The Cassandra PV Archiver 3.0 is intended as a replacement for the Cassandra Archiver for CSS 2.x. While sharing some of the concepts with the Cassandra Archiver for CSS 2.x, the code for the Cassandra PV Archiver 3.0 has actually been rewritten from scratch. The Cassandra PV Archiver 3.0 uses a new, CQL-based storage architecture that provides a significant improvement in performance and also simplifies the structure of the stored data, enabling direct data access for special applications. Unfortunately, this means that data archived with the Cassandra Archiver for CSS 2.x is not compatiable with the Cassandra PV Archiver 3.0 and has to be converted manually.
In addition to the change of the data format, the Cassandra PV Archiver 3.0 brings many new features that make it more scalable and simplify the deployment and operation:
As the list of changes is so vast, even users already familiar with the Cassandra Archiver for CSS 2.x are strongly encouraged to read the complete manual of the Cassandra PV Archiver 3.0.