Hp LeftHand P4000 Virtual SAN Appliance Software User Manual download pdf (Page 17)

5. Copy the remote snapshot from the temporary PrimeSync management group to the existing

remote Site B management group.

6. Disassociate the temporary PrimeSync management group from the remote Site B management

group. For more information, see “Disassociating remote management groups” (page 31).

7. Delete the temporary PrimeSync management group.

8. Set up the desired Remote Copy relationship, such as configuring a schedule to create remote

snapshots of the volume from the primary Site A to remote Site B management group.

PrimeSync ensures that the proper relationship is established between the original primary

volume and the remote site. Subsequent remote snapshots from the primary site to the remote

site are incremental.

NOTE: Use the initial snapshot that you used for the temporary PrimeSync management group

copy, to create the second Remote Copy or the schedule to create remote snapshots of the volume.

You are now setting up the Remote Copy that goes from primary site A directly to remote site B

which maintains that relationship going forward.

For more information on PrimeSync, see the “Application Note: SAN/iQ Remote Copy PrimeSync

— Creating Initial Copy” at

http://www.hp.com/support/manuals.

Select Storage→Disk Storage Systems and then select HP LeftHand P4000 SAN Solutions.

Viewing a list of remote snapshots

View a list of remote snapshots associated with management groups, clusters, volumes, or snapshots.

1. In the navigation window, select a cluster to view its list of remote snapshots.

2. Click the Remote Snapshot.

The report in the Remote Snapshot tab lists management groups and all the snapshots. The

other columns show status information about the remote snapshots. For more information, see

“Monitoring remote snapshots” (page 19).

Setting the remote bandwidth

The remote bandwidth sets the maximum rate for data transfer between management groups. The

copy rate is equal to, or less than, the rate set.

To control the maximum rate of data transfer to a remote snapshot, set the remote bandwidth on

the management group that contains the remote snapshot which is the remote management group.

When setting the remote bandwidth, you can choose from a list of common network types, or

calculate a custom rate, based on your particular requirements.

Selecting remote bandwidth rate

You may either select a preset speed from a list of standard network types or calculate a custom

speed based on your specific requirements. Remember that the speed is the maximum rate at which

data copies.

• Defaults setting— When setting remote bandwidth, selecting Defaults allows you to choose

from a list of common network types.

• Custom setting— The custom setting for remote bandwidth defaults to 32,768 KB, or about

4 MB. Use the calculation tool to identify a desired bandwidth setting. For example, if you

have a T1 line, and you want to set the remote bandwidth to 12% of that capacity, you can

use the calculation tool to find the correct value, 189 KB.

Working with remote snapshots 17

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