HP XP Array Manager Software - Manual (Page 229)

9 Managing tasks
This module describes how to manage tasks.
About tasks
Tasks are submitted to perform specific functions, such as to allocate or create volumes, or to group
storage resources. For tasks that you or other users submit, task status and task results display in a
task list.
The method for submitting tasks and the tasks you can run differ depending on the task type. There
are three types of tasks in XP7 Command View AE:
• CVAE Tasks
CVAE tasks are tasks that are submitted using HP XP7 Command View Advanced Edition.
Typically, you schedule CVAE tasks to run at a time that is best suited for your storage system en-
vironment, such as during a period of low storage system activity. Resources connected to a task,
such as volumes and parity groups, are reserved so that other tasks that use these resources do
not run at the same time. The status of each registered task changes when the task finishes by
completing successfully, failing, or stopping. Until a registered task finishes, you should not perform
any other tasks on any volumes included in the task.
From the Tasks & Alerts tab, CVAE Tasks list, depending on the status of the task, you can:
• Cancel tasks that are in Waiting status
• Stop migration tasks or data placement profile tasks
• Move finished tasks to the CVAE Task History tab
You cannot restart deleted tasks or tasks that have been moved to the CVAE Task History tab.
Additionally, CVAE tasks that have been moved to the history are automatically deleted in order
beginning from the oldest when the number of tasks exceeds 100,000.
• Reschedule tasks that are in Waiting status
• Delete completed tasks
• Restart failed or stopped tasks
To restart a task, it must meet the requirements that allow it to be restarted. Restarted tasks in-
herit the same configured values that were initially set when the task was registered and sub-
mitted. The configuration of the resource might have changed between the time when the task
was initially submitted and when it is restarted, so when restarting a task, verify the configuration
to determine whether you can restart it.
• Receive email notification of the completion of migration tasks by specifying an email address
when submitting migration tasks. Email notification is sent when the task completes, either by
completing successfully, failing, or stopping, which makes it unnecessary to manually monitor
the progress of a task. Use email notification in cases where you want to verify the results for
a task, when it is necessary to contact a server administrator or application administrator re-
garding changes to storage system settings, or when you submit a task that could take a long
time to complete.
• System Tasks
User Guide 229