Oh my God: how good is open source
tom
A few days ago, I had to write a Python script that would enable us to write some data to an Oracle database. At first, I had no idea how…
Swaps: currency swap and foreign exchange swap
A little note from the area of financial economics. When going through the databases of a financial institution, one often encounters terms like foreign exchange swap, currency swap, interest swap.…
the Zachman framework
The Zachman framework is a nice example of so-called “IT Entreprise Architecture”. Such approach is directed at a comprehensive approach to the design, implementation and execution of IT strategy within…
Using IDA
IBM launched InfoSphere Data Architect (IDA). This is a data modelling tool that acts as a competitor with Erwin and PowerDesigner. I played a bit with this tool to see…
Create a description of a system
From time to time, I must provide a scheme on how a system works. It is not really to find a technique in which all details can be shown. I…
ElasticSearch: Restful services
As we have seen in a previous post, we communicate with the ElasticSearch server via messages that are sent to a server. On the other hand, the server responds in…
Curl and elasticSearch
One of the most useful utilities is “curl”. This wonderful tool can be used to transfer data from one platform to another. It is relatively easy to install in Windows,…
ElasticSearch
A new and popular nosql database is the Elastic Search database. This database is easy to install en easy to run. But is it easy to insert data and extract…
Scala merging files
In a previous post, I showed how two files can be merged in Scala. The idea was that RDDs were translated as data frames and a join was undertaken on…
Scala and RDDs
RDDs are the basic unit in Scala on Spark. The abbreviation stands for Resilient Distributed Dataset, This shows that we are talking on full data sets that are stored persistently…