The most stable and battle-hardened major release of Apache Cassandra™—tested by Apple, DataStax, Instagram, Netflix, and dozens others—has arrived. Various innovations and enhancements in Cassandra version 4.0 have resulted in improved performance and reduced costs. The amazing performance boost and lower TCO of Cassandra 4.0 position it as the default platform for enterprises to build fast data experiences for customers that deliver reactive engagement at the point of interaction. 
 
Cassandra 4.0 has increased the number of requests it can process per second by 25% to 70% while reducing the "tail latency" for those requests by a factor of 7; and with the addition of backpressure management, applications can now verifiably achieve peak performance. These improvements are complemented by enhancements to the compaction and repair maintenance process that reduce memory, disk IO, and CPU usage dramatically, resulting in greater system stability. Put all these improvements together and Cassandra 4.0 is faster and cheaper to operate than any previous version. 
 
If you’re considering Cassandra or running an older version, now is the time to jump on the 4.0 bandwagon.

Whitepaper

Cassandra 4.0 Doubles Down on Performance and Reliability to Create Fast Data Customer Experience