fastcp

# FastCP - 多目标并行复制 / Multi-target Parallel Copy 将源目录一次性读入内存，并行复制到多个目标（U盘）。专为 AI 工具自动化调用设计。 Read source directory into memory once, copy to multiple targets (USB drives) in parallel. Designed for AI tool automation. ## 使用场景 / When to use - 同一份文件同时复制到多个U盘 / Copy same files to multiple USB drives - 批量部署文件到多个目标目录 / Batch deploy to multiple destinations - 需要复制后校验完整性 / Copy with integrity verification ## 安装 / Install 从 GitHub Releases 下载或源码编译： ```bash go install github.com/dongsheng123132/fastcp@latest ``` ## 用法 / Usage ```bash # 复制到多个U盘 / Copy to multiple USB drives fastcp <source_dir> <target1> <target2> [target3] ... # Windows 示例 fastcp.exe D:\源文件夹 E:\ F:\ G:\ H:\ # Linux/macOS 示例 fastcp /path/to/source /media/usb1 /media/usb2 /media/usb3 # 带校验 / With verification (xxhash) fastcp --verify <source> <target1> <target2> # 增量复制 / Incremental (skip unchanged) fastcp --incremental <source> <target1> # 控制并发数 / Control parallelism (default 3) fastcp -c 2 <source> <target1> <target2> <target3> # 预览模式 / Preview without copying fastcp --dry-run <source> <target1> <target2> ``` ## 参数 / Flags - `-c, --concurrency N`: 同时写入目标数 / simultaneous target writes (default 3) - `-b, --buffer-size`: 写缓冲区 / write buffer (default 4M) - `--verify`: xxhash 校验 / integrity check after copy - `--incremental`: 跳过未变更文件 / skip unchanged files - `--dry-run`: 预览不复制 / preview only - `--preload-all`: 强制全量预加载 / force all files into memory ## 典型流程 / Typical workflow 1. 确认U盘挂载盘符 / Identify mounted drives 2. 执行: `fastcp --verify D:\source E:\ F:\ G:\` 3. 检查校验结果 / Check verification output