What is a Data Lake?

A data lake is a central storage vault that holds large data from many sources in a raw, granular format. It can store organized, semi-organized, or unstructured data, which means data can be kept in a more adaptable format for sometime later. While putting away data, a data lake associates it with identifiers and metadata tags for faster retrieval. 

Authored by James Dixon, CTO of Pentaho, the expression “data lake” alludes to the ad hoc nature of data in a data lake, rather than the clean and handled data put away in traditional data warehouse frameworks. 

Data lakes are usually arranged on a group of reasonable and scalable item hardware. This allows data to be unloaded in the lake in case there is a requirement for it later without having to stress over storage capacity. The bunches could either exist on-premises or in the cloud.

A data lake works on a guideline called schema-on-read. This means that there is no predefined schema into which data should be fitted before storage. Just when the data is read during preparing is it parsed and adapted into a schema as required. This feature saves a great deal of time that’s usually spent on characterizing a schema. This also enables data to be put away as is, in any format. 

Data researchers can access, prepare, and analyze data faster and with more accuracy utilizing data lakes. For analytics specialists, this vast pool of data — available in various non-traditional formats — gives the chance to access the data for a variety of utilization cases like slant analysis or fraud discovery.

Both, Data Lakes and Data Warehouses are set up terms with regards to putting away Big Data, however the two terms are not interchangeable. A data lake is an enormous pool of crude data for which no utilization has yet been resolved. A data distribution center, then again, is a store for organized, separated data that has effectively been handled for a particular reason.

Features of a Data Lake 

In a data lake, the data is ingested into a storage layer with minimal transformation while maintaining the info format, construction and granularity. This contains organized and unstructured data. This outcomes in several features, for example, 

Assortment of various data sources, for example, mass data, external data, real time data and many more. 

Control of ingested data and spotlight on reporting data structure. 

Generally valuable for analytical reports and data science. 

However, it can also incorporate an integrated Data Warehouse to give classic management reports and dashboards. 

A Data Lake is a data storage pattern that focuses on availability over all the other things, across the endeavor, across all departments, and for all clients of the data. 

Easy integrability of the new data source.

Contrasts between a Data Lake and Data Warehouse 

While data warehouses utilize the classic ETL measure in combination with organized data in a relational database, a data lake utilizes paradigms like ELT and a schema on read as well as often unstructured data

This makes inflexible and classically planned data warehouses a relic of past times. This greatly accelerates the arrangement of dashboards and analyses and is a decent advance towards a data-driven culture. An implementation with new SaaS administrations from the cloud and approaches, for example, ELT instead of ETL also accelerate the turn of events.


This article explains in the blink of an eye what a data lake is and how it gives your company the adaptability to capture each aspect of business operations in data structure while keeping the traditional data warehouse alive. The advantages over the classic data warehouse are that distinctive data and data formats, regardless of whether organized or unstructured, should have the option to be put away in the data lake. Disseminated data storehouses are subsequently avoided. Use cases from the area of data science and classic data warehouse approaches can also be served. Data Scientists can recover, prepare, and analyze data faster and with greater accuracy.