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Study Material

MongoDB vs. Cassandra

MongoDB and Cassandra are both are NoSQL databases, but they have their own features. The below table will help us to understand the difference between MongoDB and Cassandra:

Features	MongoDB	Cassandra
Database type	Document-based	Wide column-based
Protocol	Use Custom binary (BSON)	Use SQL like CQL3
Fault Tolerance	It has a Master-Slave model for failover with no single point of failure	It has high availability with no single point of failure.
Read / Write operation	It meets a low latency requirement for read requests, at low throughput	It meets a low latency requirement for read requests, at low throughput
Querying	It is a query by example model and can execute complex dynamic queries.	It allows querying by key or key range.
Replication	MongoDB uses a replica set that provides auto-failover and data redundancy.	It is very simple. We just need to mention the number of nodes we want our data copied to, and it automatically handles the rest.
Sharding	Sharding is built-in, but MongoDB shards are replications of multiple servers.	An auto sharding facility is available. Each shard is a server with its data replicated across other servers.
Hadoop Support	It uses MongoDB connector.	Native Hadoop support, including Hive and Pig.

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