Scheduling the tasks

VSP One SDS Block narrows the number of passes on the storage side so as not to violate the Windows MultiPath I/O limit.

Introducing tasks to compute nodes (hosts) with Windows is essential to simplify operations against this limitation. For compute nodes with Windows, follow the steps below to register the task scheduler.

The task scheduler registers for initial setup and reexecution by restart. The task scheduler periodically updates the device, allowing it to follow configuration information after failure and capacity balancing.

CAUTION:

Schedule the task so that the task is run when the compute node is logged out for maintenance, or at login and restart after an unexpected shutdown.

From the start menu, select [Administrative Tools], and then [Task Scheduler].

The [Task Scheduler] windows appears.
Select [Task Scheduler Library] in the left side of the window, and then click [Create Basic Task] on the right side of the window.

The [Create Basic Task] windows appears.
Enter a name in [Name] and a description in [Description], and then click [Next].

The [Task Trigger] windows appears.
Select [When I log on], and then click [Next].

The [Action] windows appears.
Select [Start a program], and then click [Next].

The [Start a Program] windows appears.
Specify the following, and then click [Next].
- Program/script: C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
- Add arguments: -windowstyle hidden Update-HostStorageCache
The [Summary] windows appears.
Verify the content, select [Open the Properties dialog for this task when I click Finish], and then click [Finish].

The Properties window for the task appears.

The property settings should be set according to the operation. As a reference, here’s an example of the setting.

On the [General] tab, set security options.

Select between [Run only when user is logged on] or [Run whether user is logged on or not], depending on your operation.

If [Run only when user is logged on] is set, you may not be able to follow the storage-side update while logging out, resulting in access lost.

If the previously specified user accesses the volume while logged out, select [Run whether user is logged on or not] and check [Do not store password. The task will only have access to local computer resource.].

[Run with highest privileges] does not require a check. [Hidden] does not need to be checked. Set the default value for "Configuration for:."

Note:
As a user specified as a trigger, you can click [Edit], and then specify the login user of the Windows host server (used as the compute node) as required.
Select the [Triggers] tab, select a trigger, and then click [Edit].

The [Edit Trigger] windows appears.
Specify the following, and then click [OK].
- Repeat task every: 5 minutes
- for a duration of: Indefinitely
Other settings should be set according to the operation.

The Properties window for the task reappears.
Click [OK].

The [Task Scheduler] windows reappears.
Next, create a task to be run initially. Select the created task, and then select [Export] from the right-click menu to save the task.

The exported task can be saved in any location.
Import the exported task. From the [Actions] menu in the [Task Scheduler] window, select [Import Task], and then specify the task saved in step 11.

This scheduler triggers the task to run in the current login state.

The [Create Task] windows appears.
In the [General] tab, change the name in [Name] and the description in [Description].
Select the [Triggers] tab, select the task you changed in step 13, and then click [Edit].

The [Edit Trigger] windows appears.
Specify the following, and then click [OK].
- Begin the task: At task creation/modification
- Repeat task every: 5 minutes
- for a duration of: Indefinitely
The [Create Task] window reappears.
Click [OK].

The scheduler to be run initially starts.

The [Task Scheduler] windows reappears.

Select [Task Scheduler Library]. Verify that the task you created is displayed and "Status" is "Ready."
Close the [Task Scheduler] window.

Note:
To disconnect the Windows-based compute node from the compute network, delete the created task scheduler. In the [Task Scheduler] window, select the task to be deleted, and then select [Delete] in the right-click menu.