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OceanStor 18500, 18800, and 18800F Storage System V100R001C30 Remote Replication Feature Guide 09

This document describes the remote replication feature, in terms of the implementation principle, application scenario, configuration process, and reference information.
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Introduction

Introduction

After a remote replication is established between the production center and the DR center, initial synchronization is automatically started to replicate data from the production center to the DR center.

In actual application scenarios, the amount of data in the production center is large (up to a terabyte level), but the data transmission bandwidth is limited between the DR center and the production center. As a result, it takes a long time for initial synchronization to complete. Performing initial synchronization using the external storage system can greatly reduce the initial synchronization time.

Figure A-1 shows the process of using the external storage system to perform initial synchronization for a remote replication.
Figure A-1  The process of using the external storage system to perform initial synchronization

The process in Figure A-1 is as follows:
  1. Replicate data from the production center to the external storage system.
  2. Move the external storage system to the DR center.
  3. Replicate data from the external storage system to the storage system of the DR center.
  4. Start the remote replication form the production center to the DR center.
Methods for performing initial synchronization for a remote replication using the external storage system vary with provider of the LUN copy feature:
  • Method 1: Use the snapshot feature of the production center and the LUN copy feature of the production and DR centers and create LUN copies in the production center and the DR center respectively.
  • Method 2: Use the snapshot feature of the production center and the LUN copy feature of the external storage system and create LUN copies on the external storage system.
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Updated: 2019-01-28

Document ID: EDOC1000077758

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