测试环境
1．1服务器硬件信息
1．2 服务器软件信息
1．3 Rsync所能够支持的功能
（1）支持断点续传
（2）支持使用ssh传输加密
（3）支持128位MD4校验（3.0以后版本使用MD5加密）
（4）支持镜像
（5）支持限速
（6）支持目录层级递归拷贝
1．4常用Rsync参数详解
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-a, --archive
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It is a quick way of saying you want recursion and want to preserve almost everything.
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-r, --recursive
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This tells rsync to copy directories recursively.
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-t, --times
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This tells rsync to transfer modification times along with the files and update them on the remote system
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-u, --update
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This forces rsync to skip any files for which the destination file already exists and has a date later than the source file
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-z, --compress
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With this option, rsync compresses any data from the files that it sends to the destination machine
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-P
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断点续传 详细显示传输过程（传输进度）
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-c, --checksum
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This forces the sender to checksum all files using a 128-bit MD4 checksum before transfer
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-n, --dry-run
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This tells rsync to not do any file transfers, instead it will just report the actions it would have taken.
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--delete
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This tells rsync to delete any files on the receiving side that aren''t on the sending side
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--bwlimit=KBPS
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This option allows you to specify a maximum transfer rate in kilobytes per second
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--protocol
(隐藏参数)
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选择传输时使用的TCP/IP协议字段号
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-B
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--block-size=SIZE checksum blocking size (default 700)
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1．5服务器逻辑
两台服务器相邻,在同一个机房
1．6 rsync server模式配置
1、目标主机(DST)设置:
（1）添加rsyncd.conf配置文件
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cat>/etc/rsyncd.conf<<EOF
uid=root
gid=root
secrets file = /etc/rsyncd.secrets
max connections=36000
use chroot=no
log file=/var/log/rsyncd.log
pid file=/var/run/rsyncd.pid
lock file=/var/run/rsyncd.lock
[rsyncDST]
path=/home/work/rsyncDST/share/1/0/
comment = rsync test
ignore errors = no
read only = no
hosts allow =10.0.101.241
hosts deny = *
EOF
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