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Modifying AZ Deployment

Last updated: 2022-01-18 16:31:25

This document describes how to switch the instance deployment mode between single-AZ and multi-AZ in the TDSQL-C for MySQL console.
Upgrading from Single-AZ to Multi-AZ
1. Log in to the TDSQL-C for MySQL console and click a cluster name in the cluster list or Manage in the Operation column to enter the cluster details page.
2. In the Availability Info module on the cluster details page, click Modify after Deployment Mode.
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3. In the pop-up window, select Yes for Multi-AZ Deployment, select the secondary AZ, and click OK.
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4. When the cluster status becomes Running, you can view the information of the primary and secondary AZs on the cluster details page.
Downgrading from Multi-AZ to Single-AZ
1. Log in to the TDSQL-C for MySQL console and click a cluster name in the cluster list or Manage in the Operation column to enter the cluster details page.
2. In the Availability Info module on the cluster details page, click Modify after Deployment Mode.
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3. In the pop-up window, select No for Multi-AZ Deployment and click OK.
Note: 
Only the secondary AZ can switch between single-AZ and multi-AZ deployment mode, but the primary AZ cannot.
FAQs
Where can I query the AZ information of a cluster?
In the AZ column in the cluster list.
In Basic Info > Region/AZ on the cluster details page.
In Availability Info on the cluster details page.
Will my cluster run normally during the AZ modification?
During the start and modification operations of the AZ modification task, normal access to read-only and read-write instances will be unaffected.
The database connection addresses (cluster’s read-write address and read-only address) will remain unchanged after the AZ is modified, so you can continue to access your cluster at these addresses.