Chapter 3 Introduction to file sharing introduction of file sharing system

Chapter 3 Introduction to file sharing introduction of file sharing system 1) Remote Sync (rsync) is a simple file sharing implementation method. Each node in the cluster has at least one copy of data, and rsync is used for synchronization between copies. Because the data required by the node is stored locally, this method is highly available without spof. Applicable scenarios: The data volume is small and the update frequency is not frequent. This method can be used. You can use this method to index files.
2) Network File System (NFS) is only a standard for network file sharing and uses RPC for communication. The storage node outputs local files through NFS, while other nodes load the file system output by the storage node to the local file system. NFS has two major disadvantages: poor performance: because all file access must go through the network and NFS server, when the access traffic is large, both network bandwidth and NFS servers are bottlenecks in the system. Single point of failure: if the system of the NFS server is invalid or the network is invalid, data cannot be obtained from other nodes.
3) Global File System (GFS) is a real-time file system that includes the communication protocols between the server and the client. It uses the lock mechanism to implement shared data update control, you can Virtualize a physically separated storage device into a storage device and balance the access load.
4) intermezzo is a newer File System. It incorporates the original file system design concepts and adds many intelligent processing technologies, such as log update, automatic data backup, and image integration.
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