Huawei OceanStor 2000 V3 Series Features Manual page 19

OceanStor V3 Series
HyperMetro Feature Guide for Block
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Black cable: HyperMetro replication network
Quorum Server Mode
In quorum server mode, the heartbeat network determines whether the storage arrays are
working properly. If a malfunction occurs, each data center sends an arbitration request to the
quorum server, and only the winner continues providing services.
The quorum site supports two quorum servers for V300R006C10 and later versions. The two
quorum servers work in active/standby mode. Once the active quorum server is faulty, the
system automatically switches to the standby quorum server to execute the arbitration
function.
In a HyperMetro pair, you can set one data center as the preferred site, which takes
precedence in arbitration, and the other as the non-preferred site. In the following example,
data center A is used as a preferred site.
mechanisms when one and two quorum servers are deployed, respectively.
You can set the Recovery Policy for HyperMetro pair failures by Modifying HyperMetro Pair Properties.
l Automatic: The system automatically synchronizes data for data recovery.
l Manual: You must manually synchronize data for data recovery.
Table 1-4 Arbitration mechanism in single-quorum-server mode
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Issue 05 (2018-01-30)
Fault Example
HyperMetro Pair
LUN
Data center A
NOTE
Fault Example
Quorum server
HyperMetro Pair
LUN
Data center A
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Fault Type
The storage
array in data
LUN
center A
Data center B
(preferred
site)
malfunctions.
Table 1-4
Fault Type
The quorum
server breaks
down.
LUN
Data center B
1 Feature Description
HyperM Arbitration Result
etro Pair
Running
Status
To be Both A and B stop.
synchroni You must forcibly
zed start B to resume
providing services
for hosts.
and Table 1-5 describe the arbitration
HyperM Arbitration Result
etro Pair
Running
Status
Normal Both A and B
continue providing
services.
NOTE
HyperMetro
automatically
switches to static
priority arbitration.
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