pigz
===

可以用来解压缩文件，gzip的并行实现升级版。

## 补充说明

**pigz命令**可以用来解压缩文件，最重要的是支持多线程并行处理，解压缩比gzip快。主页: [http://zlib.net/pigz/](http://zlib.net/pigz/)

### 语法

```bash
pigz [ -cdfhikKlLmMnNqrRtz0..9,11 ] [ -b blocksize ] [ -p threads ] [ -S suffix ] [ name ...  ]
unpigz [ -cfhikKlLmMnNqrRtz ] [ -b blocksize ] [ -p threads ] [ -S suffix ] [ name ...  ]
```

### 参数

```bash
-0 to -9, -11        Compression level (level 11, zopfli, is much slower)
--fast, --best       Compression levels 1 and 9 respectively
-b, --blocksize mmm  Set compression block size to mmmK (default 128K)
-c, --stdout         Write all processed output to stdout (won't delete)
-d, --decompress     Decompress the compressed input
-f, --force          Force overwrite, compress .gz, links, and to terminal
-F  --first          Do iterations first, before block split for -11
-h, --help           Display a help screen and quit
-i, --independent    Compress blocks independently for damage recovery
-I, --iterations n   Number of iterations for -11 optimization
-J, --maxsplits n    Maximum number of split blocks for -11
-k, --keep           Do not delete original file after processing
-K, --zip            Compress to PKWare zip (.zip) single entry format
-l, --list           List the contents of the compressed input
-L, --license        Display the pigz license and quit
-m, --no-time        Do not store or restore mod time
-M, --time           Store or restore mod time
-n, --no-name        Do not store or restore file name or mod time
-N, --name           Store or restore file name and mod time
-O  --oneblock       Do not split into smaller blocks for -11
-p, --processes n    Allow up to n compression threads (default is the number of online processors, or 8 if unknown)
-q, --quiet          Print no messages, even on error
-r, --recursive      Process the contents of all subdirectories
-R, --rsyncable      Input-determined block locations for rsync
-S, --suffix .sss    Use suffix .sss instead of .gz (for compression)
-t, --test           Test the integrity of the compressed input
-v, --verbose        Provide more verbose output
-V  --version        Show the version of pigz
-Y  --synchronous    Force output file write to permanent storage
-z, --zlib           Compress to zlib (.zz) instead of gzip format
--                   All arguments after "--" are treated as files
```

### 实例

可以结合`tar`使用, 压缩命令

```bash
tar -cvf - dir1 dir2 dir3 | pigz -p 8 > output.tgz
```

解压命令

```bash
pigz -p 8 -d output.tgz
```

如果是gzip格式，也支持用tar解压

```bash
tar -xzvf output.tgz
```
