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What is wal and hlog in hbase?

Question Posted / deepak


What is wal and hlog in hbase?..

Answer / Neeraj Kumar Gupta

WAL (Write Ahead Logging) and HLog (HBase Log) are mechanisms used in HBase for handling writes. WAL acts as a safety net, recording all changes to the database before they are actually applied to ensure data integrity in case of failures. HLog is a file that stores this log of writes.

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