RocksDB安装与配置 #

# 安装依赖
sudo apt-get update
sudo apt-get install -y \
    build-essential \
    cmake \
    libgflags-dev \
    libsnappy-dev \
    zlib1g-dev \
    libbz2-dev \
    liblz4-dev \
    libzstd-dev

# 克隆源码
git clone https://github.com/facebook/rocksdb.git
cd rocksdb

# 编译
mkdir build && cd build
cmake ..
make -j$(nproc)

# 安装（可选）
sudo make install

# 安装依赖
sudo yum groupinstall -y "Development Tools"
sudo yum install -y \
    cmake \
    gflags-devel \
    snappy-devel \
    zlib-devel \
    bzip2-devel \
    lz4-devel \
    libzstd-devel

# 克隆源码
git clone https://github.com/facebook/rocksdb.git
cd rocksdb

# 编译
mkdir build && cd build
cmake ..
make -j$(nproc)

# 安装（可选）
sudo make install

# 基础编译
cmake ..

# 指定安装路径
cmake -DCMAKE_INSTALL_PREFIX=/usr/local ..

# 启用/禁用压缩库
cmake -DWITH_SNAPPY=ON \
      -DWITH_ZLIB=ON \
      -DWITH_LZ4=ON \
      -DWITH_ZSTD=ON \
      -DWITH_BZ2=OFF ..

# 编译静态库
cmake -DBUILD_SHARED_LIBS=OFF ..

# 编译调试版本
cmake -DCMAKE_BUILD_TYPE=Debug ..

# 编译发布版本
cmake -DCMAKE_BUILD_TYPE=Release ..

# 安装依赖
brew install cmake gflags snappy lz4 zstd

# 克隆源码
git clone https://github.com/facebook/rocksdb.git
cd rocksdb

# 编译
mkdir build && cd build
cmake ..
make -j$(sysctl -n hw.ncpu)

# 安装（可选）
sudo make install

# 使用Homebrew安装
brew install rocksdb

# 验证安装
brew info rocksdb

# 解决编译警告
export CXXFLAGS="-Wno-error=deprecated-declarations"

# 针对Apple Silicon优化
cmake -DCMAKE_OSX_ARCHITECTURES=arm64 ..

# 安装vcpkg
git clone https://github.com/Microsoft/vcpkg.git
cd vcpkg
.\bootstrap-vcpkg.bat

# 安装RocksDB
.\vcpkg install rocksdb:x64-windows

# 集成到Visual Studio
.\vcpkg integrate install

# 安装依赖
# 1. 安装Visual Studio 2019或更高版本
# 2. 安装CMake
# 3. 下载依赖库（snappy, zlib, lz4, zstd）

# 克隆源码
git clone https://github.com/facebook/rocksdb.git
cd rocksdb

# 创建构建目录
mkdir build
cd build

# 生成VS项目
cmake -G "Visual Studio 16 2019" -A x64 ..

# 编译
cmake --build . --config Release

// 项目属性配置
// 1. 包含目录
C:\vcpkg\installed\x64-windows\include

// 2. 库目录
C:\vcpkg\installed\x64-windows\lib

// 3. 链接库
rocksdb.lib
snappy.lib
zlib.lib
lz4.lib
zstd.lib

# 拉取镜像
docker pull rocksdb/rocksdb:latest

# 运行容器
docker run -it rocksdb/rocksdb:latest bash

FROM ubuntu:22.04

RUN apt-get update && apt-get install -y \
    build-essential \
    cmake \
    libgflags-dev \
    libsnappy-dev \
    zlib1g-dev \
    libbz2-dev \
    liblz4-dev \
    libzstd-dev \
    git

WORKDIR /app
RUN git clone https://github.com/facebook/rocksdb.git
RUN cd rocksdb && mkdir build && cd build && \
    cmake .. && make -j$(nproc)

WORKDIR /app/rocksdb

# 检查静态库
ls -la build/librocksdb.a

# 检查动态库
ls -la build/librocksdb.so*

# 检查头文件
ls -la include/rocksdb/

// test_rocksdb.cpp
#include <rocksdb/db.h>
#include <iostream>

int main() {
    rocksdb::DB* db;
    rocksdb::Options options;
    options.create_if_missing = true;
    
    rocksdb::Status status = rocksdb::DB::Open(options, "/tmp/testdb", &db);
    if (!status.ok()) {
        std::cerr << "Error: " << status.ToString() << std::endl;
        return 1;
    }
    
    std::cout << "RocksDB initialized successfully!" << std::endl;
    
    delete db;
    return 0;
}

# 编译
g++ -std=c++17 test_rocksdb.cpp \
    -I./include \
    -L./build \
    -lrocksdb \
    -lpthread \
    -ldl \
    -o test_rocksdb

# 运行
./test_rocksdb

# 进入构建目录
cd build

# 运行db_bench
./db_bench --benchmarks=fillseq,readseq,readrandom \
           --num=1000000 \
           --value_size=1024

# 常用测试命令
./db_bench --benchmarks=fillseq       # 顺序写入
./db_bench --benchmarks=fillrandom    # 随机写入
./db_bench --benchmarks=readseq       # 顺序读取
./db_bench --benchmarks=readrandom    # 随机读取
./db_bench --benchmarks=seekrandom    # 随机查找

#include <rocksdb/options.h>

rocksdb::Options options;

// 数据库不存在时自动创建
options.create_if_missing = true;

// 数据库已存在时报错
options.error_if_exists = false;

// 创建列族时如果不存在则创建
options.create_missing_column_families = true;

// 并行度设置
options.max_background_jobs = 4;
options.max_background_compactions = 4;
options.max_background_flushes = 2;

// 日志级别
options.info_log_level = rocksdb::InfoLogLevel::INFO_LEVEL;

rocksdb::WriteOptions write_options;

// 同步写入（保证持久性）
write_options.sync = false;

// 禁用WAL
write_options.disableWAL = false;

// 写入超时（微秒）
write_options.timeout_hint_us = 0;

// 低优先级写入
write_options.low_pri = false;

rocksdb::ReadOptions read_options;

// 是否验证校验和
read_options.verify_checksums = true;

// 是否填充块缓存
read_options.fill_cache = true;

// 快照读取
read_options.snapshot = nullptr;

// 读取超时（微秒）
read_options.timeout_us = 0;

// 异步IO
read_options.async_io = false;

rocksdb::FlushOptions flush_options;

// 等待刷新完成
flush_options.wait = true;

// 允许写入暂停
flush_options.allow_write_stall = false;

# 设置库路径
export LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH

# 设置包含路径
export CPLUS_INCLUDE_PATH=/usr/local/include:$CPLUS_INCLUDE_PATH

# 设置数据目录
export ROCKSDB_DATA_DIR=/data/rocksdb

# 设置日志目录
export ROCKSDB_LOG_DIR=/var/log/rocksdb

# 设置编译器
export CC=gcc
export CXX=g++

# 设置编译选项
export CFLAGS="-O3 -march=native"
export CXXFLAGS="-O3 -march=native"

# 设置链接选项
export LDFLAGS="-L/usr/local/lib"

# 解决方案
sudo apt-get install libgflags-dev
# 或者
cmake -DWITH_GFLAGS=OFF ..

# 解决方案
sudo apt-get install libsnappy-dev
# 或者
cmake -DWITH_SNAPPY=OFF ..

# 错误信息
error while loading shared libraries: librocksdb.so

# 解决方案
export LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH
# 或者
sudo ldconfig

# 错误信息
IO error: Permission denied

# 解决方案
chmod 755 /data/rocksdb
# 或者使用当前用户目录

// 解决方案：调整配置
options.write_buffer_size = 64 * 1024 * 1024;  // 64MB
options.max_write_buffer_number = 4;
options.min_write_buffer_number_to_merge = 2;

// 解决方案：限制缓存大小
options.block_cache = rocksdb::NewLRUCache(
    512 * 1024 * 1024  // 512MB
);