Huawei OceanStor 2200 V3 - Page 29

Analysis Items Central Backup and DR 3DC
Remote replication mode Synchronous remote
replication or asynchronous
remote replication
l Intra-city: synchronous
or asynchronous remote
replication
l Remote: asynchronous
remote replication
Maximum distance
between primary and
secondary sites
Synchronous remote
replication: within 200 km
Asynchronous remote
replication: no restriction
Synchronous remote
replication: within 200 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
Service site 01
Service site 02
Service site n
...
Primary
LUN 01
Host
...
Central backup site
...
Secondary
LUN 01
Secondary
LUN 02
Secondary
LUN n
Remote replication
session 01
Synchronous
Remote replication
session 02
Remote replication
session n
Asynchronous
Asynchronous
Snapshot
n
Snapshot
02
Primary
LUN 02
Primary
LUN n
Functions of remote replication are as follows:
l 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.
l Allows the central backup site to take over services when any service site (01 to n)
encounters a disaster and switch services back to the service site when the site recovers.
OceanStor V3 Series
Remote Replication Feature Guide for Block
1 Feature Description
Issue 06 (2018-01-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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