Hypermetro Solution Overview - Huawei OceanStor 2000 V3 Series Features Manual

OceanStor V3 Series
HyperMetro Feature Guide for Block
Locking Mechanism
To prevent different host I/Os from being written to the same location in the storage system at
the same time, the storage system uses the locking mechanism to prevent access conflicts. The
host I/O can only be written to the storage system that obtains the locking mechanism.

1.3.2 HyperMetro Solution Overview

This section describes the HyperMetro solution network and provides a logical HyperMetro
network topology to show the mapping relationship and data flows between host applications
and storage arrays.
HyperMetro enables active-active block storage services. LUN data is synchronized between
two data centers in real time and can be accessed by hosts.
If the storage array in one data center malfunctions, host services are switched to the storage
array in the other data center. If the link between two storage arrays in two data centers is
down, only one storage array can be accessed by hosts. The quorum server determines which
storage array continues providing services.
Figure 1-1
Figure 1-1 HyperMetro solution network topology
Storage array A
Issue 05 (2018-01-30)
shows the HyperMetro solution network topology.
Data center A
Switch
Switch
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Host cluster
FC/IP
Switch
Switch
Switch
LAN/WAN
Quorum server
Quorum site
1 Feature Description
Data center B
Storage array B
Switch
Network of hosts and
storage arrays
Same-city network
between data centers
HyperMetro
replication network
Quorum network
Switch
Switch
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