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Nov 14, 2022 11:39:54 AM by Yura Vasilevitski

What is Data Lake and Why Do You Need It

AWS, Cost Optimization, Database, Data Lake

If you work with large amounts of data, you probably know how hard it is to get everything in the right place. Data lake is a solution to this problem. It's a pool of data that you can access from multiple sources. Whenever you need information from your database, all you have to do is call up the data lake and let it provide the information for you. This article explains what a data lake is and why you need it. 

What is Data Lake?

Data Lake is a storage repository that stores all types of data, regardless of the source or format. It is a single, centralized pool of data that anyone in the organization can use.

Data Lake helps to overcome the limitations of the traditional data warehouse. It’s very scalable and has no limits on the data size. It stores structured, semi-structured, and unstructured data. Data Lake can also store metadata about the stored files, such as when they were created and who had access to them at any time.

The Essential Elements of a Data Lake

Here are some essential elements of Data Lakes:

Data management

A Data Lake provides a secure place for storing data for future use. This process allows the movement of data from one location to another using various techniques like batch processing and real-time streaming. This can be done using tools like Hadoop Distributed File System (HDFS).

Securely store and catalog data.

A data lake securely stores all types of unstructured and structured data, including text files, images, video, and audio files. The ability to store and catalog all types of data allows users to search for specific files within the lake using different parameters, such as date range or keywords.


A data lake can give you access to valuable analytics tools that let you analyze large amounts of data in new ways. These tools may include database management systems like Hadoop and Spark, which let you perform analytics on huge volumes of data at scale. They also include visualization tools, which let you create reports about your business using charts, graphs, and other visuals.

Machine Learning

Data Lake allows companies to use machine learning to analyze data and discover trends or patterns humans would have otherwise missed. Machine learning also creates predictive models that give insights into what may happen in the future.

Benefits of a Data Lake

Data lakes have many benefits that make them attractive to businesses, including:


Data lakes have a lower cost than traditional structured databases because they don't require expensive software licenses and hardware. This means they can be easily scaled up or down as needed, which reduces waste and overhead by eliminating unused capacity.


Data lakes are built on a flexible platform that allows you to store any data in any format, not just structured relational data. This makes it easier to integrate disparate systems and applications into one cohesive system that's easy to analyze later.

Data security

Since all your company's raw data is stored in one location, it's easier to control access permissions on individual files or folders within the lake. You can also control who has access by setting up groups within your organization that include or exclude particular people or departments.

Ease of access

Data lakes help you to make sense of your organization's vast amounts of data by storing everything in one place. This makes it easier to analyze trends over time or compare multiple datasets. It also allows you to create new applications using the data stored within them.


Because you can store data in a data lake, its scalability is limitless. If your company grows and you need more storage for your databases, you add more servers and storage space to accommodate the increase in demand.


The Data Lake is not just a standard data warehouse nor a simple file system for unstructured data. It combines the best elements of other technologies by providing a reliable and scalable platform to store data collected from multiple sources. In a nutshell, in Data Lake architecture, information is cleansed, integrated, and analyzed in one place. 


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