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HyperReplication Feature Guide for Block

OceanStor V5 Series V500R007

This document is applicable to OceanStor 5110 V5, 5110F V5, 5300 V5, 5300F V5, 5500 V5, 5500F V5, 5600 V5, 5600F V5, 5800 V5, 5800F V5, 6800 V5, 6800F V5, 18500 V5, 18500F V5, 18800 V5, and 18800F V5. It describes the working principle and application scenarios of the HyperReplication feature (for block). Also, it explains how to configure and manage the feature.
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Application Scenarios

Application Scenarios

The remote replication feature is used for data backup and DR. The typical application scenarios include central backup and DR as well as 3DC.

Different remote replication modes apply to different application scenarios.

  • Synchronous remote replication

    Applies to backup and DR scenarios where the primary site is very near to the secondary site, for example, in the same city (same data center or campus).

  • Asynchronous remote replication

    Applies to backup and DR scenarios where the primary site is far from the secondary site (for example, cross countries or regions) or the network bandwidth is limited.

NOTE:

As for asynchronous remote replication on an iSCSI network, you are advised to use a device such as a security gateway to encrypt links when adding the iSCSI links to ensure data transfer security among storage systems and prevent information leakage.

The remote replication modes are generally determined by distance and bandwidth between sites. Table 1-5 describes the typical application scenarios of remote replication.

Table 1-5 Typical application scenarios of remote replication

Analysis Item

Central Backup and DR

3DC

Scenario characteristics

  • Backup data is managed centrally so that data analysis and data mining can be performed without affecting services.
  • When a disaster occurs at a service site, the central backup site can quickly take over services and recover data, achieving unified service data management.
  • The remote replication mode can be selected for a service site flexibly based on the distance between the service site and the central backup site.
  • Three data centers (DCs) are deployed in two locations. Real-time backup and remote backup are available concurrently.
  • Service data is backed up to the intra-city DR center in real time through a high-speed link.
  • When data in the production center is unavailable, services are quickly switched to the intra-city DR center.
  • If a large-scale disaster occurs at both the production center and DR center in the same city, the remote DR center can take over services and implement DR.

Remote replication mode

Synchronous remote replication or asynchronous remote replication

  • Intra-city: synchronous or asynchronous remote replication
  • Remote: asynchronous remote replication

Maximum distance between primary and secondary sites

Synchronous remote replication: within 300 km

Asynchronous remote replication: no restriction

Synchronous remote replication: within 300 km

Asynchronous remote replication: no restriction

Central Backup and DR

In central backup and DR scenarios, service data distributed in different locations is backed up to the same site for centralized management. When a disaster occurs at a service site, the central backup site can take over services from the service site and recover data. Figure 1-8 shows a central backup and DR scenario.

Figure 1-8 Central backup and DR

Functions of remote replication are as follows:

  • Collects data from service sites 01 to n, takes a snapshot of a secondary LUN, and maps the secondary LUN to a host. The snapshot can be used for data analysis and data mining.
  • Allows the central backup site to take over services when any service site (01 to n) encounters a disaster and switches services back to the service site when the site recovers.
  • Implements real-time backup (using the synchronous remote replication mode) between service site 01 and the central backup site that is 500 m away from service site 01. Performs replication tasks (using the asynchronous remote replication mode) between service site 02 and the central backup site that is 500 km away from service site 02.

3DC

3DC is a DR solution in which three DCs are deployed across two different locations (geo-redundant mode). The three DCs are the production center, intra-city DR site, and remote DR site. The storage series supports the 3DC configuration in the following modes: synchronous + asynchronous or asynchronous + asynchronous remote replication and HyperMetro + remote replication.

NOTE:

For details about the 3DC solution, see the BC&DR Solution Product Documentation (Geo-Redundant).

Cooperation with BCManager eReplication to Implement DR

BCManager eReplication is a DR management software program specially designed for Huawei typical DR solutions. It provides a visualized and process-based platform for simple and fast operations and monitoring, with data consistency, snapshot, and remote replication supported.

Figure 1-9 illustrates how to use BCManager eReplication to deploy a remote replication task. Deploy the BCManager eReplication host in the DR center and install BCManager eReplication Server on the host. Install BCManager eReplication Agent on service hosts and standby hosts in the production center.

Figure 1-9 Using BCManager eReplication to deploy a remote replication task

Figure 1-10 and Figure 1-11 illustrate how to use BCManager eReplication to deploy 3DC. Deploy the BCManager eReplication hosts in DR centers 1 and 2 and install BCManager eReplication Server on the hosts. Install BCManager eReplication Agent on production hosts and standby hosts in the production center.

Figure 1-10 Using BCManager eReplication to deploy a cascaded 3DC solution
Figure 1-11 Using BCManager eReplication to deploy a parallel-connected 3DC solution
NOTE:

For details about how to install, deploy, and configure BCManager eReplication, see the BCManager eReplication product documentation specific to your product version.

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Updated: 2019-07-11

Document ID: EDOC1000181492

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