Big Data Schema Evolution
Schema migrations in the relational world are now common practice. The best practices for evolving a database schema are well known, where a migration gets applied before the code that needs to use it is rolled out. If …
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data
Type All The Things!
Scala is statically typed. Yet we rarely use it to our advantage. For example let’s say you have a function with the signature: def convert(a: Double, b: Double): String Of course, the author hasn’t written a comment, and …
Spark on AWS EMR – The Missing Manual
Apache Spark recently received top level support on Amazon Elastic MapReduce (EMR) cloud offering, joining applications such as Hadoop, Hive, Pig, HBase, Presto, and Impala. This is exciting for me, because most of my workloads run on EMR, …
Apache Spark on EC2
Its easy to get started with Apache Spark. You can get a template for a Scala job using the Typesafe Activator and have it running on a local cluster with a small dataset. You can also use a handy …