Alibaba Cloud Updated ACA-Developer Exam Questions and Answers by indiana

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Due to the way in which SSL encryption is implemented, enabling SSL encryption will significantly increase the CPU usage rate. Enable SSL encryption when there is an encryption requirement for the external network link. The intranet link is relatively safe, and generally no link encryption is required.

If the RDS instance is a multi-node instance, the system will trigger the active/standby switch after the SSL service is disabled.

When using read/write splitting, you can also enable SSL encryption to improve the security of the connection.

It is discovered that an Alibaba Cloud RDS SSL certificate is about to expire, and the validity period needs to be updated, requiring that the certificate be updated, then reinstalled. This will restart the RDS instance.

Use a third-party image creation tool to create an image from the physical server. Upload the image to the ECS console to turn it into a custom image. Then, use the custom image to create ECS instances.

Use SMC(Server Migration Center) to collect data from the origin physical server. Create an intermediate ECS instance on Alibaba Cloud and wait for the data transfer to complete. Then generate a new image directly from that intermediate ECS instance.

Use a third-party image creation tool to create an image from the physical server. The image is then uploaded to Alibaba Cloud Object Storage Service (OSS) for storage. In the ECS console, import that image from OSS, then, create an ECS instance from the custom image.

Centerless distributed architecture

Supports both narrow and wide tables, providing flexible schema functions

Cluster storage, strong expansion of read and write capabilities

Enterprise-level capabilities such as disaster tolerance, backup and recovery, security, and monitoring across data centers