During daily maintenance, you can place your TencentDB for MongoDB and CVM instances in the same AZ to lower the network latency. TencentDB for MongoDB multi-AZ instances support free AZ switch, and single-AZ instances support upgrade to multi-AZ instances.
AZ modification doesn't affect instance billing.
AZ modification may lead to primary-replica switch and a momentary disconnection for about 10 seconds; therefore, proceed during the off-peak hours of your business.
- AZ modification may lead to primary-replica switch and a momentary disconnection of about 10 seconds; therefore, proceed during the off-peak hours of your business.
- To avoid increasing latency, after modifying the AZ of the primary node, you need to change the network of the primary node to one in the new AZ and modify its private IP as soon as possible.
If you have selected During maintenance time, do not select Upon modification completion to immediately execute the task before the configured maintenance time; otherwise, a program exception will occur. An initiated task cannot be stopped manually. To stop it, submit a ticket for application.
- Upon modification completion: The task will be executed immediately after the configuration is completed.
- During maintenance time: The task will be executed during the maintenance time period.
After modifying the AZ, switch the VPC subnet to avoid a high access latency. For detailed directions, see Switching Instance Network.