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Data in the commit log is purged after its corresponding data in the memtable is flushed to an _________

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Data in the commit log is purged after its corresponding data in the memtable is flushed to an _________

(a) SSHables

(b) SSTable

(c) Memtables

(d) None of the mentioned

This question was addressed to me by my school principal while I was bunking the class.

I'm obligated to ask this question of Cassandra with Hadoop in chapter ZooKeeper, Sqoop and Cassandra of Hadoop

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Correct choice is (b) SSTable

Easiest explanation: SSTables are immutable, not written to again after the memtable is flushed.

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