RocksDBssä

RocksDB is an open-source, embeddable persistent key-value store developed by Facebook. It is a fork of Google's LevelDB and is designed to run on a variety of platforms, including Linux, macOS, Windows, and Android. RocksDB is optimized for fast storage, such as solid-state drives (SSDs), and offers high performance for read and write operations.

The architecture of RocksDB is based on a log-structured merge-tree (LSM tree) data structure. This structure allows for efficient writes by appending new data to an in-memory write buffer and then flushing it to disk in sorted order. Reads are handled by first checking the in-memory buffer, then multiple levels of sorted files on disk. This design prioritizes write performance over read performance, though optimizations exist to improve read speeds.

RocksDB provides a C++ API, with bindings available for various programming languages including Java, Python, and Go. It supports features like atomic writes, snapshots, iterators, and compaction, which are processes that merge sorted files to maintain optimal performance and disk space usage. Its embeddable nature means it can be directly integrated into applications without requiring a separate database server process.

Common use cases for RocksDB include embedded databases within applications, caching layers, message queues, and as a storage engine for distributed systems. Its performance characteristics make it suitable for scenarios demanding high throughput and low latency for write-heavy workloads. The project is actively maintained by a community of developers and is widely used in production environments.