HDFS data replication A given file is broken down into blocks (default block size: 64MB), blocks are replicated across clusters (default number of cop
{"Image DocumentName": "HDFS data replication", "Image ImageDescription": "A given file is broken down into blocks (default block size: 64MB), blocks are replicated across clusters (default number of copies: 3) Namenode uses transaction log to maintain persistent file system metadata. Namenode uses heartbeat to make sure the datanodes are alive, automatic re-replicate and redistribution as needed.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}