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Huawei SAN Storage Host Connectivity Guide for Windows

HUAWEI SAN Storage Host Connectivity Guide for Windows Servers
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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
HyperMetro Working Modes

HyperMetro Working Modes

Typically, HyperMetro works in load balancing or local preferred mode. These modes are valid only when the storage system and host both use ALUA. You are advised to set the host's path selection policy to round-robin (this is mandatory if HyperMetro works in load balancing mode).

HyperMetro storage arrays can be classified into a local and a remote array by their distance to the host. The one closer to the host is the local array and the other is the remote array.

Table 6-2 describes the configuration methods and application scenarios of the typical working modes.

Table 6-2 HyperMetro working modes

Working Mode

Configuration Method

Application Scenario

Load balancing mode

  1. Enable ALUA on the host and set the path selection policy to round-robin.
  2. Configure an ALUA-supporting switchover mode for the initiators on both HyperMetro storage arrays. If multiple initiators are assigned to a host, this should be done for each of the initiators.
  3. Set the path type of the initiators on both storage arrays to optimal.

The distance between both HyperMetro storage arrays is less than 1 km, such as when they are in the same equipment room or on the same floor.

Local preferred mode

  1. Enable ALUA on the host. It is advised to set the path selection policy to round-robin.
  2. Configure an ALUA-supporting switchover mode for the initiators on both HyperMetro storage arrays. If multiple initiators are assigned to a host, this should be done for each of the initiators.
  3. Set the path type of the initiators on the local array to optimal and those on the remote array to non-optimal.

The distance between both HyperMetro storage arrays is greater than 1 km, such as when they are in different locations or data centers.

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Updated: 2019-08-22

Document ID: EDOC1000150159

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