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FusionStorage V100R006C30 Block Storage Service Disaster Recovery Feature Guide 03

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This section describes the background and definition of the disaster recovery (DR) service.


With the rapid development of the information technology (IT), storage systems are becoming ever important for key services in a variety of industries. Service interruptions in storage systems may lead to severe economic loss and critical data loss, especially in the communications, finance, medical care, e-commerce, logistics, and government sectors. Therefore, service continuity is critical to the construction of storage systems. Traditionally, one production center and one disaster recovery center are constructed, and the disaster recovery center is active only when the production center fails. Such a disaster recovery system is facing the following challenges:
  • If the production center encounters power supply failures, fires, floods, or earthquakes, services must be manually switched from the production center to the disaster recovery center, during which services are interrupted for a long period of time and service continuity cannot be ensured.
  • The disaster recovery center remains idle for most of the time, lowering resource utilization.

The FusionStorage DR service is born to tackle these challenges.

Currently, the FusionStorage DR service includes two parts: HyperMetro and remote replication. The DR service can be deployed either on an independent node or on a storage node. The former way is called independent deployment, and the latter is called converged deployment.


The two data centers enabled with the HyperMetro feature provided by FusionStorage back up data for each other and are running simultaneously. If a device in one data center becomes faulty or the entire data center fails, services are automatically switched to the other data center, resolving the issues that traditional DR centers cannot carry services and that services cannot be automatically switched. This feature delivers high data reliability and service continuity and improves the resource utilization of the storage systems.

The remote replication feature implements system disaster recovery by periodically synchronizing data between the primary and secondary ends. This minimizes service performance deterioration caused by remote data transmission delay.

Updated: 2019-01-17

Document ID: EDOC1100044928

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