Before You Start

Application Scenarios

You can change specifications of a CBH instance to meet your business needs.

This document applies to specification changes of a single-node CBH instance.

To change specifications of a primary/secondary CBH instance, click Service Tickets in the management console and submit a service ticket to contact technical support.

Change Process

This document provides guidance for the system administrator admin to change specifications of a CBH instance. The general steps are as follows: Back up the CBH system data before the change; change the instance specifications; restore the CBH system configurations; and verify that the configurations for the original and new CBH systems are consistent.

Figure 1 Specification change process

Restrictions on Changing Specifications

The specifications change includes changes on the system function edition and asset specifications. For details, see Instance Specifications. Specifications can only be increased but cannot be decreased. The details are as follows:

• Edition: The edition of a CBH instance can only be changed from the standard to the professional, but cannot be changed from the professional to the standard.
• Asset specifications: include assets, concurrent requests, CPU, memory, and data disks. Asset specifications can only be scaled up. For example, the number of assets can be changed from 50 to 100, but cannot be changed from 100 to 50.
  

  • Changing specifications has no impact on the bandwidth and traffic of the EIP bound to the instance.
  • The default capacity of the system disk is 100 GB. Changing specifications does not affect the system disk but expands data disk capacity.
  • CBH historical edition provides only functions of the standard edition. To change its specifications, click Service Tickets in the upper right corner of the management console and submit a service ticket for technical support.
  • Change rules:

    Standard edition: A standard edition can be changed to another standard edition as long as the new one has a larger asset quota than the original. A standard edition can also be changed to a professional edition as long as the professional edition has an asset quota no less than the original edition does.

    Professional edition: A professional edition can be changed to another professional edition as long as the new one has a larger asset quota than the original.

Precautions for Changing Specifications

• Software version

  To make the functions of the profession edition take effect, the CBH system software version must be V3.2.16.0 or later, or the CBH system cannot be upgraded even the specifications are changed.

  If the CBH system software version is earlier than V3.2.16.0, upgrade the software version.

• System data backup and restoration

  Before you change specifications, back up important system data to prevent system data loss caused by change failures.

  After the specifications are changed, reload the backup data to the system to quickly restore the system configurations.

• Specification change time

  The entire specification change process includes preparation, background upgrade, and verification after the change. The process takes about 60 minutes. It takes about 30 minutes to change the backend specifications. During this period, close the CBH system, which will interrupt the CBH system service.

  To reduce the impact on the system running, change specifications during off-peak hours.