Workflow for operating TrueCopy pairs or Universal Replicator pairs

REST API Reference Guide for Virtual Storage Platform 5000, Virtual Storage Platform E Series, and Virtual Storage Platform G/F Series

Version
93-07-0x
90-09-0x
88-08-10
Audience
anonymous
Part Number
MK-98RD9014-17
The following figure shows the workflow for performing TrueCopy or Universal Replicator operations.
Important:

If you perform operations on or get information about TrueCopy or Universal Replicator pairs, specify Remote-Authorization for the request header.

Creating a pair
Create a pair, and then copy all of the data in the P-VOL to the S-VOL. The pair is synchronized. Create a pair in a new copy pair (mirror), or add a pair to an existing copy group.
Getting information about a copy group (mirror) or pair
For TrueCopy, you can perform operations on the pair in units of copy groups or pairs. For Universal Replicator, perform operations on the pair in units of copy groups (mirrors).
Splitting a pair
Split the pair to suspend data copy.
Resynchronizing a pair
Copy the differential data to resynchronize the pair.
Note: Resynchronization can be performed in units of copy groups or pairs. For TrueCopy, if you want to register pairs to a consistency group during resynchronization, perform resynchronization in units of copy groups. Do not perform resynchronization in units of pairs.
Deleting a pair
Dissolve the pair status of the volumes.

Specifying Job-Mode-Wait-Configuration-Change in the request header

During the creation, splitting, and resynchronizing of pairs, if multiple asynchronous processing requests are issued at the same time, jobs might get stuck and the job status might not change to Completed because data copying takes a long time. In such cases, specify Job-Mode-Wait-Configuration-Change:NoWait in the request header so that the job status changes to Completed without waiting for data copying to finish, and the next job starts. At this time, data copying continues even after job execution ends. To check whether data copying has finished, check the pair status of the target resource instead of the job status. For details about the pair status, see the description of the pair status transitions.