Скачать или смотреть "YDB is an open-source Distributed SQL Database" by Oleg Bondar & Andrey Fomichev

Language: English
YDB is a distributed horizontally-scalable fault-tolerant database
built from scratch. Its key characteristics include:
strict consistency with a possibility to relax guarantees for better performance;
horizontal scalability;
geo-replication for availability;
support for high-performance multi-row and multi-table ACID OLTP transactions;
support for declarative query language YQL (a dialect of SQL).
YDB is used as a mission-critical database for many Internet-scale services.
YDB has been designed as a platform for various data storage and processing
systems and aimed at solving a wide range of problems.

YDB is currently used as a core
component of:
a system for continuous stream processing;
persistent queues;
a high-performance network block store.

I would like to tell about YDB design and internals.