Business Platform Team

In Cassandra Lunch #17, we discuss tombstones in Cassandra. Tombstones are a special kind of write that signifies deleted values, stops them from being returned on reads, and eventually allows them to be deleted during compaction. We discuss what tombstones are and why they are used, as well as how they work in practice.

In this blog post, I’ll be walking you through how to create Production and Development environments on Amazon’s Web Service. If you would like an introduction or a refresher on Terraform, please refer to my previous blog post. Without further ado, let’s get into this demo.

In this blog post, we will introduce a few open-source notebooks that we can use to do SQL on Cassandra. At the bottom of the blog, we have an accompanying webinar that you can watch to see a live demo using 2 of the notebooks we discuss in this blog. This is Part 3 of our series on “Doing SQL and Reporting on Apache Cassandra with Open Source Tools”, and Parts 1 and 2 are also linked below. Also, be on the lookout for part 4 coming soon!

Model-selection tests are used to determine which of the two trained machine learning models performs better. The point of model selection tests is to predict which model will generalize better to unseen data and thus comparisons of single test results are not enough. Today we will run through a number of different model selection tests, discuss how they work and how we interpret their results.

In Cassandra Lunch #16, we discuss Cassandra Anti-entropy which is a process of comparing the data of all replicas and updating each replica to the newest version. We also looked at repair and synchronization in Cassandra and how you can prepare for the unexpected.