Deployment principle of HDFS in a FusionInsight cluster

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NameNodes and ZooKeeper Failover Controllers (ZKFCs) are deployed on two control nodes that work in active/standby mode. JournalNodes are deployed on at least three nodes and each node reserves a copy of backup data. It is recommended that at least three DataNodes be deployed on data nodes.

Other related questions:
What are the deployment principles of HDFS?
NameNodes and ZooKeeper Failover Controllers (ZKFCs) are deployed on two control nodes that work in active/standby mode. JournalNodes are deployed on at least three nodes and each node reserves a copy of backup data. It is recommended that at least three DataNodes be deployed on data nodes.

Reliability principle of Redis clusters
For proper master and slave relationships and to ensure high data reliability, instances in a Redis cluster must meet the following conditions: 1. Distribution on at least three nodes. 2. Deployment in master/slave mode. A pair of instances cannot be installed on the same node. 3. Master Redis instances on each node must be less than half of the total number of master instances in the entire Redis cluster.

What is the FusionInsight cluster?
A cluster is a computer technology that enables multiple servers to work as one server. It is deployed to improve the stability, reliability, and data processing or service capabilities of the system. For example, use of clusters helps prevent single point of failures (SPOFs), supports storage sharing and load sharing, and improves system performance.

Definition of cluster in the FusionInsight system
A cluster is a computer technology that enables multiple servers to work as one server. It is deployed to improve the stability, reliability, and data processing or service capabilities of the system. For example, use of clusters helps prevent single point of failures (SPOFs), supports storage sharing and load sharing, and improves system performance.

Host naming rule in a FusionInsight cluster
A host name can contain digits 0-9, letters a-z (lowercase and uppercase), and hyphens (-), but cannot contain only digits. The host name must be unique.

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