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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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Impact and Restrictions

Impact and Restrictions

This section describes impact and restrictions of the remote replication feature.

Application Restrictions

  • The remote replication feature of this storage series does not support direct data replication with a storage device from another vendor.
  • 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.
  • Because of the LUN identification mechanism used by hosts' operating systems and volume managers, do not map the primary and secondary LUNs of a remote replication pair to the same host. For example, in Oracle ASM, hosts distinguish between LUNs by ASM disk headers and may wrongly identify the primary and secondary LUNs as the same LUN, resulting in data loss on the two LUNs.
  • During the creation of a remote replication pair, a LUN mapped to a host cannot be used as the secondary LUN in the pair.
  • The ports for the replication links between storage devices cannot be the same as those for the connections between hosts and storage devices or be used as bond ports.
  • The maximum data transmission distance supported by synchronous remote replication is 300 km, and the maximum data transmission distance supported by asynchronous remote replication is not restricted.

Compatibility

When using the remote replication feature, ensure that the host operating system, multipathing software, and the remote storage system are compatible with each other. You can query the compatibility using OceanStor Interoperability Navigator.

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Updated: 2019-07-11

Document ID: EDOC1000181492

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