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About Apache Cassandra
Understanding the architecture
Database internals
Planning a cluster deployment
Installing
Configuration
Initializing a cluster
Operations
Cassandra tools
Troubleshooting
Release notes

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Apache Cassandra™ 3.x

About Apache Cassandra
Documentation for developers and administrators on installing, configuring, and using the features and capabilities of Apache Cassandra scalable open source NoSQL database.
Understanding the architecture
Important topics for understanding Cassandra.
Database internals
Topics about the Cassandra database.
- Storage engine
  A description about Cassandra's storage structure and engine.
- How Cassandra reads and writes data
  Understanding how Cassandra stores data.
- Data consistency
  Topics about how up-to-date and synchronized a row of data is on all replicas.
  - How are consistent read and write operations handled?
    An introduction to how Cassandra extends eventual consistency with tunable consistency to vary the consistency of data read and written.
  - How are Cassandra transactions different from RDBMS transactions?
  - How do I accomplish lightweight transactions with linearizable consistency?
    A description about lightweight transactions and when to use them.
  - How do I discover consistency level performance?
    Use tracing to discover what the consistency level is currently set to, and how it affects performance.
  - How is the consistency level configured?
    Consistency levels in Cassandra can be configured to manage availability versus data accuracy.
  - How is the serial consistency level configured?
    Serial consistency levels in Cassandra can be configured to manage lightweight transaction isolation.
  - How are read requests accomplished?
    The three types of read requests that a coordinator node can send to a replica.
  - How are write requests accomplished?
    How write requests work.
Planning a cluster deployment
Vital information about successfully deploying a Cassandra cluster.
Installing
Various installation methods.
Configuration
Configuration topics.
Initializing a cluster
Topics for deploying a cluster.
Operations
Cassandra operation topics, such as node and datacenter operations, changing replication strategies, configuring compaction and compression, caching, and tuning Bloom filters.
Cassandra tools
Topics for Cassandra tools.
Troubleshooting
Release notes
Release notes for the Apache Cassandra 3.x.

Data consistency

Topics about how up-to-date and synchronized a row of data is on all replicas.

How are consistent read and write operations handled?
An introduction to how Cassandra extends eventual consistency with tunable consistency to vary the consistency of data read and written.
How are Cassandra transactions different from RDBMS transactions?
How do I accomplish lightweight transactions with linearizable consistency?
A description about lightweight transactions and when to use them.
How do I discover consistency level performance?
Use tracing to discover what the consistency level is currently set to, and how it affects performance.
How is the consistency level configured?
Consistency levels in Cassandra can be configured to manage availability versus data accuracy.
How is the serial consistency level configured?
Serial consistency levels in Cassandra can be configured to manage lightweight transaction isolation.
How are read requests accomplished?
The three types of read requests that a coordinator node can send to a replica.
How are write requests accomplished?
How write requests work.

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