Category: MongoDB

Should You Migrate Your Reporting Queries From a “General Purpose” DB (MongoDB) to a Data Warehouse (ClickHouse)? (Performance Overview)

In Distributed Systems, MongoDBTags ClickHouse, Columnar Database, MongoDB, OLAP, OLTP, PerformanceJanuary 21, 2022

Migrating Your Reporting Queries From a “General Purpose” DB to a Data Warehouse – Performance Overview. The article focuses on MongoDB and ClickHouse, but most takeaways apply to other “traditional” DBs and “data warehouse” solutions. …

Causal Consistency Guarantees in MongoDB – Lamport Clock, Cluster Time, Operation Time, and Causally Consistent Sessions

In Distributed Systems, MongoDBTags causal consistency, causally consistent sessions, cluster time, distributed systems, lamport clock, MongoDB, operation timeDecember 13, 2021

Vasil Kosturski

Exploring Causal Consistency in MongoDB – the article goes through the concepts of Lamport (Logical) Clocks, Operation Time, Cluster Time, and Causally Consistent Sessions that lead to solving the “Read Your Write” consistency violation. …

Causal Consistency Guarantees in MongoDB – “majority” Read and Write Concerns

In Distributed Systems, MongoDBTags causal consistency, distributed systems, eventual consistency, MongoDB, read your writeNovember 22, 2021

Vasil Kosturski

A code example of how to break the Read You Write consistency in Mongo. Followed by a review of “majority” reads and writes. This will move the discussion towards Causally Consistent Sessions that I’ll cover next. …

Causal Consistency Guarantees – Case Studies

In Distributed Systems, MongoDBTags causal consistency, distributed systems, eventual consistency, MongoDBNovember 4, 2021

Vasil Kosturski

When is Eventual Consistency not sufficient in a Distributed System? This article explores Causal Consistency Guarantees and describes the most popular ones – Read Your Write, Monotonic Reads, Monotonic Writes, Writes Follow Reads. …