Categories
Data Science Software Development

The concept of map-reduce computing approach on example of Python (declarative vs imperative iteration)

This post is a St. Nicholas’ Day gift for one of my students who asked to explain the concept of map-reduce used to solve computationally complex problems. I will do this, on the example, using Python language, which is known for its brevity. At the same time, I will be happy to test a new […]

Categories
Infrastructure Software Development

Amazon Quantum Ledger Database (QLDB) as a blockchain database as a service

Nowadays, everybody talks about blockchain technologies but not many understand all the concepts behind it. Even less have any practical experience with these issues. Therefore here, we will try to put some light on it. When in June our request for preview access to the QLDB service was approved, we all rubbed our hands together […]

Categories
Infrastructure Maintenance

How to configure psql PostgreSQL client on a production environment to limit the downtime resulting from human mistakes

During systems maintenance, it is often required to conduct working on dev, test, preprod and prod systems. To avoid accidental mistakes leading to downtime it is worth to give a clear warning to operators logging on and working on prods environments. This post is short, for many of you probably obvious (hopefuly), others probably planned […]