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Medallion Architecture: The Key to Superior Data Quality in Lakehouse

By Paige MIllbank - 2023 Oct 25 4 mins read

In today’s data-driven world, businesses rely heavily on data to make informed decisions. With the influx of vast amounts of data, ensuring its quality and processing becomes a daunting task. Traditional data architectures often fall short in meeting these demands. Enter the Medallion Architecture, combined with the Delta Lake Framework in Lakehouse, a solution introduced by Databricks.

The Challenges Medallion Architecture Addresses

Cloud computing, despite its immense potential, poses certain challenges that can hinder organizational growth. Some of these include:

  • Lack of transaction support: Ensuring data integrity during multiple transactions.
  • Enforcing data quality: Filtering out irrelevant or erroneous data.
  • Complexity in data lake operations: Integrating appends, updates, and deletes seamlessly.
  • Data governance issues: Preventing data lakes from turning into unmanageable data swamps.
  • Complex data models: Making data models intuitive and easy to implement.

The Medallion approach not only addresses these challenges but also transforms them into opportunities for organizational evolution.

Delving into Medallion Architecture

Often termed as the “multi-hop” architecture, the Medallion Architecture is a data design pattern that organizes data within a lakehouse. It aims to enrich data progressively as it transitions through each architectural layer, from Bronze to Silver, and finally, Gold.

Bronze Layer (Raw Data)

This foundational layer houses raw data, sourced from various streams and batches. It retains the data in its original state, mirroring the structure of the source system with added metadata columns like load date/time and Load ID.

Silver Layer (Cleansed Data)

Data from the Bronze layer undergoes a transformation in the Silver layer. Here, it’s filtered, cleaned, and validated. Business rules are applied to mold the data into a format suitable for enterprise-level reporting, analytics, and machine learning.

Gold Layer (Enriched Data)

The pinnacle of the architecture, the Gold layer, aggregates and prepares data for business use. It applies data quality standards and business logic to present data in an analytics-friendly format. This layer is pivotal for data and business analysts seeking deep insights.

Advantages of Lakehouse Architecture

Lakehouse Architecture amalgamates data from diverse sources like IoT devices, OnPrem systems, and various databases. It consolidates this data in a lake for analytics and machine learning. Some of its benefits include:

  • Transaction Support: Ensuring data consistency during simultaneous read or write operations.
  • Schema Enforcement: Guaranteeing data quality by rejecting data that doesn’t match the predefined schema.
  • BI Compatibility: Offering robust support for BI tools.
  • Decoupled Storage and Computing: Facilitating scalability with separate storage and compute clusters.
  • Open Standards: Embracing open standards like Parquet and offering APIs for efficient data access.
  • Diverse Data Types: Accommodating structured, semi-structured, and unstructured data.
  • Versatile Workloads: Catering to data science, machine learning, SQL, and analytics.
  • Real-time Streaming: Supporting both batch and real-time data processing.

Seeking Enhanced Data Quality?

If you’re aiming for impeccable data quality, the Medallion Architecture in a lakehouse is the way forward. iLink Digital offers robust data processing techniques, strategies, and roadmaps to deploy this architecture effectively. Explore their service portfolio to harness the power of this innovative architecture.

FAQs

  1. What is the primary purpose of the Medallion Architecture?
    • The Medallion Architecture is designed to organize and enhance data quality within a lakehouse, ensuring it undergoes progressive enrichment through its layers.
  2. How does the Silver layer differ from the Gold layer?
    • The Silver layer focuses on filtering, cleaning, and validating data, while the Gold layer aggregates and prepares data for business analytics.
  3. Why is transaction support crucial in Lakehouse Architecture?
    • Transaction support ensures data consistency, especially when multiple parties are reading or writing data concurrently.
  4. What challenges does the Medallion Architecture address in cloud computing?
    • It tackles issues like lack of transaction support, enforcing data quality, complexities in data lake operations, and more.
  5. How does Medallion Architecture ensure data quality?
    • By making data pass through structured layers of transformations and validations, ensuring only quality data is stored for analysis.

Harness the power of Medallion Architecture and elevate your data processing capabilities to new heights. With structured layers and a focus on quality, it’s the future of data management in lakehouses.

Find more tips & hacks on our Insights pages. Also, be sure to connect with me on LinkedIn.

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