Apache Cassandra Essentials电子书

Apache Cassandra Essentials

Table of Contents

Apache Cassandra Essentials

Credits

About the Author

About the Reviewers

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Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Downloading the example code

Errata

Piracy

Questions

1. Getting Your Cassandra Cluster Ready

Installation

Prerequisites

Compiling Cassandra from source and installing

Installation from a precompiled binary

The installation layout

The directory layout in tarball installations

The directory layout in package-based installation

Configuration files

cassandra.yaml

Running a Cassandra server

Running a Cassandra node

Setting up the cluster

Viewing the cluster status

Summary

2. An Architectural Overview

Background

Cassandra cluster overview

The Gossip protocol

Failure detection

Data distribution

Replication

SimpleStrategy

NetworkTopologyStrategy

Snitches

Virtual nodes

Adding nodes to our cluster

Create keyspace and column family

Summary

3. Creating Database and Schema

A database and schema

Keyspace

Column families

Static rows

Wide rows

A primary key

Partition keys and clustering columns

A composite partition key

Multiple clustering columns

Static columns

Modifying a table

Data types

Counters

Collections

Sets

Lists

Map

UDTs

Secondary indexes

Allowing filtering

TTL

Conditional querying

Conditions on a partition key

Conditions on a partition key and clustering columns

Sorting query results

Write operations

Lightweight transactions

Batch statements

Summary

4. Read and Write – Behind the Scenes

Write operations

CommitLog

Anatomy of Memtable

SSTable explained

SSTable Compaction strategies

Size-tiered compaction

Leveled compaction

DateTiered compaction

Read operations

Reads from row cache

Read operations for row cache miss

Key is in KeyCache

Key search miss both the key cache and the row cache

Delete operations

Data consistency

Read operation

Digest reads

Read repair

Consistency levels

Write operation

Hinted handoff

Consistency levels

Tracing Cassandra queries

Summary

5. Writing Your Cassandra Client

Connecting to a Cassandra cluster

Driver Connection policies

Load balancing policies

Retry policies

Reconnection policies

Reading and writing to the Cassandra cluster

QueryBuilder

Reading and writing asynchronously

Prepared statements

Example REST service using prepared statement

Batch statements

Mapping API

Tracing Cassandra queries using Java driver

Summary

6. Monitoring and Tuning a Cassandra Cluster

Monitoring a Cassandra cluster

Use logging for debugging

Monitoring using command-line utilities

nodetool cfstats

nodetool cfhistograms

nodetool netstats

nodetool tpstats

JConsole

Third-party tools

Tuning Cassandra nodes

Configuring Cassandra caches

Tuning Bloom filters

Configuring and tuning Java

Summary

7. Backup and Restore

Taking backup of a Casandra cluster

Manual backup

Deleting snapshots

Incremental backup

Restoring data to Cassandra

The Cassandra bulk loader

Exporting and importing data using the Cassandra JSON utility

Loading external data into Cassandra

Removing nodes from Cassandra cluster

Adding nodes to a Cassandra cluster

Replacing dead nodes in a cluster

Summary

Index