Can you name popular columnar storage systems?

Popular columnar storage systems are widely used for analytics and processing large volumes of data. Among them, we can highlight:

• Apache Cassandra — a distributed columnar database well-suited for high loads and scalability.
• Apache HBase — a columnar database based on Hadoop, often used for storing large amounts of unstructured data.
• ClickHouse — a high-performance analytical columnar DBMS optimized for OLAP queries.
• Google Bigtable — a distributed columnar database on which many Google services are built.
• Amazon Redshift — a column-oriented data warehouse in the cloud designed for analytics.

These systems are optimized for fast reading and aggregation of data by columns, which accelerates analytical queries compared to traditional row-based DBMS.