Dr. Hadoop: an infinite scalable metadata management for Hadoop—How the baby elephant becomes immortal

Dipayan DEV,Ripon PATGIRI

Fig. 3 System architecture. Physical NameNode servers compose a metadata cluster to form a DCMS overlay network /* File Information mapping of: file or directory path - nodeURL */ public static Hashtable<FilePath, MetaData> fileInfo = new Hashtable<FilePath, MetaData>(); /* Cluster information mapping of: nodeURL and ClusterInfo object */ public static Hashtable<String, ClusterInfo> clusterinfo = new Hashtable<String, ClusterInfo>(); /* Data structure for storing all the NameNode servers */ public Hashtable<NameNode_hostname, Namenode-URL>namenode = new Hashtable<NameNode_hostname, Namenode-URL>();