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

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apache cassandra
Apache Cassandra
  • What is it ?
  • How does it work ?
  • Hadoop
  • Tools
  • Architecture

www.semtech-solutions.co.nz info@semtech-solutions.co.nz

cassandra what is it
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

cassandra how does it work
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

cassandra hadoop
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

cassandra tools
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

cassandra architecture
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

cassandra architecture7
Cassandra – Architecture

www.semtech-solutions.co.nz info@semtech-solutions.co.nz

contact us
Contact Us
  • Feel free to contact us at
    • www.semtech-solutions.co.nz
    • info@semtech-solutions.co.nz
  • We offer IT project consultancy
  • We are happy to hear about your problems
  • You can just pay for those hours that you need
  • To solve your problems