rsync - Nov 2011 - Delete file on destination only if source was delete at least X days before.

Hello everybody,

I've been looking for a way to use rsync with the --del option but checking
the data of
the file as well.

What I'm after is a way to backup NAS1 to NAS2, literally copying
everything, but asking
rsync not to delete data on NAS2 not present on NAS1 if the source was removed
less than
e.g. 60 days ago.

Perhaps a cross checking between the file/dir date and the system date or
something?

The reason for this it's pretty obvious, how many time did we delete files
by mistake?
So a X days buffer would work well in my case.

At the moment I have cron 2 jobs, one copying (running every day) and the other 
copying+delete (on the 1st of the month only), it somehow does the job but
there's a risk
to delete something on the 31st and not have a backup available any more the
very next
day.

Thanks!

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Rsync has absolutely no knowledge of when a file was deleted.

Perhaps you are looking for something like --backup and --backup-dir
to temporarily preserve files instead of deleting them (then deleting
them with a simple rm -rf later)?

Or maybe you should consider an rsync --link-dest based backup system
instead of a simple mirroring that will allow you to keep many
complete old backups with minimal increase in disk space usage.

On 11/27/11 11:47, Ercolino de spiacico wrote:
> Hello everybody,
> 
> I've been looking for a way to use rsync with the --del option but
> checking the data of the file as well.
> 
> What I'm after is a way to backup NAS1 to NAS2, literally copying
> everything, but asking rsync not to delete data on NAS2 not present
> on NAS1 if the source was removed less than e.g. 60 days ago.
> 
> Perhaps a cross checking between the file/dir date and the system
> date or something?
> 
> The reason for this it's pretty obvious, how many time did we
> delete files by mistake? So a X days buffer would work well in my
> case.
> 
> At the moment I have cron 2 jobs, one copying (running every day)
> and the other copying+delete (on the 1st of the month only), it
> somehow does the job but there's a risk to delete something on the
> 31st and not have a backup available any more the very next day.
> 
> Thanks!
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	Kevin Korb			Phone:    (407) 252-6853
	Systems Administrator		Internet:
	FutureQuest, Inc.		Kevin at FutureQuest.net  (work)
	Orlando, Florida		kmk at sanitarium.net (personal)
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	PGP public key available on web site.
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