Huawei OceanStor V3 Series Features Manual page 30

OceanStor V3 Series
Remote Replication Feature Guide for Block
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3DC
3DC is a DR solution scenario in which three DCs are deployed across two different
locations. The three DCs are the production center, intra-city DR site, and remote DR site.
This version supports the 3DC configuration in the following modes: synchronous +
asynchronous or asynchronous + asynchronous remote replication and HyperMetro + remote
replication.
asynchronous mode.
Figure 1-9 Cascaded 3DC configuration in synchronous + asynchronous mode
Site A
Production
Site B
Intra-city DR
The cascaded 3DC in synchronous + asynchronous mode meets the following service
requirements:
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Issue 06 (2018-01-30)
Implements real-time backup (using the synchronous remote replication mode) from
service site 01 to the central backup site, which is 500 m away from service site 01.
Performs replication tasks (using the asynchronous remote replication mode) from
service site 02 to the central backup site, which is 500 km away from service site 02.
Figure 1-9 shows the cascaded 3DC configuration in synchronous +
Storage System
center
Synchronous
Remote
Replication
Storage System
center
Real-time backup and remote backup of data ensure the reliability of critical service data
and ensure that critical service data has two copies.
The cascaded 3DC has minor impact on the performance of the storage system in the
production center and does not affect host services.
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LUN
Asynchronous
Remote
LUN
Replication
1 Feature Description
Site C
Storage System
Remote DR
center
Optical fiber cable
Network cable
LUN
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