BLOG – Page 10 – Hadoop In Real World

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September 8, 2015

Datanode Block Scanner

Datanode Block Scanner In this blog post we saw how HDFS handles and corrects data corruption in HDFS using checksum. During a write operation the datanode […]
September 6, 2015

Dealing With Data Corruption In HDFS

Dealing With Data Corruption In HDFS Hadoop is designed to store and analyze huge volume of data and with huge volume of data stored in HDFS […]
September 1, 2015

Can Reducer always be reused for Combiner?

Can Reducer always be reused for Combiner? A Combiner function is an optional intermediary function which is executed on the Map phase right after the execution […]
August 30, 2015

HDFS Federation

What is HDFS Federation? Namenode is responsible for the successful operation of HDFS. ¬†Namenode holds the entire metadata of HDFS, which includes information about files and […]