Mutant Monitoring Systems (MMS) Day 4 – We Are Under Attack!

In the blog post, the author describes a scenario involving the Mutant Monitoring System (MMS) where Division 3's mutant data centers face cyber attacks, necessitating preparation for disaster scenarios. The post outlines a hands-on exercise using ScyllaDB to simulate a node failure and explains the importance of understanding consistency levels for data accessibility. With a replication factor of three, data remains accessible even if one node goes down, as the default consistency level, QUORUM, allows the system to operate with a majority of nodes. The exercise involves pausing a node, verifying data integrity, and exploring different consistency levels such as ONE and ALL, which dictate how many replicas must acknowledge operations. The post concludes with instructions on adding a new node, repairing the cluster using a nodetool command to ensure all nodes are synchronized, and preparing the system for future attacks while hinting at future analytics opportunities using Apache Zeppelin.