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diff from compressed files

Posted by Thierry Lavallee via rsnapshot-discuss 
Thierry Lavallee via rsnapshot-discuss
diff from compressed files
June 12, 2017 09:59AM
Hi,

Currently the cpanel backups on my server creates an uncompressed backup
directory per account with all files from the account. Takes a lot of space.

There is an option to COMPRESS to a tar.gz file for each account. Which
CONSIDERABLY reduce the space.

Is there any way for rsnapshot to sync only the changes _within_
compressed files?

Thanks

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David Cantrell
Re: diff from compressed files
June 13, 2017 04:59AM
On Mon, Jun 12, 2017 at 03:35:12PM -0400, Thierry Lavallee via rsnapshot-discuss wrote:

> I was maybe thinking about the --rsyncable option in gzip
> https://beeznest.wordpress.com/2005/02/03/rsyncable-gzip/

For files that rsync copies across a network I believe that its default
behaviour is to only transfer the chunks of the file that have changed,
so if you use that option to create your compressed files it should Just
Work. rsnapshot will still, however, *store* complete copies of every
version of the file.

--
David Cantrell | semi-evolved ape-thing

Please stop rolling your Jargon Dice and explain the problem
you are having to me in plain English, using small words.
-- John Hardin, in the Monastery

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Thierry Lavallee via rsnapshot-discuss
Re: diff from compressed files
June 18, 2017 06:59PM
The new cpanel backup creates an uncompressed tar file for every account.
The legacy cpanel backup used to create an open directory of all the
files associated with an account, making the rsync in rsnapshot work as
expected.

Is there a way to use the NEW cpanel uncompressed tar, and retreive only
the diff?

Thanks
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