Tools for Testing Cassandra

This text discusses various tools that can be used for testing and troubleshooting Cassandra, a distributed database system. The author highlights the importance of understanding disk performance using tools like hdparm, dd, iozone, and bonnie++. They also emphasize the need to monitor Java heap size with jconsole or jmxterm, and analyze heap dumps with Eclipse Memory Analyzer Tool (MAT). Furthermore, they suggest using nodetool tpstats for monitoring active and pending tasks in a cluster. The author concludes by stressing the importance of visualizing data for better understanding and collaboration, recommending D3.js as a tool for creating great-looking charts that can be easily shared with others.