All distsys Blog Posts

How to Sync Anything: Building a Sync Engine from Scratch — Part 2 posted Wednesday, April 16, 2025 by Jan Lehnardt CouchDBreplicationsyncdistsysdata

Note: This is part of our series demystifying synchronisation. See our other instalments: How to Sync Anything: Introduction and How to Sync Anything: Building a Sync Engine from Scratch — Part 1

In this part, we will learn how to efficiently find out what data needs to be synchronised.

How to Sync Anything: Building a Sync Engine from Scratch — Part 1 posted Wednesday, April 9, 2025 by Jan Lehnardt CouchDBreplicationsyncdistsysdata

There’s an old saying I paraphrased in this by now ancient tweet[sic]:

“Friends don’t let friends build their own {CRYPTO, SYNC, DATABASE}.” — @janl on September 24th, 2014

What do I mean by that?

How to Sync Anything posted Sunday, April 6, 2025 by James Coglan CouchDBreplicationsyncdistsysdata

In this article I’ll discuss a common naive solution to replication, why it doesn’t work, and what the building blocks of a good solution look like. Having established this theoretical framework, my next article will look at how CouchDB provides many of those building blocks such that replicating from it into any other system is relatively painless.