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  1. Categories >> Software >> Big Data >> Hadoop >> Apache HDFS Hadoop Distributed File System
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What is a Block Scanner in HDFS?

Question Posted / Praveen Kumar Pal

Answer Posted / Praveen Kumar Pal

A Block Scanner in HDFS is a component that checks the integrity of data blocks on DataNodes. It reads each block and verifies its checksum to ensure that it has not been corrupted or tampered with.

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