Databricks Architecture
Databricks Architecture
Here’s a breakdown of Databricks architecture, including core concepts and components:
The Lakehouse Paradigm
The Databricks Lakehouse Platform unifies the best aspects of data lakes and data warehouses into a single platform:
- Data Lake Foundation leverages the flexibility and scalability of cloud storage (like AWS S3, Azure Blob Storage, and Google Cloud Storage) to store structured, semi-structured, and unstructured data.
- Data Warehouse Capabilities: Ensures data reliability, quality, performance optimizations, and ACID transactions through technologies like Delta Lake.
Key Components
- Control Plane
- Managed by Databricks.
- Components: Web Application: The interface for managing Databricks.
- Notebooks: Collaborative coding environments for Python, Scala, SQL, and R.
- Job Scheduler: Automates the execution of data pipelines and workflows.
- REST APIs: Enables programmatic interaction with the platform.
- Metastore: A managed Hive Metastore for storing table metadata.
- Managed by Databricks.
- Data Plane
- You deployed within your cloud account (AWS, Azure, GCP).
- Components:Clusters: Groups of compute nodes (virtual machines) managed by Databricks. You choose the appropriate cluster configuration based on your workload.
- Apache Spark: The core distributed processing engine.
- Delta Lake: An open-source storage layer that brings ACID transactions, schema enforcement, versioning, and optimization to your data lake.
- Photon: Databricks’ optimized, vectorized query engine built on top of Apache Spark, providing even faster performance.
- You deployed within your cloud account (AWS, Azure, GCP).
Data Flow
- Data Ingestion: Databricks integrates with various data sources (databases, streaming sources, cloud storage, etc.) and loads data into the data lake (cloud storage).
- Data Transformation and Processing:
- ETL/ELT Pipelines: To create reliable data pipelines, you can use Spark or Delta Live Tables (DLT).
- Data is prepared & transformed: Structured into Delta Lake tables.
- Data Analytics & Exploration:
- SQL Workspaces: Enable traditional SQL analytics.
- Notebooks: Support data exploration and analysis in multiple languages.
- Machine Learning:
- Databricks ML Runtime: Provides optimized libraries for machine learning.
- Feature Store: Centralized feature management.
- MLflow: Manages the end-to-end machine learning lifecycle.
Security and Governance
- Unity Catalog: A unified governance layer that manages metadata, permissions, and access control across the lakehouse.
- Integration with Cloud Security Tools: Databricks integrates with your cloud provider’s security and compliance features (IAM, encryption, etc.).
Advantages of Databricks Architecture
- Simplicity: A unified platform for data engineering, analytics, and machine learning.
- Performance: Delta Lake and Photon optimize batch and streaming workloads.
- Scalability: Leverages the elasticity of cloud providers.
- Reliability: Delta Lake ensures data consistency and integrity.
- Openness: Based on open-source technologies (Spark, Delta Lake) and supports diverse languages.
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