Azure Data Architecture Guide
This guide presents a structured approach for designing data-centric solutions on Microsoft Azure. It is based on proven practices derived from customer engagements.
The cloud is changing the way applications are designed, including how data is processed and stored. Instead of a single general-purpose database that handles all of a solution's data, polyglot persistence solutions use multiple, specialized data stores, each optimized to provide specific capabilities. The perspective on data in the solution changes as a result. There are no longer multiple layers of business logic that read and write to a single data layer. Instead, solutions are designed around a data pipeline that describes how data flows through a solution, where it is processed, where it is stored, and how it is consumed by the next component in the pipeline.
How this guide is structured
This guide is structured around two general categories of data solution, traditional RDBMS workloads and big data solutions.
Traditional RDBMS workloads. These workloads include online transaction processing (OLTP) and online analytical processing (OLAP). Data in OLTP systems is typically relational data with a pre-defined schema and a set of constraints to maintain referential integrity. Often, data from multiple sources in the organization may be consolidated into a data warehouse, using an ETL process to move and transform the source data.
Big data solutions. A big data architecture is designed to handle the ingestion, processing, and analysis of data that is too large or complex for traditional database systems. The data may be processed in batch or in real time. Big data solutions typically involve a large amount of non-relational data, such as key-value data, JSON documents, or time series data. Often traditional RDBMS systems are not well-suited to store this type of data. The term NoSQL refers to a family of databases designed to hold non-relational data. (The term isn't quite accurate, because many non-relational data stores support SQL compatible queries.)
These two categories are not mutually exclusive, and there is overlap between them, but we feel that it's a useful way to frame the discussion. Within each category, the guide discusses common scenarios, including relevant Azure services and the appropriate architecture for the scenario. In addition, the guide compares technology choices for data solutions in Azure, including open source options. Within each category, we describe the key selection criteria and a capability matrix, to help you choose the right technology for your scenario.
This guide is not intended to teach you data science or database theory — you can find entire books on those subjects. Instead, the goal is to help you select the right data architecture or data pipeline for your scenario, and then select the Azure services and technologies that best fit your requirements. If you already have an architecture in mind, you can skip directly to the technology choices.