Redis is one of the most beloved data stores according to StackOverflow survey. Amazon Web Services offers managed Redis as ElastiCache. It has many features that allow us to build great systems; one of them is replication. How does it work? What is Redis and AWS ElastiCache Redis is a cache. It is a fast in-memory…

Wishing you had one extra hour every day to get more done? Probalby yes. Would you be even more productive if you had 30 hours a day? It seems so, but, actually, I am pretty sure that the answer is negative. The most intuitive idea is that if you had…

How do we know when to stop writing unit tests? When we run out of ideas for tests? When we test all possible scenarios? When the clock hits 5 o’clock? How do we know that we have written enough tests? One commonly used measure is code coverage. What is a…