namenode in a sentence

1. An HDFS cluster consists of a single NameNode and several DataNode machines.
2. The master node consists of a Job Tracker, Task Tracker, NameNode, and DataNode.
3. Later versions of Hadoop have high availability with an active / passive failover for the " NameNode ."
4. For example, in older versions of Hadoop the " NameNode " was a single point of failure for the distributed filesystem.
5. The NameNode manages the file system namespace operations such as opening, closing, and renaming files and directories, and regulates file access.
6. It's difficult to find namenode in a sentence.
7. When a client wants to read or write data, it contacts the NameNode and the NameNode checks where the data should be read from or written to.
8. When a client wants to read or write data, it contacts the NameNode and the NameNode checks where the data should be read from or written to.
9. The 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.
10. When Hadoop MapReduce is used with an alternate file system, the NameNode, secondary NameNode, and DataNode architecture of HDFS are replaced by the file-system-specific equivalents.
11. When Hadoop MapReduce is used with an alternate file system, the NameNode, secondary NameNode, and DataNode architecture of HDFS are replaced by the file-system-specific equivalents.
12. HDFS added the high-availability capabilities, as announced for release 2.0 in May 2012, letting the main metadata server ( the NameNode ) fail over manually to a backup.
13. Distributed file systems in clouds such as GFS and HDFS rely on central or master servers or nodes ( Master for GFS and NameNode for HDFS ) to manage the metadata and the load balancing.
14. NameNode and DataNode are software designed to run on everyday-use machines, which typically run under 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.
15. NameNode and DataNode are software designed to run on everyday-use machines, which typically run under 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.
16. In a larger cluster, HDFS nodes are managed through a dedicated NameNode server to host the file system index, and a secondary NameNode that can generate snapshots of the namenode's memory structures, thereby preventing file-system corruption and loss of data.
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