Show HN: A Database Written in C

1. tidesdb

   1 11 200 9.7 C

   High-performance durable, transactional embedded storage engine designed for flash and RAM optimization.

   

   Hey hackernews! I'd like to share a hobby and passion project I've been working on for almost a year now. It's an open-source storage engine (underlying component of a database(s)) similar to that of LevelDB/RocksDB but written entirely in C.

   The storage engine is called TidesDB.

   TidesDB is written entirely in C. It's designed as a fast, transactional key-value storage engine built on a log-structured merge-tree (LSM-tree) architecture.

   My journey with TidesDB began nearly 2 years ago whilst I was experimenting with various data structures and databases in Go. When I encountered the log-structured merge tree concept, I was initially overwhelmed by its complexity after reviewing other implementations.

   However, after studying the original paper, I realized I could potentially simplify the design by focusing on just a 2-level approach(memory level and a disk level). This was challenging at first, and I scrapped many ideas along the way, but over time I discovered how powerful this design could potentially be.

   The beauty of this design/architecture is its extensibility. Since the disk level contains many SSTables (Sorted String Tables), we can efficiently pair and merge them in various ways - whether in parallel for speed or incrementally to minimize resource impact.

   What began as a challenging learning process has I believed evolved into a unique engine design and library.

   You can check out TidesDB code here: https://github.com/tidesdb/tidesdb

   Website here (Architecture-design, documentation and more): https://tidesdb.com

   There are a variety of FFI libraries in the works for C++, GO, Python, Lua and more!

   Currently TidesDB is nearing its first major release, we are still in beta development.

   I'd love to get your thoughts, questions and all :)

2. CodeRabbit

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3. Udb

   2 4 7 0.0 C++

   This is the NoSql database used by CrossLine and other tools by Rochus (by rochus-keller)

   

   Ok, I see. I implemented an object database based on the Sqlite backend some time ago for CrossLine and other applications, which includes ideas of MUMPS and also uses unicode collating algorithms implemented in Qt, but it's c++, see e.g. https://github.com/rochus-keller/Udb/blob/master/Idx.cpp.

4. EiGen

   3 3 7 8.7 C

   C++11 cross-platform migration of the Eigen Compiler Suite backend, and C frontends and libc/m for Eigen

   

   I don't want to burden you with work, so don't feel obliged in any way. This is simply my opinion (there are also good reasons for newer C versions). In all my projects, I don't have any newer versions than C99 or C++11 (most are even C++98/03). I recently even migrated a compiler backend framework from C++17 to C++11 to use it: https://github.com/rochus-keller/eigen/. I could do the same with your code if I would use it, but first I have to move forward in other projects.

   Concerning cmake: I only use it if unavoidable; instead I implemented my own build system (https://github.com/rochus-keller/busy/) some years ago which I now use for most of my projects.

5. BUSY

   4 26 86 3.7 C

   BUSY is a lean, statically typed, cross-platform, easily bootstrappable build system for GCC, CLANG and MSVC inspired by Google GN

   

   I don't want to burden you with work, so don't feel obliged in any way. This is simply my opinion (there are also good reasons for newer C versions). In all my projects, I don't have any newer versions than C99 or C++11 (most are even C++98/03). I recently even migrated a compiler backend framework from C++17 to C++11 to use it: https://github.com/rochus-keller/eigen/. I could do the same with your code if I would use it, but first I have to move forward in other projects.

   Concerning cmake: I only use it if unavoidable; instead I implemented my own build system (https://github.com/rochus-keller/busy/) some years ago which I now use for most of my projects.

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