Data Lake

A data lake is a storage repository that holds a vast amount of raw data in its native format from various sources, including structured, semi-structured, and unstructured data.

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Data lake architecture

Data lake architecture is different from traditional data warehouses in that it can store any type of data, including text, images, audio, video, and sensor data. It is a modern approach to storing large amounts of data for efficient analytics.

Data lake architecture is built on the concept of “schema-on-read”, which allows users to search and discover data without having to know the structure of the data beforehand. This is done by separating the data from the structure and schema, making it easier to access and query unstructured data. This also allows for greater flexibility and scalability, as users can add new data sources easily and quickly.

The data lake architecture is also built on the concept of “data democratization" to accommodate all types of analytical workloads. While it addresses the challenge of storing and accessing large volumes of raw data, and allowing multiple analytical workload to execute directly without having to move the data, because of its complexity and lack of governance, it requires a lot technical expertise and therefore, time ans resources, to gain valuable insights into the data.

Data lake and data warehouse

Data lake and data warehouse are two very distinct concepts. Data lakes are a repository of raw data stored in its native format, including structured, semi-structured, and unstructured data. It allows for data to be stored in its original form, and often times is used to store large amounts of data. They are typically used to store data and provide access to a wide range of users, including data scientists and business intelligence professionals. Unlike a data warehouse, a data lake does not require data to be transformed or structured before it is loaded into the repository, and it often use a flat architecture rather than the hierarchical structure of a data warehouse, which allows it to store a wider variety of data types and structures.

Data warehouses, on the other hand, are a managed collection of data designed for reporting and analysis. Data warehouses are populated with data from a variety of sources, which is organized, formatted, and cleansed to enable efficient and effective analysis. Data warehouses are generally used to support business intelligence and decision-making, and are often used to create reports and dashboards for visualizing data.

Although on-premise data lakes can be a more cost-effective solution than cloud data warehouses, the storage and maintenance of cloud data lakes could be costly.

In order to leverage both data lakes and data warehouses for business intelligence, organizations can consider implementing a hybrid system - a data lakehouse. This allows companies to benefit from the scalability and access of data lakes, while taking advantage of the structure and analytical capabilities of data warehouses.

Suggested reading:

Data warehouse, data lake, or data lakehouse

Centralized data management

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