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让远程传输大文件变得更快

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Jun 07, 2016 pm 05:37 PM

scpfaster

我是在两台虚拟机做的测试。如果用传统SCP远程拷贝，速度是比较慢的，如图：现在采用lz4压缩传输。LZ4是一个非常快的无损压缩算法，压缩速度在单核300MB/S，可扩

我是在两台虚拟机做的测试。

如果用传统SCP远程拷贝，，速度是比较慢的，如图：

现在采用lz4压缩传输。LZ4是一个非常快的无损压缩算法，压缩速度在单核300MB/S，可扩展支持多核CPU。它还具有一个非常快速的解码器，速度单核可达到和超越1GB/S。通常能够达到多核系统上的RAM速度限制。

项目主页：

安装（在本地和远程均安装lz4压缩工具）

# wget https://dl.dropboxusercontent.com/u/59565338/LZ4/lz4-r108.tar.gz

# cd lz4-r108/

# make;make install

远程传输

time tar -c aa.img |pv|lz4 -B4|ssh 192.168.17.129 "lz4 -d |tar -xC /root/"

传输2G的文件，速度是119M/S，花费了17秒传输完毕。

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