade process.

Figure 1-6. Active Upgrade State Model

Commit
Execute
Merge
Split Mode
The state model helps to demonstrate the sequence of events in the Active Upgrade
process, as follows:
1. All upgrade sessions start in the Idle state, where you can run the readiness check
as many times as necessary to verify that your system meets the prerequisites of
the upgrade process. The system continues to run normally, and both sides of the
system continue to be synchronized.
2. When you start an upgrade session, the Active Upgrade console switches to the
PrepareSplit state, during which it runs a final readiness check and additional
background tasks. If the system is ready, the console immediately switches to the
Split state and proceeds to divide the system into two independently running
systems.
1-8 Express5800/320Ma: Active Upgrade™ User's Guide
Figure 1-6 shows all of the possible Active Upgrade states, and the
Finish
Commit
Abort
Merge
Abort
Prepare
Merge
Idle
Finish
Idle
Finish
Abort
Abort
Abort
Split
Prepare
Merge
Check
Readiness
Prepare
Split
Prepare
Split
Execute
Split
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