Huawei OceanStor 2000 V3 Series Features Manual page 16

OceanStor V3 Series
HyperMetro Feature Guide for Block
Network
loss or service
interruption.
Quorum network
If communication
between the storage
systems in data centers
A and B is interrupted
or a storage system
malfunctions, the
quorum server
determines which
storage system is
accessible.
Issue 05 (2018-01-30)
Description
Networking
mode
Network
type
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l For Fibre Channel networks:
– The two data centers can be directly
connected using bare fibers if their
distance is within 25 km. Ensure that the
storage and application layers each have
at least two pairs (four wires) of bare
fibers for heartbeat interconnection in the
cluster.
– If the data centers are greater than or
equal to 25 km apart, use dense
wavelength division multiplexing
(DWDM) devices to build the
interconnection network between DCs.
l For IP networks:
– The two data centers can be directly
connected using bare fibers if their
distance is within 80 km. If core switches
are deployed, ensure that at least two
pairs (four wires) of bare fibers are
connected to the core switches for
HyperMetro mirroring at the storage
layer and heartbeat interconnection at the
application layer.
– If the data centers are greater than or
equal to 80 km apart, use DWDM
devices to interconnect them.
l Quorum links support GE and 10GE
networks, but not a Fibre Channel network.
l Quorum links support IPv4 and IPv6
addresses.
l For versions earlier than V300R006C10, the
arbitration link port cannot use a storage
device's management or maintenance
network port. For V300R006C10 and later
versions, the arbitration link port can use a
storage device's management network port,
but cannot use its maintenance network port.
l Network quality and bandwidth
requirements for deploying the network:
– Latency: RTT ≤ 50 ms
– Bandwidth: ≥ 10 Mbit/s
l The HyperMetro replication network,
storage-to-host network, and quorum
network need to be physically isolated and
common ports are not recommended.
1 Feature Description
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