Huawei OceanStor 2000 V3 Series Features Manual page 19

OceanStor V3 Series
HyperMetro Feature Guide for File
The quorum server mode is recommended. After a quorum server is deployed, the non-preferred site of
HyperMetro will automatically take over services once the preferred site becomes faulty, without causing
HyperMetro service interruption.
Static Priority Mode
The static priority mode applies to scenarios where no third-place quorum server is deployed.
In a HyperMetro vStore pair, you can set one data center as the preferred site and the other as
the non-preferred site. In the following example, data center A is used as a preferred site.
Table 1-3
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 1-3 Arbitration mechanism in static priority mode
N
o.
1
2
3
Green cable: HyperMetro replication network
Issue 05 (2018-01-30)
NOTE
describes the arbitration mechanism in static priority mode.
NOTE
Fault Fault Type
Diagram
The link
between
two storage
arrays
Data center A
breaks
down.
The storage
array in
data center
B (non-
Data center A
preferred
site)
malfunction
s.
The storage
array in
data center
A
Data center A
(preferred
site)
malfunction
s.
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HyperMetr
o Pair
Running
Status
To be
synchronize
d
Data center B
To be
synchronize
d
Data center B
To be
synchronize
d
Data center B
1 Feature Description
Arbitration
Result
A continues
providing
services
while B
stops.
A continues
providing
services
while B
stops.
Both A and
B stop. You
must
forcibly start
B to resume
providing
services for
hosts.
11