Revision as of 13:04, 27 December 2013 edit Rabab BOUZIANE (talk \| contribs) 73 edits →HDFS ← Previous edit		Revision as of 13:04, 27 December 2013 edit undo Rabab BOUZIANE (talk \| contribs) 73 edits →HDFS Next edit →
Line 83: An HDFS cluster consists of a single NameNode and several Datanode machines. A nameNode, a master server, manages and maintains the metadata of storage DataNodes in its RAM. DataNodes manage storage attached to the nodes that they run on. The NameNode and Datanode are software programs designed to run on everyday use machines.These machines typically run on a GNU/Linux OS. HDFS can be run on any machine that supports Java and therefore can run either a NameNode or the Datanode software .<ref> {{harvnb\|Azzedin\|p=2\|id= Azzedin}}</ref>. More explicitly, a file is split into one or more equal-size blocks except the last one that could smaller. Each block is stored in multiple DataNodes. Each block may be replicated on multiple DataNodes to guarantee a high availability. By default, each block is replicated three times and that process is called "Block Level Replication".<ref> {{harvnb\|Abzetdin Adamov\|p=2\|id= Adamov}}</ref>

Distributed file system for cloud: Difference between revisions