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OceanStor 2600 V3 Storage System V300R005 HyperMetro Feature Guide 06

"This document describes the implementation principles and application scenarios of theHyperMetro feature. Also, it explains how to configure and manage HyperMetro."
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How Does HyperMetro Implement Link Load Balancing?

How Does HyperMetro Implement Link Load Balancing?

Question

How does HyperMetro implement link load balancing?

Answer

The storage systems support load balancing within a controller and between controllers.

  • Load balancing within a controller: At the transmit end, all the replication links that belong to the same controller have almost the same transmission bandwidth.

    For example, HyperMetro is established between storage arrays A (local) and B (remote) and the total transmission bandwidth is 200 MB/s. Controller A on array A has two replication links, link 0 and link 1.

    • If load balancing within controller A is enabled, link 0 and link 1 each has 100 MB/s bandwidth.
    • If load balancing within controller A is disabled, the bandwidth of link 0 is 200 MB/s and that of link 1 is 0 MB/s.
  • Load balancing between controllers: If the bandwidth usage of a controller at the transmit end exceeds 50% of the total bandwidth, services are switched over to the other controller for load balancing.

    For example, HyperMetro is established between storage arrays A (local) and B (remote) and the total transmission bandwidth is 200 MB/s. Controller A on array A has one replication link (link 0), while controller B has one replication link (link 256).

    • If load balancing between the controllers is enabled, link 0 and link 256 each has 100 MB/s bandwidth.
    • If load balancing between the controllers is disabled, the link on the working controller of HyperMetro occupies the entire 200 MB/s bandwidth. If both are working controllers, each controller carries services on its own link independently.

Load balancing within a controller is enabled by default for HyperMetro and cannot be modified by users.

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Updated: 2018-09-03

Document ID: EDOC1000106183

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