Create a description of a system
tom
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…
Merging files in Scala
I understand that Scala may be used in an ETL context. In ETL, an important element is the merge of two files. We will get data from different sources and…