Re: How use rsync to make source and target identical again

Yes, I used the -p option to scp. I have actually run rsync to try to
accomplish what I'm asking for in this thread:

[root@ska824 ~]# rsync -arv --delete --ignore-existing -te 'ssh -c
arcfour' mxftp@xxxxxxxxxxxxxxxxxx:/data/stores/ /data/stores/

I'm starting to think about this "--ignore-existing" option. Can this
make me end up with older versions of files on target than on source?
It's about a month ago since I ran this command, before my vacation,
so I can't really tell why I used this option "--ignore-existing",
maybe I don't need it. (Maybe I thought this was the only way to avoid
copying identical files between source and target.)

Regards Christian

On 26 Juli, 10:28, Eef Hartman <E.J.M.Hart...@xxxxxxxxxx> wrote:
Christian <christian.m.eriks...@xxxxxxxxx> wrote:
I have earlier copied source to target with scp.

Did you use scp with the -p option to preserve date/time ??

How should I run rsync to accomplish that without copying
already identical files between source ant target? (There may be files
added on target that don't exist on source and those files I want
deleted.)

Normally rsync checks on date/time and size, if those are identical
it won't copy it again.
If the date/time is NOT identical you will have to check contents,
which will make it MUCH slower:
   -a (optional -H for "hard links", -S for "sparse files")
will make an "archive" copy, based on date/time and size, add
   -c (check on checksum, not data-time)
if the copies do NOT already have the same date/time.

Example: I want to sync directory "data" _and_ all of its contents
to remote machine backup, under directory mirror:
   rsync -a data backup:mirror
for a date/time based sync (note: NO trailing / on source "data"
means dat "data" will become a subdir of "mirror").
Add -H, -S and/or -c options as needed, -a will handle most other
attributes, but these are optional (-H when you want to preserve
HARD links in the copied files, -S when you want to keep sparse
files AS sparse files).

See also the man page for rsync
--
******************************************************************
**  Eef Hartman, Delft University of Technology, dept. SSC/ICT  **
**  e-mail: E.J.M.Hart...@xxxxxxxxxx - phone: +31-15-27 82525   **
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