Thoughts about software development

This post was supposed to be about graph databases and key-value stores but it's going to be only about key-value stores because I got more interested in trying out Redis than Neo4J. Redis Redis is a key-value store that keeps it's database in memory but it also stores it's database on disk after a predefined time and number of changes in database. By default the values are like this: 900 seconds and at least 1 change 300 seconds and at least 10 changes 60 seconds and at least 10 000 changes More on Redis can be found at their website  http://redis.io/  and if your interest to give it a quick try I suggest their online tutorial at  http://try.redis.io/ . Important about querying This is a important detail with key-value stores. In a key-value store the data can be searched only by the key. There are solutions that enable searching by the data, like lucene or solr, but that's a whole different search engine and not the actual key-value store. It mig...

This time I'm writing of my experiences and random thoughts about MongoDB. Just a quick overview and nothing too profound. My MongoDB experiences I've been a part of a development team in two projects that used MongoDB as a database and in addition earlier this year I attended and completed MongoDB for Java developers online course by 10gen, the company behind MongoDB.  Moving from relational databases to document databases isn't easy. I don't have any real experience with functional programming but I'd imagine moving from object oriented programming to functional programming is some what similar experience as moving from relational databases to document databases. Some of the rules are still the same but there are a lot of differences. Flexible schemas MongoDB has flexible schemas meaning that the data model in the collection can be changed per document a any time. I really like this as it gives the opportunity to store only and all the data that...