What does maximum-connections, CPU autoscaling, money and distributed systems have in common? Find out by solving a task: how many servers should you get to run your service, given that maximum allowed average CPU usage can be 80%. Edit it on Draw.io With increasing number of hosts in a fleet, the CPU utilization should be successively smaller. The proportion and exact curve will be different for each sy...

There are certain classes of exciting problems which are surfaced only in a massively distributed systems. This post will be about one of them. It's rare, it's real and if it happens, it will take your system down. The root cause, however, is easy to overlook.

In previous post I’ve explained briefly what actor model is and why it’s so fun. Today we’ll create our ActorSystem instance, learn what it is and send first messages to them. I hope it will be nice and easy start.

Selected Aspects of Document Synchronization in Distributed Systems Two of the projects in which I have participated recently, were distributed systems based on the document replication. Each of them was slightly different, which affected the solutions. In this article I’m going to present briefly the main assumptions and requirements for each of the projects, as well as the implemented solutions. I’m also going to mention a few important problems that we had to deal with.General description of ...