Performance Evaluation of NoSQL Databases 2021: Couchbase Server, DataStax Enterprise (Cassandra), and MongoDB

This report evaluates and compares the throughput and latency of three popular NoSQL databases across four different workloads and three cluster configurations.

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    Why read this?

    NoSQL systems were developed to meet the increasing scalability and agility requirements of modern high-load applications. Each NoSQL database has its own strengths and weaknesses, so it is crucial to know these distinctions to identify the optimal solution for a particular scenario.

    This study evaluates the latency and throughput of Couchbase Server v6.6.0, MongoDB v4.2.11, and DataStax Enterprise v6.8.3 (Cassandra) under four workloads:

    • an update-heavy workload that simulates typical actions of an e-commerce solution user
    • a short-range scan workload that simulates threaded conversations
    • a pagination workload that simulates a selection by field with pagination
    • a JOIN workload with grouping and ordering that simulates a selection of complex child-parent relationships with categorization

    The comparison was conducted on three cluster configurations: 4, 10, and 20 nodes. The Yahoo! Cloud Serving Benchmark was used as the default tool for evaluation consistency. The performance results are supported by seven tables and four diagrams.

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