HP P4000 SAN User Manual page 44

Throttling bandwidth
Management groups support bandwidth throttling for data transfers, allowing you to manually
configure bandwidth service levels for shared links.
In the CMC, right-click the management group, and select Edit Management Group. As shown in
Figure 37, you can adjust bandwidth priority from Fractional T1 (256 Kb/sec) to Gigabit Ethernet
values.
Figure 37. Setting the remote bandwidth
Starting VMs at the remote site
After a volume has been remotely copied, it contains the last completed snapshot, which is the most
current data on the schedule.
In the event of a failure at Site A, volumes containing VM data at the remote site can be made
primaries and the SRs reattached. VMs can then be started with the remote volume snapshots.
For more information on this process, refer to Changing the Storage Repository and Virtual Disk UUID.
Note
If Site A is down while the remote site is running the VMs, there is no need
to change UUIDs.
Changing the direction of snapshots
As shown in Figure 38, after Site A has been restored, change the direction of remote snapshots to
resynchronize snapshot data; you can then restart VMs at Site A. However, in the time taken to
complete the snapshot and restart VMs, changes to the original data may have occurred; thus, data
cannot be restored in this manner.
Note
With asynchronous snapshots performed in the other direction, it is
assumed that a restoration may not include data that changed in the period
between the last snapshot and the failure event.
You must accept the potential for data loss or use alternate methods for data synchronization.
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