About RocksDB
RocksDB is an embeddable persistent key-value store built for fast storage. It is a library that software links into, rather than a separate server that applications connect to.
What it does
RocksDB stores arbitrary byte keys and values on disk, with recent data kept in memory. It is built on a log-structured engine written in C++. Developers use it as the storage layer inside their own applications, and it also serves as the storage engine for other database projects, such as MyRocks. It supports basic reads and writes, along with more advanced operations such as merge operators and compaction filters.
Key features
- Embedded library with no separate server
- Keys and values as raw byte sequences
- Tuned for flash and high-speed disks
- Merge operators and compaction filters
- C++ core with a Java API
Who it's for
Engineers building storage engines or high-performance services, and teams that need a local persistent key-value store inside an application. It is most useful when the store must be fast and must live in the same process as the code that uses it.
Pricing and good to know
RocksDB is free and open source. The GitHub repository lists a GPL-2.0 license, so check the terms with your legal team before shipping a product that links to it. The library is designed for fast storage such as SSDs, and tuning options matter a lot for each workload.
Highlights
- Embed a persistent key-value store in an application
- Store raw byte keys and values
- Run merges and compaction filters on stored data
- Use a C++ core with a Java API
- Tune storage behavior for flash and fast disks
