TidesDB: A High-Performance Embeddable Storage Engine in C

Summary

TidesDB is a high-performance, adaptive, and durable embeddable storage engine library written in C. It is built on a log-structured merge-tree (LSM-tree) and offers ACID transactions with MVCC, multi-column family support, and cross-platform compatibility. Designed for flash and RAM optimization, TidesDB provides a robust foundation for building scalable key-value or column stores.

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Introduction

TidesDB is a fast and efficient key-value storage engine library implemented in C. It leverages a log-structured merge-tree (LSM-tree) as its underlying data structure, providing high-performance, adaptive, durable, and transactional capabilities. While not a full-featured database, TidesDB serves as a powerful library for developers to build custom database solutions or utilize it as a standalone key-value/column store, optimized for flash and RAM.

Installation

To get started with TidesDB, including instructions for building and benchmarking, please refer to the official documentation: Building & Benchmarking TidesDB

Examples

For detailed C usage documentation and examples on how to integrate TidesDB into your projects, consult the TidesDB C Reference.

Why Use TidesDB?

TidesDB stands out with a comprehensive set of features designed for demanding storage needs:

ACID Transactions with MVCC: Supports 5 isolation levels, including Serializable Snapshot Isolation (SSI), with savepoints and read-your-own-writes semantics.
Multi-Column Family Support: Provides isolated key-value stores with independent configurations and atomic transactions across them.
Hybrid and Adaptive Compaction: Offers various compaction modes, Dynamic Capacity Adaptation (DCA), and dynamic level management for optimal performance and space.
Automatic Crash Recovery: Reconstructs memtables from write-ahead log (WAL) files on startup, ensuring data integrity.
Key-Value Separation: Implements WiscKey-style separation for small and large values, reducing write amplification.
TTL Support: Enables automatic key-value expiration, handled during reads and compaction.
Cross-Platform Compatibility: Fully supports Linux, macOS, Windows, BSD, and Solaris/Illumos across x86, ARM, RISC-V, and PowerPC architectures, with file portability.
Clean C API: Offers a straightforward C API with clear error codes and configurable debug logging.