HUAWEI CLOUD tenants use one DDM instance and one RDS instance respectively, and create a logic library, which contains 8 shards.
As the business grows, it is necessary to smoothly expand an RDS instance. After the expansion, how many shards are there on each RDS?

Which of the following types of protocols does the HUAWEI CLOUD ELB four-layer load balancing instance support? (Multiple choice)

Middleware can help users develop and integrate complex application software flexibly and efficiently.

HUAWEI CLOUD application performance management service completes application performance data collection by installing a collection agent on the node where the application is located. The collection agent is based on the industry's Pinpoint open source project and uses JM bytecode enhancement technology to collect application indicators in a non-intrusive manner.
What kind of technology stack does not support the application developed by APM?

With the rapid growth of Internet business, the application architecture is also constantly changing. Which of the following options is not mentioned in the changes of the application architecture?