An introduction to Apache Cassandra

A introduction to Apache Cassandra, what is it and
how does it work ? How can it be used with Hadoop
and how does it perorm ?

Transcript

1. Apache Cassandra • What is it ? • How does it work ? • Hadoop • Tools • Architecture www.semtech-solutions.co.nz info@semtech-solutions.co.nz
2. Cassandra – What is it ? • Distributed database management system • Designed for big data • Scalable • Fault tolerant • No single point of failure • Has an SQL like query language • NoSQL www.semtech-solutions.co.nz info@semtech-solutions.co.nz
3. Cassandra – How does it work ? • Organises data into tables • Uses Cassandra Query Language ( CQL ) • Does not allow sub queries or joins • Supports Hadoop Map Reduce • Uses asynchronous masterless replication – Gives low latency • Allows indexing • Allows batch analysis via Hadoop www.semtech-solutions.co.nz info@semtech-solutions.co.nz
4. Cassandra – Hadoop How does Cassandra integrate with Hadoop • Support for Map Reduce • Integration with – Apache Pig – Apache Hive • Can also act as a back end for Solr ! www.semtech-solutions.co.nz info@semtech-solutions.co.nz
5. Cassandra – Tools • User Interface ( GUI ) – Cassandra GUI – Toad for cloud db's • Administration – OpsCentre – Cassandra Cluster Admin • Other – Client libraries – Java, Python, .Net, Perl etc www.semtech-solutions.co.nz info@semtech-solutions.co.nz
6. Cassandra – Architecture • A peer to peer cluster • No single point of failure • Tunable consistency – Is performance or accuracy more important ? • Query by key or key range • Row oriented data storage • Rows can hold up to 2 billion columns www.semtech-solutions.co.nz info@semtech-solutions.co.nz
7. Cassandra – Architecture www.semtech-solutions.co.nz info@semtech-solutions.co.nz