Re: Using the --snaptime option

[Daniel Staal <DStaal@usa.net>]

--As of January 23, 2014 8:32:14 AM -0800, Colin Percival is alleged to 
have said:

> > > Point it at anything with a modification time <= when the snapshot was
> > > created.  Obviously anything inside the snapshot will have this
> > > property; as will a file you create prior to creating the snapshot.
> >
> > Colin, thanks for your explanation. But I'm definitely misunderstanding
> > something here: if I specify a file that was last modified 10 years
> > ago, how does that help you?
>
> That will effectively disable the "recognize when files haven't changed"
> functionality, which will force Tarsnap to re-read files which it might
> otherwise have not bothered to re-read.

--As for the rest, it is mine.

So, essentially for this purpose it's the same as the `--newer-than` 
option, and could be replaced with any of the --newer options, right?  And 
the only penalty for not using it is that tarsnap will have to do more 
dedup work than it would otherwise have to?

(Of course, we are talking about ZFS snapshots here, which is already have 
an atomic creation and can be browsed like any other filesystem.  I'm not 
sure if that applies to other forms of snapshots.)

Daniel T. Staal

---------------------------------------------------------------
This email copyright the author.  Unless otherwise noted, you
are expressly allowed to retransmit, quote, or otherwise use
the contents for non-commercial purposes.  This copyright will
expire 5 years after the author's death, or in 30 years,
whichever is longer, unless such a period is in excess of
local copyright law.
---------------------------------------------------------------