Topic
cassandra
3 articles across 3 sub-topics
Sub-topic
1 article
NoSQL Partitioning: How Cassandra, DynamoDB, and MongoDB Split Data
TLDR: Every NoSQL database hides a partitioning engine behind a deceptively simple API. Cassandra uses a consistent hashing ring where a Murmur3 hash of your partition key selects a node — virtual nodes (vnodes) make rebalancing smooth. DynamoDB mana...
Sub-topic
1 article
Azure Cosmos DB API Modes Explained: NoSQL, MongoDB, Cassandra, PostgreSQL, Gremlin, and Table
TLDR: Cosmos DB's six API modes are wire-protocol compatibility layers over one shared ARS storage engine — except PostgreSQL (Citus), which is genuinely different. Every API emulates its native database incompletely, and those gaps are structural, n...
Sub-topic
1 article
The Dual Write Problem in NoSQL: MongoDB, DynamoDB, and Cassandra
TLDR: NoSQL databases trade cross-entity atomicity for scale — and every database draws that atomicity boundary in a different place. MongoDB's boundary is the document (pre-4.0) or the replica set (4.0+ multi-doc transactions). DynamoDB's boundary i...