nireo / karu

A database written in C++.

karu: linux database written in c++

Design

The design of the database is quite similar to the design of bitcask. This means that the database sacrifices memory for performance. Karu stores the keys in memory while storing values in tables which are on the disk.

Usage

#include "karu.h"
#include <iostream>

int main() {
    karu::DB db("./database_folder");
    if (auto status = db.Insert("hello", "world"); !status.ok()) {
        std::cerr << "error inserting value to map: " << status.message() << '\n';
        return 1;
    }

    auto status = db.Get("hello");
    if (!status.ok()) {
        std::cerr << "error getting value from map: " << status.message() << '\n';
        return 1;
    }

    std::cout << "Got value: " << *status << '\n';
    return 0;
}

Unit Tests

chmod +x run_tests.sh
cmake -S . -B build/
./run_tests.sh