April 2015 Blog Posts (2)

JavaOne

Folks,



Perhaps this is old news for you, but JavaOne San Francisco registration is live. Various saving options are available leading up to the conference, and to take advantage of the current US$600 in savings registration needs to be completed by May 31st, 2015 (11:59pm PT).



I encourage you to read through the registration options by visiting the JavaOne registration site:…

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Added by Michael Levin on April 24, 2015 at 11:00am — No Comments

An Inside Look at the Components of a Recommendation Engine

Recommendation engines help narrow your choices to those that best meet your particular needs.  In this post, we’re going to take a closer look at how all the different components of a recommendation engine work together. We’re going to use collaborative filtering on movie ratings data to recommend movies. The key components are a collaborative filtering algorithm in Apache Mahout to build and train a machine learning model,…

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Added by Carol McDonald on April 13, 2015 at 9:14am — 1 Comment

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Notes

Welcome to Codetown!

Codetown is a social network. It's got blogs, forums, groups, personal pages and more! You might think of Codetown as a funky camper van with lots of compartments for your stuff and a great multimedia system, too! Best of all, Codetown has room for all of your friends.

When you create a profile for yourself you get a personal page automatically. That's where you can be creative and do your own thing. People who want to get to know you will click on your name or picture and…
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InfoQ Reading List

AI Agents Fail Manipulation Tests in Microsoft's Magentic Marketplace Simulation

Researchers at Microsoft, working in collaboration with Arizona State University, have introduced Magentic Marketplace, an open-source simulation environment designed to study how LLM-based agents behave in multi-agent economic systems. The platform addresses a growing need in AI research as autonomous agents gain capabilities in software development.

By Vinod Goje

Presentation: From Dashboard Soup to Observability Lasagna: Building Better Layers

Martha Lambert introduces the "Observability Lasagna" - a four-layer framework (Overview, System, Logs, Traces) focused on connecting layers for an optimized debugging UX. Learn practical tips for instrumentation, visualizing limits, and using event logs/exemplars to shift from general metrics to user-impact focused triaging. Essential for engineering leaders aiming for system reliability.

By Martha Lambert

AWS Disruption Exposes Fragility in Critical Cloud Infrastructure

On October 20, 2025, Amazon Web Services (AWS) experienced a major outage that disrupted global internet services, affecting millions of users and thousands of companies across more than 60 countries. The incident originated in the US-EAST-1 region and was traced to a DNS resolution failure affecting the DynamoDB endpoint, which cascaded into outages across multiple dependent services.

By Craig Risi

The Decisions You Don't Know You're Making: QCon Keynote Explores Hidden Choices in Engineering

Engineering teams make their most consequential decisions not in architecture reviews or sprint planning, but through invisible choices embedded in metrics, defaults, and everyday behaviors. In their QCon San Francisco 2025 keynote, Shawna Martell and Dan Fike challenged the industry's focus on documented decision-making while the decisions that truly shape systems and culture go unrecognized.

By Eran Stiller

Parting the Clouds: The Rise of Disaggregated Systems by Murat Demirbas at QCon SF 2025

Cloud computing is evolving through disaggregation, addressing inefficiencies of traditional architectures by decoupling compute and storage. This shift enhances scalability, fault isolation, and operational simplicity, driven by advancements in networking. As seen in cloud databases such as Amazon Aurora, embracing these principles enables true economic optimization and innovative design.

By Steef-Jan Wiggers

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