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Storing and querying trillions of events

This is a second post in series describing our recent infrastructure / architecture transition in Plumbr. The first part focused upon event capturing part of the architecture. In the current post we are analyzing how the captured events are stored and are later accessed via user interface. Again, the post walks you through the motivation for the change & describes ...

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Persistent Storage for Docker Containers

In this week’s Whiteboard Walkthrough, Dale Kim, Sr. Director of Industry Solutions at MapR, describes how MapR addresses the challenge of providing a persistence tier to containers in big data settings. Dale describes a new technology to support Docker containers, the MapR Persistent Application Client Container, or PACC. This lets you deploy containers anywhere, with security enabled, while also providing ...

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Seeing Is Believing

Recently, I’ve done a management workshop on TDD. The audience was developmenet managers and team leads. Most of them did not know TDD. (Actually, most thought they knew what TDD was. But that’s a completely unrelated story.) During my session, I’ve walked them through an example (from Star Wars) and showed the thinking behind it, applying the steps to “real” software ...

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Dockerizing an existing Rails application

Docker is a relatively new and rapidly growing project that allows creating very light “virtual machines”. Prerequisites There are no specific skills needed for this tutorial beyond a basic comfort with the command line and using a text editor. The following services are needed: Docker Hub (Login – Signup if you haven’t ) A Rails application Setting up your computer Getting ...

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Why Elvis Should Not Visit Java

I was recently involved in quite a long Twitter discussion regarding Java’s Optional, type systems that distinguish nullable and non-nullable types and the the Elvis operator, which allows null-safe member selection. The latter was peddled as a killer feature for succinct null-handling, which I strongly disagree with. My opinion on the matter is that without a type system that allows ...

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Build IoT project with Arduino sensor in 3 Steps

This post describes how to create an IoT project using Arduino sensor. You will learn how easy is creating an IoT app that monitors gas in a room using Arduino sensors and send a notification when the gas is over the threshold. We can build a simple gas monitoring system in a few steps. First of all, we assume you ...

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Push Spring Boot Docker images on ECR

On a previous blog we integrated a spring boot application with EC2. It is one of the most raw forms of deployment that you can have on Amazon Web Services. On this tutorial we will create a docker image with our application which will be stored to the Amazon EC2 container registry. You need to have the aws cli tool ...

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