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Explain how cassandra writes changed data into commitlog?

Question Posted / gangesh chand


Explain how cassandra writes changed data into commitlog?..

Answer / Deep Ranjan Tiwari

Cassandra writes changed data into a commit log first. The commit log is a sequential write-ahead log (WAL) that stores all mutations in an ordered, immutable sequence. Once a mutation is written to the commit log, it's acknowledged as durable and can be applied to SSTables, thus ensuring data consistency.

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