CODEWITHSUNDEEP
linuxsearchcomparediffrsync
Valeriy Solovyov
Valeriy Solovyov

Reputation: 5648

compare files in two directory and write delta

I can't find difference between two directories: what updated, and what deleted. After that I need save new files into archive and a list of deleted files.

After that I need with copy of first directory + delta go to new directory and recreate there directory 2.

All this must be fast =)

I tried rsync

time rsync -rv --dry-run --delete ./10 ./130
sent 775081 bytes  received 105052 bytes  352053.20 bytes/sec
total size is 838724381  speedup is 952.95 (DRY RUN)
real    0m1.270s
user    0m0.300s
sys     0m0.484s

But I don't see deleted files

rsync --version

rsync version 3.0.9 protocol version 30 Copyright (C) 1996-2011 by Andrew Tridgell, Wayne Davison, and others. Web site: http://rsync.samba.org/

Maybe I don't understand someting:

[email protected]:/home.local/diff# rm -rf a/
[email protected]:/home.local/diff# rm -rf b
[email protected]:/home.local/diff# mkdir a b
[email protected]:/home.local/diff# touch b/ssdf
[email protected]:/home.local/diff# touch a/c
[email protected]:/home.local/diff# rsync --dry-run -i  --delete-delay  --stats -a  a b |grep "deleting"
[email protected]:/home.local/diff# rsync --dry-run -i  --delete-delay  --stats -a  a b
cd+++++++++ a/
>f+++++++++ a/c

Number of files: 2
Number of files transferred: 1

I created in directory files which don't exists in another but they wouldn't delete?

Upvotes: 1

Views: 966

Answers (1)

Maxim Egorushkin
Maxim Egorushkin

Reputation: 136256

rsync may not necessarily be faster. What you are observing is Linux filesystem caching:

$ time find /usr/share > /dev/null
real    0m6.779s
user    0m0.082s
sys 0m0.199s

$ time find /usr/share > /dev/null
real    0m0.109s
user    0m0.043s
sys 0m0.064s

Notice how the second search is instantaneous.

Upvotes: 1

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