# Building YDB from sources ## Build Requirements We have tested YDB builds using Ubuntu 18.04, 20.04 and 22.04. Other Linux distributions are likely to work, but additional effort may be needed. Only x86_64 Linux is currently supported. Below is a list of packages that need to be installed before building YDB. 'How to Build' section contains step by step instructions to obtain these packages. - cmake 3.22+ - clang-14 - lld-14 - git 2.20+ - python3.8 - pip3 - antlr3 - libaio-dev - libidn11-dev - ninja 1.10+ We run multiple clang instances in parallel to speed up the process by default. Each instance of clang may use up to 1GB of RAM, and linking the binary may use up to 16GB of RAM, please make sure your build host has enough resources. ## Runtime Requirements The following packages are required to run ydbd server: - libidn11 - libaio # How to Build ## (optional) Add CMake and LLVM APT repositories (for Ubuntu 18.04 and 20.04) ## Ubuntu 18.04 and Ubuntu 20.04 For Ubuntu 18.04 and Ubuntu 20.04, you have to add CMake and LLVM APT repositories: ```bash wget -O - https://apt.kitware.com/keys/kitware-archive-latest.asc | sudo apt-key add - echo "deb http://apt.kitware.com/ubuntu/ $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/kitware.list >/dev/null wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add - echo "deb http://apt.llvm.org/$(lsb_release -cs)/ llvm-toolchain-$(lsb_release -cs)-14 main" | sudo tee /etc/apt/sources.list.d/llvm.list >/dev/null sudo apt-get update ``` ## Install dependencies ```bash sudo apt-get -y install git cmake python3-pip ninja-build antlr3 m4 clang-14 lld-14 libidn11-dev libaio1 libaio-dev llvm-14 sudo pip3 install conan==1.59 ``` ## Create the work directory. > :warning: Please make sure you have at least 80Gb of free space. We also recommend placing this directory on SSD to reduce build times. ```bash mkdir ~/ydbwork && cd ~/ydbwork mkdir build ``` ## Clone the ydb repository. ```bash git clone https://github.com/ydb-platform/ydb.git ``` ## Configure ### Configure without Ccache Run cmake to generate build configuration: ```bash cd build cmake -G Ninja -DCMAKE_BUILD_TYPE=Release -DCMAKE_C_FLAGS_RELEASE="-O2 -UNDEBUG" -DCMAKE_CXX_FLAGS_RELEASE="-O2 -UNDEBUG" -DCMAKE_TOOLCHAIN_FILE=../ydb/clang.toolchain ../ydb ``` ### (optional) Configure with Ccache With enabled Ccache, you can finish the compilation of all targets on supported Linux distributions in a few minutes. Or just `ydbd` or `ydb` binary in a couple of seconds. To optionally enable `Ccache` and enhance the compilation speed, follow these steps: 1. Install `Ccache` into `/usr/local/bin/` (We are using version `4.8.1`, you can use any version greater than `4.7`) ```bash (V=4.8.1; curl -L https://github.com/ccache/ccache/releases/download/v${V}/ccache-${V}-linux-x86_64.tar.xz | \ sudo tar -xJ -C /usr/local/bin/ --strip-components=1 --no-same-owner ccache-${V}-linux-x86_64/ccache) ``` 2. Configure `Ccache` to use remote storage using environment variables ```bash export CCACHE_REMOTE_STORAGE="http://cachesrv.ydb.tech:8080|read-only|layout=bazel" export CCACHE_SLOPPINESS=locale export CCACHE_BASEDIR=~/ydbwork/ ``` <details> <summary>or using Ccache config file</summary> ```bash ccache -o remote_storage="http://cachesrv.ydb.tech:8080|read-only|layout=bazel" ccache -o sloppiness=locale ccache -o base_dir=~/ydbwork/ ``` </details> 3. Also, you should change Conan's home folder to the build folder for better cache hit ```bash export CONAN_USER_HOME=~/ydbwork/build ``` 4. Genreate build configuration using `ccache` ```bash cd build cmake -G Ninja -DCMAKE_BUILD_TYPE=Release \ -DCMAKE_C_COMPILER_LAUNCHER=/usr/local/bin/ccache -DCMAKE_CXX_COMPILER_LAUNCHER=/usr/local/bin/ccache \ -DCMAKE_TOOLCHAIN_FILE=../ydb/clang.toolchain \ -DCMAKE_C_FLAGS_RELEASE="-O2 -UNDEBUG" \ -DCMAKE_CXX_FLAGS_RELEASE="-O2 -UNDEBUG" \ ../ydb ``` ## Build To build all binary artifacts (server YDBD, client YDB, unittest binaries) run: ```bash ninja ``` A YDB server binary can be found at: ``` ydb/apps/ydbd/ydbd ``` ## Build and Test YDB CLI To build YDB CLI (ydb): ```bash ninja ydb/apps/ydb/all ``` A YDB CLI binary can be found at: ``` ydb/apps/ydb/ydb ``` ### Unit tests To build YDB CLI unit tests: ```bash ninja ydb/public/lib/ydb_cli/all ``` To run tests execute: ```bash cd ydb/public/lib/ydb_cli/ ctest ``` ### Functional tests Before launch tests you need to build YDB CLI and YDB server binaries. Also you can load [ydbd](https://ydb.tech/en/docs/downloads/#ydb-server) binary file and use it. To launch YDB CLI python tests run `ydb_cli` test suite via pytest according to this [instruction](ydb/tests/functional/README.md).