Backup scripts

[Greg Deback (rsync)]

Hi,

I think the words used are not correct, that's why you (and Kevin) are a
bit confused. You are in fact asking for "incremental" backup, not a
"snapshot" : http://en.wikipedia.org/wiki/Snapshot_(computer_storage).
In this case, you can use rsync with a few flags to delete (or move in
another directory) the modified/deleted files regarding the last "backup".

This would look something like this ((h)uman, do not (x)cross filesystem
boundaries, (P)rogress, (H)ard-links, (a)rchive, aka
recursive+symlinks+perms+time+owner+group+specials and g(z)ip):

# Cloning your data to a distant folder with timestamp
rsync -hxPHaz --exclude=<exclude_list> <source> <target>/$NOW/
# Incremental backup only
rsync -hxPHaz --exclude=<exclude_list> --delete --backup
--backup-dir=<backup> <source> <target>/latest/
# You can even "suffix" the modified/deleted files
rsync -hxPHaz --exclude=<exclude_list> --delete --backup
--backup-dir=<backup> --suffix=~$NOW <source> <target>/latest/

Hope that will help,
Greg




On Thu, Sep 4, 2014 at 11:21 PM, Kevin Korb <kmk at sanitarium.net> wrote:

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> Yes, you have different scripts now at least.  But I still don't see
> any snapshotting.  The only difference in these is that the "full" one
> rsyncs to a date+time stamped directory while the "snapshot" one
> rsyncs to a directory named snapshot.  As far as I can tell both will
> be a complete copy with no relationship to the other.
>
> On 09/04/2014 05:17 PM, Chris wrote:
> > On Thu, 2014-09-04 at 17:00 -0400, Kevin Korb wrote:
> >> Do you actually have any snapshots currently?  From the scripts
> >> you posted it seems to just be rsyncing to the same dir every run
> >> and only claiming to be making snapshots.  If you do have
> >> snapshots now then something else is happening in addition to
> >> this script.
> >
> > It was pointed out to me in a direct message that I had
> > inadvertently posted the same scripts (full backup) in pastebin.
> > Here are the correct one.
> >
> > Full http://pastebin.com/dEk7kBip
> >
> > Snapshot http://pastebin.com/H7SuABN1
> >
> >>
> >> On 09/04/2014 04:58 PM, Chris wrote:
> >>> On Thu, 2014-09-04 at 12:46 -0400, Kevin Korb wrote:
> >>>> The scripts you posted look the same to me.  And I don't see
> >>>> any form of snapshotting.  The $NOW variable is set and is
> >>>> echoed but it is never actually used.  For an rsync snapshot
> >>>> I would expect to see either rsync --link-dest or a cp -al
> >>>> depending on the age of the script.
> >>>>
> >>>> The only reason to need two scripts would be because the
> >>>> snapshot would need 3 dirs to work with (the source, the
> >>>> target, and the previous backup) but that could also be
> >>>> handled with 1 script and a simple existing check.
> >>>>
> >>>> On 09/04/2014 12:30 PM, Chris wrote:
> >>>>> I have two scripts that a kind soul on this list wrote for
> >>>>> me over 4yrs ago. I got to looking at them the other day
> >>>>> because my old box crashed and had to build a new one also
> >>>>> got a new backup USB drive since I'm still copying over
> >>>>> things from the old one. The first one is for a full
> >>>>> backup:
> >>>>>
> >>>>> http://pastebin.com/XF6Zm42A
> >>>>>
> >>>>> Works great, does exactly what it's supposed to do. The
> >>>>> second is for a 'snapshot' which is where I get a bit
> >>>>> confused. I would think that a 'snapshot' would be just the
> >>>>> changed files either since the last full backup or since
> >>>>> the last 'snapshot' the night before. It seems though that
> >>>>> it's actually the same as a full backup. I don't profess to
> >>>>> be a script person so I have no idea if it's doing what it
> >>>>> should or something needs to be changed. Below is the 2nd
> >>>>> script:
> >>>>>
> >>>>> http://pastebin.com/MkBzJnux
> >>>>>
> >>>>> Any advice would be appreciated.
> >>>>>
> >>>>> Chris
> >>>>>
> >>>>
> >>> Thanks Kevin, I guess for now I'll leave them as they are until
> >>> I can get smart on scripting.
> >>>
> >>> Chris
> >>>
> >>
> >
> >
>
> - --
> ~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~
>         Kevin Korb                      Phone:    (407) 252-6853
>         Systems Administrator           Internet:
>         FutureQuest, Inc.               Kevin at FutureQuest.net  (work)
>         Orlando, Florida                kmk at sanitarium.net (personal)
>         Web page:                       http://www.sanitarium.net/
>         PGP public key available on web site.
> ~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~
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