Grokking the System Design Interview, Volume II
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Replication

Let's explore Cassandra's replication strategy.

Each node in Cassandra serves as a replica for a different range of data. Cassandra stores multiple copies of data and spreads them across various replicas, so that if one node is down, other replicas can respond to queries for that range of data. This process of replicating the data on to different nodes depends upon two factors:

  • Replication factor
  • Replication strategy

Replication factor

The replication factor is the number of nodes that will receive the copy of the same data

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A

Amey Naik

· 5 years ago

"Each keyspace in Cassandra can have a different replication factor."

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A

Amey Naik

· 5 years ago

" The replica sent to Server 4 will have a hint in its metadata that suggests which node was the intended recipient of the replica (in this case, Server 1)"

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