RocksDB vs DorisDB: Open-Source Databases for Different Needs

RocksDB and DorisDB are both open-source distributed database management systems, but they have different use cases and features.

RocksDB:
- Developed by Facebook, RocksDB is an embeddable persistent key-value store for fast storage systems.
- It is designed to provide high performance for read-intensive workloads.
- RocksDB is used as a storage engine in many popular systems like Apache HBase, Apache Flink, and CockroachDB.
- It is optimized for solid-state drives (SSDs) and provides features like compression, compaction, and write-ahead logging.
DorisDB (formerly known as Palo):
- DorisDB is an open-source MPP (massively parallel processing) database designed for analytical workloads.
- Developed by Baidu, it provides low-latency SQL queries and high-concurrency data processing.
- DorisDB supports real-time data ingestion, multi-dimensional data modeling, and high availability.
- It is commonly used for data warehousing, business intelligence, and OLAP (online analytical processing) applications.

In summary, RocksDB is a key-value store optimized for fast storage systems, while DorisDB is a distributed MPP database designed for analytical workloads.