A.The replica set contains multiple replicas. When the primary node fails, DDS can achieve a second-level master/standby switch

B.DDS has a multi-node replica set high-availability architecture, providing extremely high business availability guarantee

C.DDS supports read-write separation, and its write operations can only be performed on the master node in the replica set

D.Through the configuration of VPC, subnet, and security group, DDOS protection uses SSL security access and other multi-layer security protection systems to effectively resist Various malicious attacks to ensure data security

A.HBase

B.HDFS

C.Kafka

D.Spark

A.Mass data migration

B.Mass data transactions

C.Hotspot data cache

D.Database distributed expansion

A.CoAP

B.MQTT

C.HTTP

D.LWM2M

A.RDS Viewer

B.RDS Test

C.RDS Admin

D.RDS DBA