Horizontal scaling for real time server monitoring with high availability

Abstract

Server Density is a SaaS tool which helps monitoring infrastructures. It provides a unified interface via web, mobile and public API to manage instances across cloud providers and data centres so it can send alerts when things go wrong. Server Density combines real time metrics from the internals of the servers and the applications running on them with uptime and performance measured from locations around the world. It works with all existing tools and architectures without forcing to do things a certain way so everything can get up and running in minutes. This document covers the redesign of the SaaS service from the point where the data is collected by the system until alerts are sent to the users. The goal, prepare the system for a near future grow allowing us to grow horizontally by adding more servers without having to change the app.