Scalable Database Building with Cassandra

What is it that makes Cassandra just so scalable? Certainly, it supports clusters spanning multiple datacenters. Some of the principles it follows are as follows:

1. No single points of failure (Decentralized)
2. Fault tolerance through Replication to multiple nodes, enabling failing nodes to be replaced without data loss
3. High performance (as measured in benchmarking against other NoSQL databases)

The Weather Channel, CERN and Instagram are among the top-billed users of Cassandra.

Apache Kafka

Apache Kafka is a distributed streaming platform. It supports publish, subscribe operations (similar to a message queue) and stores streams of records in a fault-tolerant way.

The basic object in Kafka is an array of bytes with some optional metadata known as the key. Messages may be structured according to a schema (possibly using JSON or XML) although Apache Avro, a serialization framework for Hadoop, is increasingly popular. Avro supports strong typing and schema evolution.

The Real Kafka - Kafka was a write who was born in Prague. His well-known works include "Die Verwandlung" (The Metamorphosis) first published in 1915.

Convergence of Oracle JDK and OpenJDK

Donald Smith at Oracle (Sr. Director of Product Management) announced in 2018 that Oracle JDK and OpenJDK will soon converge with the intent that there are no technical differences in binaries.

What is OJVM?

OJVM is Oracle's database embedded JVM. The code runs in the same memory space as SQL and PL/SQL. It currently supports Java 8.

Polyglot Runtime - GraalVM

Graal is a JIT compiler with multi-language support. It is based on Oracle's JDK8 with JVMCI support. Languages supported include Python, R and Ruby.