Viewing pair synchronization rates

You can check the percentage of data that is synchronized between the P-VOL and S-VOLs. HTI’s synchronization rate shows the rate that S-VOL data matches that of the next new generation of the S-VOL. If the S-VOL is the latest one, the synchronization rate is computed by comparing the S-VOL with the P-VOL.

The synchronization rate is a rough value, and can have a large margin of error. If the P-VOL is written to in the configuration of multiple generation (the configuration between the P-VOL and S-VOLs is 1:N), the synchronization rates for only the S-VOL of the newest generation decrease. And if the S-VOL is written to, only the synchronization rates of written generation decrease.

The following figure shows how to monitor the synchronization rates.

During the HTI pair restoration process, the pair synchronization rate may not be up to date. The task must complete for the rate to be up to date.

For more information about restoring HTI pairs, see Restoring Thin Image pairs.

Prerequisite

You have the Storage Administrator (Local Copy) role.

Navigate to the Local Replication window.

In Hitachi Command Suite:

On the Resources tab, click Storage Systems, and then expand the storage system tree.

Right-click the target storage system, and then select Local Replication.

In Device Manager - Storage Navigator:

In the Explorer pane, click Storage Systems, expand the storage system tree, expand Replication, and then click Local Replication.

In the Local Replication window, select a P-VOL in the TI Primary Volumes tab or a snapshot group in the Snapshot Groups tab.

From the Action menu, select Local Replication > Operate TI Pairs.

In the TI Pairs window, select the pair for which you want to monitor synchronization rates and then click More Actions > View Pair Synchronization Rate.

To check a pairs’ status and ensure the data is current, click Refresh.

The latest synchronization rates are shown.