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Cassandra

Cassandra

Based on the Amazon Dynamo paper Ring topology peer-to-peer, gossip protocol no special nodes Distributed Hash Table eventually consistent, tunable

Use vnodes whenever possible to avoid issues with topology changes, node rebuilds, hotspots, and heterogeneous clusters.

vnodes mean more ranges, which makes it easier to give a range to a new node

Partitioners

cqlsh

port 9042

nodetool

https://docs.datastax.com/en/cassandra/2.1/cassandra/tools/toolsNodetool_r.html

#  Checking node repair
nodetool netstats
nodetool compactionstats

Topologies

Uses ‘snitches’

Per-Query Consistency

ANY/ONE/QUORUM/LOCAL_QUORUM/ALL

Resources

.. todo http://docs.datastax.com/en/cql/3.1/cql/ddl/ddl_when_use_index_c.html http://docs.datastax.com/en/cql/3.1/cql/ddl/ddl_intro_c.html http://www.datastax.com/dev/blog/new-in-cassandra-3-0-materialized-views http://www.datastax.com/dev/blog/2012-in-review-performance http://www.planetcassandra.org/try-cassandra/ http://www.planetcassandra.org/blog/cassandra-native-secondary-index-deep-dive/ https://www.instaclustr.com/blog/2016/01/27/apache-cassandra-compaction/ https://tobert.github.io/pages/als-cassandra-21-tuning-guide.html