Network
Description
Networking
mode
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Quorum servers are supported but quorum
disks are not.
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You are advised to deploy the quorum server
at a third-place site. If there is no third-place
site, you are advised to deploy the quorum
server at the preferred site. In this case, the
quorum server and related devices should
have uninterruptible power supply (UPS)
protection.
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A dual-switch network is recommended. A
GE/10GE port on each controller of a
storage array is connected to the third-place
quorum server and the service network ports
on the quorum server are connected to two
storage arrays, ensuring that the quorum
server is connected to all controllers of each
storage array.
If a controller houses only one quorum port,
connect controller A and controller C to
switch 1 on IP network segment 1 and
connect controller B and controller D to
switch 2 on IP network segment 2.
If each controller has two quorum ports,
connect the first quorum port on each
controllers to switch 1 and configure IP
network segment 1. In addition, connect the
second quorum port on each controller to
switch 2 and configure IP network segment
2.
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Huawei Enterprise Cloud (HEC) can be used
as a quorum server.
When the HEC is used as the quorum server,
apply for a VM (including the CPU,
memory, disk, and OS). The VM
specifications are the same as those of the
quorum server. Apply for 2 Mbit/s exclusive
bandwidth and one elastic IP address for
each disk array.
1.3.3 Arbitration Mechanism
If the link between the two data centers breaks down, they can no longer be synchronized and
only one will continue providing services. HyperMetro supports two arbitration modes to
determine which data center continues providing services and ensure data consistency:
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Static priority mode is used when there is no quorum server available.
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Quorum server mode is used when quorum servers have been deployed.
OceanStor V3 Series
HyperMetro Feature Guide for File
1 Feature Description
Issue 05 (2018-01-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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