You can now manage a large number of Grids using the attach and detach operations. Grid(s) that are detached from the Multi-Grid Master remain operational. You can attach and detach at any point of time. Grid does not contact Master Grid when it is disconnected. In this state, there will be no communication between the Grid and the Master Grid, but it remains joined with the Master Grid. You can again attach the Grid to the Multi-Grid Master to re-establish communication. Establishing connection between a Grid and a Master Grid is termed as attach and disconnecting their connection is termed as detach.
You need to have appropriate permissions to perform the attach and detach operations. For more information on permissions, /wiki/spaces/mgmadminguide/pages/911181481. You must first validate your credentials against a Grid in your User Profile to gain appropriate access permissions. For more information, see /wiki/spaces/mgmadminguide/pages/911180119. Validating your credentials against a Grid allows you to perform the attach and detach operations in the Multi-Grid Manager.
You can save a copy of the Grid data during the attach and detach operation as a snapshot. These snapshots are stored on an external storage server. For more information, see /wiki/spaces/mgmadminguide/pages/911183748. You can also save a snapshot as a template and apply to a Grid to reset its configuration. You can manage snapshot information using Snapshot Manager. For more information, see /wiki/spaces/mgmadminguide/pages/911183218.
The maximum number of Grids that a Master Grid can support for attach and detach operation is based on the NIOS appliance model. An error message is displayed to indicate that you are not allowed to continue attach operation further. The Master Grid logs an entry with the Grid name, date, and time if you try to attach beyond the maximum limit.

Table 6.1 NIOS appliances and the number of Grids it supports

Attaching a Grid Immediately
Before attaching a Grid, make sure that the Grid is joined with the Master Grid and it is working. For more information, see /wiki/spaces/mgmadminguide/pages/911183060.
Do the following to attach a Grid to a Master Grid:

1. Log in to the Master Grid.
2. From the Grid tab, select the List tab.
3. In the toolbar, move the pointer on the Attach drop down list and then click Immediate.
4. In the Immediate Attach Confirmation message box, click OK to begin the attach operation.
   The Connection Status displays Attaching when the attach operation is in progress. This status continues till the attach operation fails or succeeds. The Connection Status column in the Grid panel updates to Attached to confirm that the appliance has successfully attached to the Master Grid.

Tip: Alternatively, you can use the Action icon to perform Attach.

Schedule Attaching a Grid
You can schedule the attach operation for a future date and time.

1. Log in to the Master Grid.
2. From the Grid tab, select the List tab.
3. In the toolbar, move the pointer on the Attach drop down list and then click Schedule.
4. In the Schedule Grid Attach panel, complete the following:
   • Attach Now: Select this to have the appliance perform the task when you save the entry.
   • Attach Later: Select this to schedule the task for a later date and time. This is selected by default when there is no scheduled task associated with the object. Complete the following:
     • Start Date: Enter a date in YYYY-MM-DD (year-month-day) format. The appliance displays today's date.You can also click the calendar icon to select a date from the calendar widget.
     • Start Time: Enter a time in hh:mm:ss AM/PM (hours:minutes:seconds AM or PM) format. You can also select a time from the drop-down list by clicking the time icon.
     • Time Zone: Select a time zone for the scheduled date and time from the drop-down list. This field displays the time zone of the browser that the admin uses to log in to Multi-Grid Manager.
     • Duration: Enter the duration and specify the unit of duration. Select either Days or Hours from the drop down list to specify the duration format. The connection status will be Attaching through this duration. The actual connection status will be displayed only after this duration. This is useful when connectivity to the Grid may not be available immediately. However, it will be available at some period of time during the duration period.
5. Click Schedule Attach.

Tip: Alternatively, you can use the Action icon to perform Schedule Attach.

Detaching a Grid Immediately

You can detach an attached Grid. Ensure that the Grid is online and attached. Do the following to detach a Grid from a Master Grid:

1. Log in to the Master Grid.
2. From the Grid tab, select the List tab.
3. In the toolbar, move the pointer on the Detach drop down list and then click Immediate.
4. In the Immediate Detach Confirmation message box, click OK to begin the detach operation.

The Connection Status will display Detaching when the detach operation is in progress. The Connection Status column in the Grid panel will be updated to Detached to confirm that the appliance has successfully Detached from the Master Grid.

Note: If you perform the Leave operation in the Grid Manager while it is detached from the Multi-Grid Manager, the Connection Status in the Multi-Grid Manager will be Detached. To attach this Grid again, you first join the Grid to the Multi-Grid Master and then perform the attach operation. For more information, see /wiki/spaces/mgmadminguide/pages/911183060 /wiki/spaces/mgmadminguide/pages/911183060.

Schedule Detaching a Grid

You can schedule the detach operation for a future date and time.

1. Log in to the Master Grid.
2. From the Grid tab, select the List tab.
3. In the toolbar, move the pointer on the Detach drop down list and then click Schedule.
4. In the Schedule Grid Detach panel, complete the following:
   • Detach Now: Select this to have the appliance perform the task when you save the entry.
   • Detach Later: Select this to schedule the task for a later date and time. This is selected by default when there is no scheduled task associated with the object. Complete the following:
     • Start Date: Enter a date in YYYY-MM-DD (year-month-day) format. The appliance displays today's date.You can also click the calendar icon to select a date from the calendar widget.
     • Start Time: Enter a time in hh:mm:ss AM/PM (hours:minutes:seconds AM or PM) format. You can also select a time from the drop-down list by clicking the time icon.
     • Time Zone: Select a time zone for the scheduled date and time from the drop-down list. This field displays the time zone of the browser that the admin uses to log in to Multi-Grid Manager.
     • Duration: Enter the duration and specify the unit of duration. Select either Days or Hours from the drop down list to specify the duration format. The connection status will be Detaching through this duration. The actual connection status will be displayed only after this duration. This is useful when connectivity to the Grid may not be available immediately. However, it will be available at some period of time during the duration period.
5. Click Schedule Detach.

Tip: Alternatively, you can use the Action icon to perform Detach and Schedule Detach.

Connection Status

The Connection Status column indicates the operational status of the Grid and a general description of its current operation. The status icon can be one of the following: