Data Lake is a technology that became very popular because Big Data is a part of modern reality. However, modern databases often do not fit the data that organizations want to store because of various reasons. When should people think about using Data Lakes? In what cases can Data Lakes be used, and when will their use bring some benefits to companies? We introduce the Data Lake view to Big Data processing. We present a new approach to distributed Database System and we propose to use some effective Data tools for databases management. In this article, we analyze how to use this technology, discuss the prospects and possible problems in the implementation of Data Lakes in practice.