big-data

ClickHouse is an open-source column-oriented database management system that allows generating analytical data reports in real-time. It provides high performance for analytical queries on large datasets.

HDFS is a distributed file system designed to store large datasets reliably and provide high-throughput access to application data. It's the storage foundation of the Apache Hadoop ecosystem.

Apache Druid is a high performance, real-time analytics database that delivers sub-second OLAP queries on streaming and batch data at scale and under load.

Apache HBase is an open-source, distributed, versioned, column-oriented database modeled after Google's Bigtable. It provides Bigtable-like capabilities on top of Apache Hadoop for handling massive datasets with billions of rows and millions of columns.

Cloud Bigtable is Google's fully managed, scalable NoSQL database service designed for large analytical and operational workloads. It powers many Google services including Search, Analytics, Maps and Gmail.