[ZODB-Dev] Repozo tests -- not

Christian Theune ct at gocept.com
Tue Dec 8 20:57:06 EST 2009

On 12/09/2009 02:25 AM, Shane Hathaway wrote:
> Christian Theune wrote:
>> Not exactly: it's still a good idea to store away deltas as single large
>> files are still hard to deal with except if you have really good
>> block-level de-duplication in your filesystem. (Uhmm. I guess ZFS
>> probably has all of that. It also probably serves my dinner.)
> I would run rdiff-backup on the snapshot.  Quoting the rdiff-backup
> feature list:
> "Space efficient: Suppose you have a large database file that changes a
> little bit every day. A normal incremental backup would keep saving copy
> after copy of this database, wasting a lot of space. rdiff-backup uses
> librsync, which implements the same efficient diffing algorithm that
> rsync uses. It works on binary files as well as text, so only a fraction
> of the data in your database would be saved in each incremental backup."
> http://rdiff-backup.nongnu.org/

Interesting. AFAIK this is already in place in our backup scheme. As I 
haven't put it there I wasn't conciously aware of that detail though. :)

Christian Theune · ct at gocept.com
gocept gmbh & co. kg · forsterstraße 29 · 06112 halle (saale) · germany
http://gocept.com · tel +49 345 1229889 0 · fax +49 345 1229889 1
Zope and Plone consulting and development

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