Glenn Engstrand

Author: glenn

Glenn has focused his twenty plus year professional career growing Independent Software Vendors by maturing their Software Development Life Cycle processes and by fostering personal and professional growth in their development staffs. Glenn has delivered software architectures for scalable, enterprise grade systems in J2EE, .NET, LAMP, and Windows DNA.

Clouds Compared

We all know that, in the world of cloud computing, Amazon Web Services is the leader by far. Network intelligence group, Synergy Research, recently released a report revealing that cloud vendors Microsoft, IBM, and Google had increased their market share by 5% (combined). I thought that perhaps it was time to see if there really…

ElasticSearch vs Solr

It’s relatively easy to add advanced, scalable search capabilities to almost any application these days. All you have to do is sprinkle in a few calls to a popular open source search service in your code. That is what I did to the rudimentary news feed micro-service that I have implemented many times. In this…

Node.js vs DropWizard

I have been evaluating various Java based technologies by writing a news feed micro-service in those technologies and blogging about the Developer eXperience. In this blog, I will turn my attention to the first of many non-Java based technologies where I wrote yet another news feed micro-service implementation, this time in the Node.js programming language.…

MySql vs PostGreSql vs Docker

In my last blog, I compared two functionally identical micro-services, one written in Scala and the other in Clojure, in terms of performance under load in AWS. In this blog, I compare the performance of the Scala micro-service under load in AWS running with MySql, running with PostGreSql, and running both with and without Docker.…

Micro-Services: Clojure vs Scala

In a previous post, I compared Scala and Clojure when it came to processing big data. In this post, I am comparing Scala and Clojure in the world of micro-services. Earlier, I had written a rudimentary news feed service in Clojure. Recently, I re-implemented the same news feed service in Scala. Given the same task,…