[Huawei Storage Documentation-FAQs]How Is Load Balancing Implemented for HyperReplication?

Created: May 26, 2018 07:58:24Latest reply: May 30, 2018 06:48:17 959 1 0 0 0

Load balancing within a controller is enabled by default and users cannot modify it manually.
In V300R006C00, load balancing between controllers is disabled by default. In V300R006C10 and later versions, load balancing between controllers is enabled by default. Users can modify it manually by performing the following steps.
- Run change user_mode current_mode user_mode=developer to switch the user view to the developer view.
- Run change private_device proportion enable=? to enable or disable load balancing between controllers.
  - change private_device proportion enable=yes enables load balancing between controllers.
  - change private_device proportion enable=no disables load balancing between controllers.
NOTE:
- For details about the commands, see product-specific Advanced O&M Command Reference.
- Load balancing between controllers is applicable only to asynchronous remote replication.

The following explains load balancing within a controller and load balancing between controllers.

Load balancing within a controller: On the sending end, all the replication links that belong to the same controller have almost the same transmission bandwidth.
Example: Assume that a replication task is created to copy data from array A to array B and the total transmission bandwidth is 200 MB/s. Controller 1 on array A has two replication links, link 0 and link 1.
- If load balancing within a controller is enabled, the bandwidth of both link 0 and link 1 is 100 MB/s.
- If load balancing within a controller is disabled, the bandwidth of link 0 is 200 MB/s and the bandwidth of link 1 is 0 MB/s.
Load balancing between controllers: If the bandwidth usage of the source controller on the sending end exceeds 50% of the total bandwidth, services are switched over to other controllers for load balancing.
Example: Assume that a replication task is created to copy data from array A to array B and the total transmission bandwidth is 200 MB/s. Controller 1 on array A has one replication link, link 0. Controller 2 has one replication link, link 256.
- If load balancing between controllers is enabled, the bandwidth of both link 0 and link 256 is 100 MB/s.
- If load balancing between controllers is disabled, the link under the working controller for HyperReplication occupies the entire bandwidth 200 MB/s. If both the two controllers are working controllers, services of each controller are carried on its own link.

This post was last edited by biubiu666 at 2018-05-26 08:17.