What is a Data Lakehouse?
A data lakehouse is a data management solution that combines the best features of a data warehouse and data lake to accelerate data processing speeds and perform advanced analytics with cost efficiency.
The scalability and flexibility of the data lake merged with the data management and governance capabilities of the data warehouse creating a hybrid data repository for storing, managing and analyzing data.
Key Features of a Data Lakehouse
- Unified and flexible data repository – Data lakehouse provides a single, unified data storage architecture that allows ingestion of structured, semi-structured or unstructured data at relatively low cost while also maintaining structured, schema-enforced data for analytics.
- Performance optimization – With performance optimization techniques, such as indexing, caching, and query optimization, data lakehouses can enable fast and efficient querying, like traditional data warehouses.
- Data governance – Define data access controls, implement auditing, and manage metadata effectively to ensure data quality and compliance.
- Scalability – Similar to data lakes, a lakehouse can scale horizontally to accommodate growing volumes of data.
Benefits of Data Lakehouse
- Store diverse data types – Due to the data lake features, multiple data types can be stored within a single architecture. This flexibility allows storage, access and analysis of data available in diverse formats and applications.
- Cost-effective storage – Data lakehouse often leverages cost-effective cloud-based object storage, reducing storage costs compared to traditional data warehouses. Data can be stored in its native format, avoiding the need for expensive transformations during ingestion.
- Accommodate massive amounts of data – Data lakehouses can scale horizontally to accommodate growing volumes of data. Cloud-based implementations can take advantage of auto-scaling capabilities provided by cloud providers.
- Data governance – Robust data governance features are integrated into data lakehouses, allowing organizations to define and enforce data quality controls. With that in place, the data warehouse architecture allows complex analytics and reporting on large datasets.
Data Lakehouse Architecture
The architecture consists of the following components –
- Data ingestion layer: Within its architecture, the data is pulled in from various sources into the platform. This can include structural data from relational databases, semi-structured data and unstructured data from sources like log files. The data may be ingested without editing in its raw format and stored in a cloud database, forming the data lake element.
- Data transformation layer: Data transformation processes that include ETL or ELT, are performed to clean, enrich and structure the data. The raw data is transformed into a format suitable for storage and analysis in a data lakehouse.
- Data storage layer: Data is stored in a schema-on-read manner which allows for both raw, unprocessed data and structured, curated data to coexist within the same storage system.
- Metadata management and cataloging: Metadata helps users discover and make sense of the data stored in the lakehouse. Metadata management is essential for maintaining a catalog of the available datasets, schemas and data lineage information.
- Data processing layer: SQL-based engines are used for querying and processing data in a lakehouse. To ensure fast query response times, performance optimization techniques like indexing and caching can be employed.
Data Lakehouse vs. Data Warehouse
Data Warehouse – A data warehouse is designed for structured and well-organized data, and it is optimized for fast query performance and business intelligence (BI) reporting. However, it may struggle with accommodating large-scale, unstructured, or semi-structured data because that much volume needs to be properly defined and stay uniform for running advanced analytics.
Data Lakehouse – A data lakehouse is more flexible and cost-effective. It provides a single, centralized repository that can store both raw unstructured data and structured data. This unified approach simplifies data management and reduces data silos within an organization. By providing a scalable and high-performance platform, lakehouses can significantly reduce the time it takes to turn raw data into actionable insights.
Overall, a data lakehouse architecture aims to offer the best of both worlds, allowing organizations to handle diverse data types and complex analytics use cases with agility and performance. Enterprises are increasingly adopting this approach to modernize their data architecture and gain more value from their data assets.Ā« Back to Glossary