Cassandra for Developers Training in Greece

This course will introduce Cassandra – a popular NoSQL database.  It will cover Cassandra principles, architecture and data model.

Comfortable with Java programming language and comfortable in Linux environment (navigating command line, editing files with vi / nano).

• Developers / Data architects

• Cassandra architecture & internals
• CQL (Cassandra Query Language)
• Data modeling in CQL
• Using APIs to interact with Cassandra

Cassandra Overview

• Why We Need Cassandra
• High Level Cassandra Overview
• Cassandra Features
• Basic Cassandra Installation and Configuration   

Cassandra Architecture and CQL Overview  

• Cassandra Architecture Overview
• Cassandra Clusters and Rings
• Data Replication in Cassandra
• Cassandra Consistency / Eventual Consistency
• Introduction to CQL
• Defining Tables with a Single Primary Key
• Using cqlsh for Interactive Querying
• Selecting and Inserting/Upserting Data with CQL
• Data Replication and Distribution
• Basic Data Types (including uuid, timeuuid)

Data Modeling and CQL Core Concepts

• Defining a Compound Primary Key
• CQL for Compound Primary Keys
• Partition Keys and Data Distribution
• Clustering Columns
• Overview of Internal Data Organization
• Additional Querying Capabilities
• Result Ordering - ORDER BY and CLUSTERING ORDER BY
• UPDATE and DELETE Queries
• Result Filtering, ALLOW FILTERING
• Batch Queries
• Data Modeling Guidelines
• Denormalization
• Data Modeling Workflow
• Data Modeling Principles
• Primary Key Considerations
• Composite Partition Keys
• Defining with CQL
• Data Distribution with Composite Partition Key
• Overview of Internal Data Organization

Additional CQL Capabilities 

• Indexing
• Primary/Partition Keys and Pagination with token()
• Secondary Indexes and Usage Guidelines
• Cassandra Counters
• Counter Structure and Definition
• Using Counters
• Counter Limitations
• Cassandra collections
• Collection Structure and Uses
• Defining Collections (set, list, and map)
• Querying Collections (Including Insert, Update, Delete)
• Limitations
• Overview of Internal Storage Organization
• Static Column: Overview and Usage
• Static Column Guidelines
• Materialized View: Overview and Usage
• Materialized View Guidelines

Data Consistency In Cassandra 

• Overview of Consistency in Cassandra
• CAP Theorem
• Eventual (Tunable) Consistency in C* - ONE, QUORUM, ALL
• Choosing CL ONE
• Choosing CL QUORUM
• Achieving Immediate Consistency
• Using other Consistency Levels
• Internal Repair Mechanisms (Read Repair, Hinted Handoff)
• Lightweight Transactions (LWT)/ Compare and Set (CAS)
• Overview of Lightweight Transactions
• Using LWT, the [applied] Column
• IF EXISTS, IF NOT EXISTS, Other IF conditions
• Basic CAS Internals
• Overhead and Guidelines

Practical Considerations 

• Dealing with Write Failure
• Unavailable Nodes and Node Failure
• Requirements for Write Operations
• Key and Row Caches
• Cache Overview
• Usage Guidelines
• Multi-Data Center Support
• Overview
• Replication Factor Configuration
• Additional Consistency Levels - LOCAL/EACH QUORUM
• Deletes
• CQL for Deletion
• Tombstones
• Usage Guidelines

The Java Client API 

• API Overview
• Introduction
• Architecture and Features
• Connecting to a Cluster
• Cluster and Cluster.Builder
• Contact Points, Connecting to a Cluster
• Session Overview and API
• Working with Sessions
• The Query API
• Overview
• Dynamic Queries, Statement, SimpleStatement
• Processing Query Results, ResultSet, Row
• PreparedStatement, BoundStatement
• Binding Values and Querying with PreparedStatements
• CQL to Java Type Mapping
• Working with UUIDs
• Working with Time/Date Values
• Working with Batches of SimpleStatement and PreparedStatement
• Dynamic Queries and QueryBuilder
• QueryBuilder Overview and API
• Building SELECT, DELETE, INSERT, and UPDATE Queries
• Creating WHERE Clauses
• Other Query Examples
• Configuring Query Behavior
• Setting LIMIT and TTL
• Working with Consistency
• Using LWT
• Working with Driver Policies
• Load Balancing Policies - RoundRobinPolicy, DCAwareRoundRobinPolicy
• Retry Policies - DefaultRetryPolicy, DowngradingConsistencyRetryPolicy, Other Policies
• Reconnection Policies
• Asynchronous Querying Overview
• Synchronous vs. Asynchronous Querying
• Executing Asynchronous Queries
• java.util.concurrent.Future
• Cassandra ResultSetFuture
• Future Result Processing

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With over 10 years of experience, we have successfully trained professionals from leading organizations across different industries and regions.