automatic hard linking

[Drew Van Zandt]

I believe JRV has a script which does roughly what you're asking about,
though I think it's a grandfathered setup in groups of three rather than a
month... IOW if run hourly it would  keep the past three hours, then 3/6/9
hours ago, then 27/54/81 hours ago, etc. - I think he's on-list, in which
case this should jog his memory to explain that it isn't what I remember it
as, or offer it up, or similar.

--DTVZ

On Wed, Jul 23, 2008 at 1:48 PM, <t.littlefield at comcast.net> wrote:

> Hello,
>
> A co-worker and I were talking about various ways to do 'backups' to try
> and
> prevent data loss.  The topic came around to a file system we had used
> at a previous job.  I can't remember the specifics, but we believe it was
> a Network Appliance system.
>
> One of the cool features it offered was a series of hourly, nightly and
> a monthly backup of files.  We kind of surmised that it was some sort of
> hard linking of the same file name in a different directory...  i.e.
>
> ~/foo.txt
>
> hourly.0/~/foo.txt
>
> So, if you accidentally deleted your home directory copy, you could still
> recover
> it for a short time.  Once it made it past X hours, the file would start
> getting
> removed from the hourly.n directories.  We were never admins on the box
> nor do we have experience with it, so the hard link is just a theory...
>
> A quick google search on automatic hard linking didn't turn anything up.
>  Is
> there a package anyone knows of that registers for file system events and
> will create temporary hard links in another location for 'accident
> prevention'.
>
> This isn't a backup strategy (obviously) just a method for easily
> recovering
> files when that "Oops" happens...
>
> Thanks for the help.
>
> - Todd
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>
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