Use of Time in Distributed Databases (part 2): Use of logical clocks in databases

This is part 2 of our "Use of Time in Distributed Databases" series. We will talk about the use of logical clocks in databases in this post. We will consider three different approaches:vector clocksdependency graph maintenanceepoch service In the upcoming posts we will allow in physical clocks for timestamping, so there is no (almost no) physical clocks involved in the systems...
My DOs and DON’Ts of Software Architecture

Photo by Pixabay on PexelsAs the new year approaches, it’s a time of reflection, and this extends into the workplace. So I thought I’d share some of my own personal “do’s” and “don’ts” at work, which I’ve formulated throughout the years. I’ve focused on Software Architecture, since that’s what I’m mainly involved in, but many of these points are relevant to...
A proxy CLI for capturing and inspecting HTTP(S) and WS(S) traffic, with TUI and WebUI.

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Why HNSW is not the answer and disk-based alternatives might be more practical

HNSW (Hierarchical Navigable Small World) has become the go-to algorithm for many vector databases. Its multi-layered graph structure and ability to efficiently navigate vector embeddings make it particularly appealing. However, despite its apparent advantages, HNSW may not be the optimal solution for large-scale and dynamic vector similarity search. In this blog post, we challenge the dominance of HNSW and explore...
AI-Generated Code Requires a ‘Trust and Verify’ Approach

AI is the new frontier, and developers understand now is the time to embrace it if they haven’t already. This undeniable component of software development is changing the landscape of software development as we previously knew it. Adoption is now a table-stakes issue for any organization looking to meet the growing need for software in business. As that need continues to...
Use of Time in Distributed Databases (part 1)

Distributed systems are characterized by nodes executing concurrently with no shared state and no common clock. Coordination between nodes are needed to satisfy some correctness properties, but since coordination requires message communication there is a performance tradeoff preventing nodes from frequently communicating/coordinating.Timestamping and orderingWhy do the nodes, in particular database nodes, need coordinating anyway? The goal of coordination among nodes...

Tag: Azure

Azure Page Blobs vs. Liskov Substitution Principle

Published by Arnon Rotem-Gal-Oz on February 19, 2011

“Liskov Substitution Principle” or LSP is one of the basic principles for proper object orientation. LSP definition is: “Let q(x) be a property provable about objects x of type T. Then q(y) should…