Cassandra is very good example of implementation Database

Sharding Pattern and using Horizontal Scaling features.

▪ Cassandra is a distributed database from Apache Foundation.

▪ It is highly scalable and designed to manage very large amounts of structured data.

▪ It provides high availability with no single point of failure.

▪ Apache Cassandra is a highly scalable, high-performance distributed database designed to handle large amounts of data across many different located servers.

▪ Apache Cassandra feautures;

▪ Elastic scalability - It is scalable, fault-tolerant, and consistent.

▪ No single point of failure.

▪ Column-oriented database.

▪ Flexible data storage.

▪ Easy data distribution.

https://medium.com/analytics-vidhya/nosql-apache-casandra-architecture-dcf3a309999a