Answer / Rahul Bajpai

HDFS (Hadoop Distributed File System) does not natively support traditional indexing like relational databases. Instead, users can employ secondary indexing solutions such as Apache HBase, Apache Phoenix, or Apache Solr to provide fast data lookup and query capabilities on HDFS data.

Explain HDFS “Write once Read many” pattern?

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Why HDFS performs replication, although it results in data redundancy?

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What is Fault Tolerance in Hadoop HDFS?

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How data or a file is written into hdfs?

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Explain the difference between nas and hdfs?

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Write command to copy a file from HDFS to linux(local).

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Suppose there is file of size 514 mb stored in hdfs (hadoop 2.x) using default block size configuration and default replication factor. Then, how many blocks will be created in total and what will be the size of each block?

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What are problems with small files and hdfs?

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What do you mean by the high availability of a namenode? How is it achieved?

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How to Delete directory and files recursively from HDFS?

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Which classes are used by the hive to read and write hdfs files?

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What is Hadoop Distributed File System- HDFS?

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