A maintenance window is a scheduled time and duration when maintenance operations may be performed on a managed computer. A maintenance operation is one that changes the state of a computer, causes it to restart, or interferes with a user's ability to operate the computer. For example, installing software and operating system patches, or running a virus scan.
A maintenance window policy defines one or more maintenance windows and is applied to a resource target in the same way as any other policy. These policies provide the maximum flexibility for assigning maintenance windows to computers, without complicating the management of agent settings. If multiple maintenance window policies apply to a single computer, changes to the computer are permitted during any of the maintenance windows.
Using maintenance windows lets you schedule maintenance work on managed computers with minimal impact on work flow and productivity. Also, you can schedule maintenance work on critical servers at different times so no two servers are ever restarted at the same time. A maintenance window may be scheduled for certain times, such as daily, weekly or monthly. The maintenance window may be available indefinitely or restricted to a particular date range.
When you apply a maintenance window to a managed computer, maintenance tasks, such as patches and software deliveries, can only be carried out on them in the scheduled time period. Symantec Management Agents can download software delivery packages any time, but associated programs can be run only during the maintenance windows.
The Symantec Management Agent processes the policy and provides the functionality that solutions use to determine whether a maintenance window is currently open. Functionality is also provided to allow solutions to inform Notification Server that a maintenance task has been performed.
If the Symantec Management Agent is performing a task as part of a job when the maintenance window expires, the maintenance window is automatically extended until all tasks that are contained in the job are completed.