Re: Listing the deltas

[Colin Percival <cperciva@tarsnap.com>]

On 06/06/12 05:19, Tom Limoncelli wrote:
> On a machine where very little changes each day, there always seems to
> be 20 MB of "new data".  Is there a way to list which files changed
> and were backuped?

No.  The way the tarsnap code works internally, it generates a complete
archive and then figures out which blocks duplicate data previously
uploaded; the deduplication code doesn't have any way of knowing which
files data originally belonged to (and in fact there will be blocks
with data aggregated from multiple files).

> A typical --print-stats --humanize-numbers output looks like:
> 
>                                       Total size  Compressed size
> All archives                               408 GB           256 GB
>  (unique data)                             32 GB            20 GB
> This archive                                40 GB            25 GB
> New data                                    20 MB           4.3 MB

The best way to handle this -- or at least, the way that I approached
it when I was trying to figure out why the backups of my laptop kept
having a significant amount of new data every hour -- is to run
# find / -mtime -1h
to look for recently-modified files.  In my case, the culprit was in
~/.config/chromium/Default.

-- 
Colin Percival
Security Officer Emeritus, FreeBSD | The power to serve
Founder, Tarsnap | www.tarsnap.com | Online backups for the truly paranoid