What is a data mesh?
Data mesh is an architectural pattern for implementing enterprise data platforms in large, complex organizations. It helps scale analytics adoption beyond a single platform and a single implementation team.
The need for analytics isn't new. Organizations have always needed to analyze business performance, and have done so using computers since their introduction. Around the 1980's, organizations started to build data warehousing solutions by using databases specifically for decision support. These solutions served organizations well for a long time.
However, as business changes and with more and more diverse data being generated, data warehousing solutions that use relational databases might not always be the best solution. In the 2000's, big data was introduced as a common term. New solutions that allow analysis of large volumes of diverse data generated with great velocity were quickly adopted. This includes technology like data lakes and scale-out solutions that analyze large quantities of data.
In recent years, many organizations successfully use modern architectural and analytical patterns that combine data warehousing technologies and more recent big data technologies.
However, some organizations encounter issues when deploying analytical solutions using this pattern. These solutions are commonly still implemented as monolithic solutions, where a single team is the platform provider and the team doing data integration. This can work for smaller organizations and organizations that have a high degree of centralization from a team setup perspective. However, using only a single team often creates a bottleneck in larger organizations. This bottleneck causes a huge backlog, with parts of an organization having to wait for data integration services and analytical solutions.
This pattern grows more common as organizations adopt modern data science solutions. Many data science solutions require more data than traditional business intelligence solutions did in the past.
The recent switch to using microservices as an application development pattern is another driver of long backlogs around data integration because it increases the number of data sources.
Having a single team handling all of data ingestion on a single platform in a large organization can also be problematic. One team rarely has experts for every data source. Most organizations are decentralized and distributed from a business perspective. Different business units and departments handle different parts of the operation, so data experts are usually spread out across various sectors.
A new architectural pattern called data mesh was introduced a couple of years ago to solve these problems. Data mesh's goal is to let distributed teams to work with and share information in a decentralized and agile manner.
Data mesh is a technical pattern that also requires organizational change. The benefits of a data mesh approach are achieved by implementing multi-disciplinary teams that publish and consume data products.
The following concepts are foundational for understanding data mesh architecture:
- Data domains
- Data products
- Self Service Platform
- Federated Governance
Data domains are the foundation of data mesh. The concept of data domains comes from Domain Driven Development, a paradigm often used in Software development to model complex software solutions. In data mesh, a data domain is a way to define boundaries around your enterprise data. Domains can vary depending on your organization, and in some cases, you can define domains around your organization. In other cases, you might choose to model data domains based on your business processes or source systems.
There are three aspects to data domains:
Your chosen boundaries render themselves to long term ownership. They exist over a long period of time and have identified owners.
Domains should match reality, not just theoretical concepts.
Your domains need to have atomic integrity. If areas have no relationship with each other, don't combine them in a domain together.
For more information about data domains and how you should define them, see What are data domains?.
Data products are another important component of data mesh. Data products aim to take product thinking to the world of data. In order for your data product to be successful, it needs to provide a long term business value to the intended users. In data mesh, a data product involves data, code assets, meta data, and related policies. Data products can be delivered as an API, report, table, or dataset in a data lake.
A successful data product must be:
- Usable: Your product must have users outside the immediate data domain.
- Valuable: Your product must maintain value over time. If it doesn't have long-term value, it won't succeed.
- Feasible: Your product must be feasible. If you can't actually build it, the product won't be a success. Your product must be feasible from both a data availability and a technical standpoint.
The code assets of a data product include code that generates it and code that delivers it. It also includes pipelines used to create the product and the product's final report.
For more information about data products, see Cloud-scale analytics data products and data applications in Azure.
For specific guidance on using data mesh, see What is a data product?.
Self Service Platform
A core of data mesh is having a platform that allows the data domains to build their data products on their own. They need the ability to define their data products by using the tools and processes that are relevant for their users without having a strong dependency on a central platform or a central platform team. In a data mesh, you have autonomous teams developing and managing autonomous products.
While using decentralization and alignment with business users that understand your data, you'll also have generalists working on your platform. Because of this, you can't have specialized tools that require specialist knowledge to operate be the core foundation of your mesh-based platform.
You can successfully implement your self-serve platform by adopting the practices outlined in Design considerations for self-serve data platforms.
When you adopt a self-serve distributed data platform, you must place an increased emphasis on governance. Lack of governance leads to silos and data duplication across your data domains. Federate your governance, as people who understand the governance need exits in your domain aligned teams and data owners.
To create your federated governance, implement automated policies around both platform and data needs. Use a high degree of automation for testing and monitoring. Adopt a code-first implementation strategy to handle standards, policies, data products, and platform deployment as code.
For more information on implementing federated governance aspects, see Data Governance Overview.
Data mesh can be an effective way to implement enterprise data platforms, but it isn't the best solution for all organizations. Data mesh requires autonomous teams that can work independently. It works best in large, complex organizations that need to scale their analytics adoption beyond a single platform and implementation team and has independent business units.
When using data mesh, take special care when implementing your governance so you don't create silos. Always keep product thinking for data at the core of your implementation to ensure success.
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