Before data modelling in Hadoop can be discussed, one needs to realise that Hadoop is about files. It is not about tables and relations – it is the files that […]

HBase is a database system that is built on top of HDFS. However the term ‘database’ might be a bit misleading. It is not a traditional SQL database that can […]

Below, I provide some Python code to write an AVRO file. An AVRO file consists of a scheme and a set of records. The records are written in binary format. […]

Below, you will find a listing on how to copy the content of an Oracle table into an avro file. The trick is quite straight forward. A table is read […]

It is possible to send an AVRO file via HTTP. The idea is that one sets up a server process. Once the server process runs, a client call is made. […]

This note describes how we can show the content of an AVRO file with Python. We use python3 as tool here. We use this from an Anaconda framework. I checked […]

In the Hadoop world, one may encounter AVRO files quite often. AVRO file can be used in more or less the same way as text files. They can be read, […]

Today, I played a bit with mounting external drives. Boy, that was more difficult than I thought. The situation was a follows. I had a linux desktop and I wanted […]

Sqoop is used in an Hadoop environment to load data from a relational database upon an Hadoop platform. I have installed an Oracle 12.2 database. I tried to load data […]

Cloudera Manager is a great tool to install a Big Data platform. I worked with this tool and let me share some findings. I realise that we have only a […]