1. Basic Introduction to Etcd Etcd is a distributed Key/Value storage system. Through distributed locks, leader election, and write barriers it achieves distributed coordination, offering highly available, persistent data storage and retrieval services. How it works Every Etcd node stores a complete copy of the data, and at any moment

1. Different Kinds of Storage 1.1 File Storage File storage is storage based on files. When accessing data, you need to provide the corresponding lookup path. It is suitable for services such as FTP and NFS. 1.2 Block Storage Block storage splits data into blocks and stores each part separately. When accessing data, the underlying storage software reassembles these scattered pieces.