💥YTsaurus: a system for storing and processing Yandex's Big Data has become open-source
YTsaurus is an open source distributed storage and processing platform for big data. This system is based on MapReduce, distributed file system and NoSQL key-value database.
YTsaurus is built on top of Cypress (or Cypress) - a fault-tolerant tree-based storage that provides features such as:
a tree namespace whose nodes are directories, tables (structured or semi-structured data), and files (unstructured data);
support for columnar and row mechanisms for storing tabular data;
expressive data schematization with support for hierarchical types and features of data sorting;
background replication and repair of erasure data that do not require any manual actions;
transactions that can affect many objects and last indefinitely;

In general, YTsaurus is a fairly powerful computing platform that involves running arbitrary user code. Currently, YTsaurus dynamic tables store petabytes of data, and a large number of interactive services are built on top of them.

The Github-repository contains the YTsaurus server code, deployment infrastructure using k8s, as well as the system web interface and client SDK for common programming languages ​​- C ++, Java, Go and Python. All this is under the Apache 2.0 license, which allows everyone to upload it to their servers, as well as modify it to suit their needs.