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HyperReplication Feature Guide for Block

OceanStor V5 Series V500R007

This document is applicable to OceanStor 5110 V5, 5110F V5, 5300 V5, 5300F V5, 5500 V5, 5500F V5, 5600 V5, 5600F V5, 5800 V5, 5800F V5, 6800 V5, 6800F V5, 18500 V5, 18500F V5, 18800 V5, and 18800F V5. It describes the working principle and application scenarios of the HyperReplication feature (for block). Also, it explains how to configure and manage the feature.
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Planning

Planning

This chapter describes the networks and data you must plan before remote replication configuration.

Network Planning

Planning Rules

Remote replication involves a primary storage device and a secondary storage device. You must plan the networking mode for remote replication and replication links between the storage devices before configuring remote replication. When planning replication links between storage devices, comply with the following rules:

  • Ensure that each controller of the primary storage device has a replication link to the secondary storage device, reducing I/Os forwarded between controllers. Otherwise, ensure that each controller enclosure of the primary storage device has a replication link to the secondary storage device.
  • For a Fibre Channel network, you are advised to zone ports used for replication services in one-to-one relationship and ports used to connect to hosts in one-to-one relationship. In this way, the ports used to connect to hosts are isolated from the ports used for remote replication between storage devices, eliminating the impact on each other.
  • A maximum of 256 available links are supported between a controller and a remote device, and the remote replication feature uses at most eight of them as the replication links between the local and remote devices.

Typical Networking and Zone Planning

  • Figure 2-1 shows a typical network on which two controllers connect to two controllers.
    Figure 2-1 Network of 2-to-2 controllers

On an iSCSI network, ensure that the IP addresses of two storage devices are communicating properly without extra attention to routes. However, zoning is required for Fibre Channel links to pass through switches. Zones must be planned for ports used for replication links (zone quantity varying with the minimum number of ports required), as describe in Table 2-1.

Table 2-1 Zone planning

Zone

Port

LocalAP0_RemoteAP0

(L.0A.P0, R.0A.P0)

LocalAP1_RemoteAP1

(L.0A.P1, R.0A.P1)

LocalBP0_RemoteBP0

(L.0B.P0, R.0B.P0)

LocalBP1_RemoteBP1

(L.0B.P1, R.0B.P1)

  • Figure 2-2 shows a typical network on which four controllers connect to four controllers.
    Figure 2-2 Network of 4-to-4 controllers

On an iSCSI network, ensure that the IP addresses of two storage devices are communicating properly without extra attention to routes. However, zoning is required for Fibre Channel links to pass through switches. Zones must be planned for ports used for replication links (zone quantity varying with the minimum number of ports required), as describe in Table 2-2.

Table 2-2 Zone planning

Zone

Port

LocalAP0_RemoteAP0

(L.0A.P0, R.0A.P0)

LocalAP1_RemoteAP1

(L.0A.P1, R.0A.P1)

LocalBP0_RemoteBP0

(L.0B.P0, R.0B.P0)

LocalBP1_RemoteBP1

(L.0B.P1, R.0B.P1)

LocalCP0_RemoteCP0

(L.0C.P0, R.0C.P0)

LocalCP1_RemoteCP1

(L.0C.P1, R.0C.P1)

LocalDP0_RemoteDP0

(L.0D.P0, R.0D.P0)

LocalDP1_RemoteDP1

(L.0D.P1, R.0D.P1)

  • Figure 2-3 shows a typical network on which the primary and secondary storage systems in a remote replication task have different number of controllers. For example, the primary storage system has four controllers while the secondary storage system has two controllers.
    Figure 2-3 Network of 4-to-2 controllers

On an iSCSI network, ensure that the IP addresses of two storage devices are communicating properly without extra attention to routes. However, zoning is required for Fibre Channel links to pass through switches. Zones must be planned for ports used for replication links (zone quantity varying with the minimum number of ports required), as describe in Table 2-3.

Table 2-3 Zone planning

Zone

Port

LocalAP0_RemoteAP0

(L.0A.P0, R.0A.P0)

LocalAP1_RemoteAP1

(L.0A.P1, R.0A.P1)

LocalBP0_RemoteBP0

(L.0B.P0, R.0B.P0)

LocalBP1_RemoteBP1

(L.0B.P1, R.0B.P1)

LocalCP0_RemoteAP0

(L.0C.P0, R.0A.P0)

LocalCP1_RemoteAP1

(L.0C.P1, R.0A.P1)

LocalDP0_RemoteBP0

(L.0D.P0, R.0B.P0)

LocalDP1_RemoteBP1

(L.0D.P1, R.0B.P1)

Data Planning

  • Capacity planning
    • LUN: The primary LUN and secondary LUN must have the same capacity.
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Updated: 2019-07-11

Document ID: EDOC1000181492

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