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How does hdfs ensure information integrity of data blocks squares kept in hdfs?
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Answer Posted / Vishwasana
HDFS ensures data block integrity by using checksums. Each DataNode calculates a checksum for each data block before sending it to the NameNode. The NameNode then computes its own checksum and verifies that it matches with the one received from the DataNode. If there's any discrepancy, the block is retransmitted.n
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