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This article mainly explains "what is the difference between the election mechanisms of Kafka, Raft, Zookeeper and RocketMq". The content of the explanation is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "what is the difference between the election mechanisms of Kafka, Raft, Zookeeper and RocketMq"?

Software Election Raft (Tidb)

The election time is staggered with different timeout time, and the request for selecting oneself is sent to other nodes respectively. Until it is recognized by half of the nodes

Kafka

The main principle is to select the master through the atomicity of the single thread of the zookeeper transaction, read the state of the original master node on the zk through the agent control management class (controller), and then select a follower as the leader

Zookeeper

1. An independent thread initiates an election request to all nodes and obtains the transaction id of other nodes. After receiving the reply from other nodes, it obtains the node with the largest transaction id (if the transaction id is the same, then compare the node id), and then use this node to initiate the election request. Until it is recognized by more than half of the nodes

two。 Initiates a request to other nodes to choose their own host, and other nodes compare the transaction id and node id after receiving the request. If you are older than yourself, agree until it is recognized by more than half of the nodes.

RocketMq does not have an election mechanism, and thanks for reading through multiple master nodes to ensure usability. The above is the content of "what is the difference between the election mechanisms of Kafka, Raft, Zookeeper and RocketMq". After the study of this article, I believe you have a deeper understanding of what is the difference between the election mechanisms of Kafka, Raft, Zookeeper and RocketMq. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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