DDIA Study Notes

Part 1. Foundations of Data Systems

Reliable, Scalable and Maintainable Applications

• Thinking About Data Systems
• Reliability
• Scalability
• Evolvability

Data Models and Query Languages

• Relational Model Versus Document Model
• Query Languages for Data
• Graph-Like Data Models

Storage and Retrieval

• Data Structures That Power Your Database
• Transaction Processing or Analytics?
• Column-Oriented Storage

Encoding and Evolution

• Formats for Encoding Data
• Modes of Dataflow

Part 2. Distributed Data

Replication

• Leaders and Followers
• Problems with Replication Lag
• Multi-Leader Replication
• Leaderless Replication

Partitioning

• Partitioning and Replication
• Partitioning of Key-Value Data
• Partitioning and Secondary Indexes
• Rebalancing Partitions
• Request Routing

Transactions

• The Slippery Concept of a Transaction