Daily Archives: April 14, 2014

HDFS Offline Image Viewer Tool – oiv 3

Usually fsimage files, which contain file system namespace on namenodes are not human-readable. So, Hadoop provided HDFS Offline Image viewer in hadoop-2.0.4 release to view the fsimage contents in readable format. This is completely offline in its functionality and doesn’t require HDFS cluster to be running. It can easily process very large fsimage files quickly and present in required output format. HDFS Offline Image Viewer: Syntax for this command:

Here […]

HDFS Distributed File Copy Tool – distcp 7

HDFS Distributed File copy Hadoop provides HDFS Distributed File copy (distcp) tool for copying large amounts of HDFS files within or in between HDFS clusters. It is implemented based on Mapreduce framework and thus it submits a map-only mapreduce job to parallelize the copy process. Usually this tool is useful for copying files between clusters from production to development environments. It supports some advanced command options while copying files. Below are the […]

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I am a plsql developer. Intrested to move into bigdata.

Neetika Singh ITA