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Cassandra High Availability

Cassandra High Availability

By : Strickland
4.6 (14)
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Cassandra High Availability

Cassandra High Availability

4.6 (14)
By: Strickland

Overview of this book

If you are a developer or DevOps engineer who understands the basics of Cassandra and are ready to take your knowledge to the next level, then this book is for you. An understanding of the essentials of Cassandra is needed.
Table of Contents (11 chapters)
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Preface
Preface
What this book covers
What you need for this book
Who this book is for
Conventions
Reader feedback
Customer support
Free Chapter
1
1. Cassandra's Approach to High Availability
1. Cassandra's Approach to High Availability
ACID
The monolithic architecture
The master-slave architecture
Cassandra's solution
Cassandra's architecture
Summary
2
2. Data Distribution
2. Data Distribution
Hash table fundamentals
Consistent hashing
Token assignment
Partitioners
Summary
3
3. Replication
3. Replication
The replication factor
Snitches
Consistency conflicts
Balancing the replication factor with consistency
Summary
4
4. Data Centers
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4. Data Centers
Use cases for multiple data centers
Data center setup
Replication across data centers
Summary
5
5. Scaling Out
5. Scaling Out
Choosing the right hardware configuration
Scaling out versus scaling up
Growing your cluster
How to scale out
How to scale up
Removing nodes
Other data migration scenarios
Snitch changes
Summary
6
6. High Availability Features in the Native Java Client
6. High Availability Features in the Native Java Client
Thrift versus the native protocol
Setting up the environment
Connecting to the cluster
Executing statements
Handling asynchronous requests
Load balancing
Failing over to a remote data center
Tying it all together
Summary
7
7. Modeling for High Availability
7. Modeling for High Availability
How Cassandra stores data
Understanding compaction
CQL under the hood
Understanding queries
How collections are stored
Working with time-series data
Designing for immutability
Working with geospatial data
Summary
8
8. Antipatterns
8. Antipatterns
Multikey queries
Secondary indices
Distributed joins
Deleting data
Unbounded row growth
Summary
9
9. Failing Gracefully
9. Failing Gracefully
Knowledge is power
Logging
Monitoring node metrics
When a node goes down
Backing up data
Summary
10
Index
Index

Data center setup

The mechanism to define a data center depends on the snitch that you specify in cassandra.yaml. Take a look at the previous chapter if you need a refresher on the various types of snitches. You'll recall that the snitch's role is to tell Cassandra what your network topology looks like, so it can know how to place replicas across your cluster. While configuring a snitch, it's important to make sure that the host names resolved by the snitch match those in your schema.

With this in mind, let's take a closer look at what configuration looks like for each of the snitch options.

RackInferringSnitch

There really isn't any configuration to be performed on RackInferringSnitch, as long as your IP addressing scheme matches your topology. Specifically, it uses the second, third, and fourth octets to define data center, rack, and node, respectively, as follows:

RackInferringSnitch

This strategy can work well for simple deployments in physical data centers where IP addresses can be...

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