Kostiantyn's blog

java.lang.OutOfMemoryError: GC overhead limit exceeded  that's what I got yesterday while running my new shining MapReduce job. Ou...

Sometimes the soul wants something really extraordinaly... for example, to write a unit test for Hive query :) Let's how it is possibl...

ElasticSearch is a hot topic today. This is powerful open source search and analytics engine that makes data easy to explore. Several times ...

I've made discovery working on the last task: could you imagine that there are many many many geographical coordinate systems in the wor...

It's very common to use Distributed Cache for Map joins - it gives a possibility to implement extremely fast join of huge dataset with a...

It's common situation in enterprises when developers are working on Windows platform. When you are working with Hadoop, it sounds as a f...

Several months ago I developed Chrome browser plugin for my own needs. As a Hadoop engineer I faced with one problem everyday. I run a lot o...