Distributed File Systems A distributed file system stores data across a large collection of machines, but provides single file-system view Highly scalable distributed file system for large data-intensive applications. E.g.,10K nodes,100 million files,10 PB Provides redundant storage of massive amounts of data on cheap and unreliable computers Files are replicated to handle hardware failure Detect failures and recovers from them Examples: Google File System(GFS) Hadoop File System (HDFS) Database System Concepts-7th Edition 10.5 ©Silberscha乜，Korth and SudarshanDatabase System Concepts - 7 10.5 ©Silberschatz, Korth and Sudarshan th Edition Distributed File Systems ▪ A distributed file system stores data across a large collection of machines, but provides single file-system view ▪ Highly scalable distributed file system for large data-intensive applications. • E.g., 10K nodes, 100 million files, 10 PB ▪ Provides redundant storage of massive amounts of data on cheap and unreliable computers • Files are replicated to handle hardware failure • Detect failures and recovers from them ▪ Examples: • Google File System (GFS) • Hadoop File System (HDFS)