ROIs can help project and product manager to quantify the value of their investment for the company. For internal products, calculating a ROI can be challenging as there are no obvious revenue streams or paying customers. ROI Formula The ROI is the ratio between the net profit and the investment for a…

This article was published as an university assignment in November 2012 Abstract The CAP-Theorem states that when building distributed systems only two of the three desired properties can be reached at a time: availability, consistency and partition tolerance. Network failures are considered to be a given in every distributed system, therefore…

I have been working as a product manager in tech companies for over 6 years and have interviewed plenty of potential candidates. There is still a lot of confusion about what a product manager and where the differences to product owners, project managers etc. lie. One reason for this is…

I recently ran into the challenge that my apache2 was pushed to its limits by web crawlers and bots which manifests itself in the following error: scoreboard is full, not at MaxRequestWorkers.Increase ServerLimit This caused the apache server to freeze and not respond to any requests. Before looking into a…

Use Case You have a MySQL database with one ore more columns of type TEXT containing arbitrary free text. You have many rows and a lot of text in each column and you experience very poor performance when using LIKE statements to perform a full text search: Using LIKE statement A faster way to…

Kubernetes has become the de facto standard in the containerized and cloud-native world. Development teams can leverage various useful abstractions that enable them to build highly scalable and resilient services. Despite all the charm and popularity of Kubernetes, it remains a very complex platform. Operating and maintaining it requires a…