Rsync备份一个源目录并再次检查多个目录 [英] Rsync backup one source directory and check agains multiple directories
问题描述
我正在尝试根据日期将"sdir"目录复制(rsync)到tdir目录.我想要一个完整的副本到mon目录,仅调整哪些已更改,仅调整哪些已更改,等等,但我没有得到所需的结果.请参阅我运行的实际命令:
I am trying to copy(rsync) the "sdir" directory to tdir directories depending on what day it is. I want one full copy to mon directory, tues only what changed, wed only what changed, etc. but I am not getting the results I need. Refer to actual command I ran:
[jesse@localhost test]$ tree
.
├── sdir
│ ├── file1
│ ├── file2
│ ├── file3
│ ├── file4
│ └── file5
└── tdir
├── fri
├── mon
│ ├── file1
│ └── file2
├── thu
├── tue
│ └── file3
└── wed
├── file3
├── file4
└── file5
7 directories, 11 files
[jesse@localhost test]$ touch sdir/file6
[jesse@localhost test]$ rsync -av --dry-run sdir/ --compare-dest=/home/jesse/test/tdir/mon/ /home/jesse/test/tdir/tue/ /home/jesse/test/tdir/wed/ /home/jesse/test/tdir//thu/ --backup-dir=/home/jesse/test/tdir/fri/
sending incremental file list
./
file3
file4
file5
file6
sent 294 bytes received 31 bytes 650.00 bytes/sec
total size is 0 speedup is 0.00 (DRY RUN)
[jesse@localhost test]$ rsync -av --dry-run sdir/ --compare-dest=/home/jesse/test/tdir/mon/ /home/jesse/test/tdir/tue/ /home/jesse/test/tdir/wed/ /home/jesse/test/tdir//thu/ --backup-dir=/home/jesse/test/tdir/thu/
sending incremental file list
./
file3
file4
file5
file6
sent 294 bytes received 31 bytes 650.00 bytes/sec
total size is 0 speedup is 0.00 (DRY RUN)
[jesse@localhost test]$ rsync -av --dry-run sdir/ --compare-dest=/home/jesse/test/tdir/mon/ /home/jesse/test/tdir/tue/ /home/jesse/test/tdir/wed/ --backup-dir=/home/jesse/test/tdir/thu/
sending incremental file list
./
file6
sent 208 bytes received 22 bytes 460.00 bytes/sec
total size is 0 speedup is 0.00 (DRY RUN)
[jesse@localhost test]$ rsync -av --dry-run sdir/ --compare-dest=/home/jesse/test/tdir/mon/ /home/jesse/test/tdir/tue/ /home/jesse/test/tdir/wed/ /home/jesse/test/tdir/thu/ --backup-dir=/home/jesse/test/tdir/thu/
sending incremental file list
./
file3
file4
file5
file6
sent 294 bytes received 31 bytes 650.00 bytes/sec
total size is 0 speedup is 0.00 (DRY RUN)
[jesse@localhost test]$ rsync -av sdir/ --compare-dest=/home/jesse/test/tdir/mon/ /home/jesse/test/tdir/tue/ /home/jesse/test/tdir/wed/ /home/jesse/test/tdir/thu/ --backup-dir=/home/jesse/test/tdir/thu/
sending incremental file list
./
file3
file4
file5
file6
sent 438 bytes received 95 bytes 1,066.00 bytes/sec
total size is 0 speedup is 0.00
[jesse@localhost test]$ tree
.
├── sdir
│ ├── file1
│ ├── file2
│ ├── file3
│ ├── file4
│ ├── file5
│ └── file6
└── tdir
├── fri
├── mon
│ ├── file1
│ └── file2
├── thu
│ ├── file3
│ ├── file4
│ ├── file5
│ └── file6
├── tue
│ └── file3
└── wed
├── file3
├── file4
└── file5
7 directories, 16 files
[jesse@localhost test]$
推荐答案
我注意到rsync手册页明确指出"从2.6.4版本开始,多个-link-dest
可能会提供目录",对于-compare-dest
也有类似的注释,但对于-backup-dir
却没有类似的注释(这很有意义).如果要将备份限制为仅包含不在许多其他目录之一中的内容",则可以使用-*-dest
选项.
I note that the rsync man page clearly states that "Beginning in version 2.6.4, multiple --link-dest
directories may be provided", and there's a similar note for --compare-dest
but not for --backup-dir
(which makes sense). If you want to restrict your backup to "only things that are not in one of a number of other directories", the --*-dest
options are the way to go.
这是我的测试和结果:
$ mkdir src mon tue wed
$ for n in {1..3}; do date > src/file$n; sleep 1; done
$ rsync -avi src/ mon/
building file list ... done
.d..t.... ./
>f+++++++ file1
>f+++++++ file2
>f+++++++ file3
sent 346 bytes received 92 bytes 876.00 bytes/sec
total size is 87 speedup is 0.20
$ for n in {4..5}; do date > src/file$n; sleep 1; done
$ rsync -avi --compare-dest=$PWD/mon/ src/ tue/
building file list ... done
.d..t.... ./
>f+++++++ file4
>f+++++++ file5
sent 295 bytes received 70 bytes 730.00 bytes/sec
total size is 145 speedup is 0.40
$ for n in {6..7}; do date > src/file$n; sleep 1; done
$ rsync -avi --compare-dest=$PWD/mon/ --compare-dest=$PWD/tue/ src/ wed/
building file list ... done
.d..t.... ./
>f+++++++ file6
>f+++++++ file7
sent 319 bytes received 70 bytes 778.00 bytes/sec
total size is 203 speedup is 0.52
$
此处的显着区别是,每个比较目录都需要使用自己的选项.表示法不是:
The notable difference here is that each of the compare directories needs its own option. The notation is not:
rsync --compare-dest one/ two/ src/ dest/
但是:
rsync --compare-dest=one/ --compare-dest=two/ src/ dest/
要将其放入每天运行的代码中,您可以尝试执行以下操作(未经测试的脚本):
To put this into code that gets run each day, you might try something like the following (untested script):
#!/usr/bin/env bash
# Store our rsync arguments in an array, for easier handling.
rsync_args=(-a)
# If we're running interactively, show us rsync verbose output.
if [ -t 0 ]; then
rsync_args+=(-vi)
fi
# Step through weekdays, adding days to our argument list, stopping at "today"
read today < <(date '+%a')
for day in Mon Tue Wed Thu Fri; do
[ "$day" = "$today" ] && break
rsync_args+=(--compare-dest=$PWD/${day,,})
done
# And finally, copy everything.
rsync "${rsync_args[@]}" src/ "${day,,}"/
请注意,bash在参数扩展中的大小写控制( $ {s,}
和 $ {s ^^}
)是bash版本4的功能.
Note that bash's case control in parameter expansion (${s,,}
and ${s^^}
) are features of bash version 4.
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