[Zope] backup full instances

Jonas Meurer jonas at freesources.org
Sun Oct 28 15:18:12 EDT 2007

On 27/10/2007 Tino Wildenhain wrote:
> Nobody is wrong. Your #debian guys just had not all informations.
> Zope is always appending to Data.fs, copy (cp) works linear, so
> it would always maintain a consistent state of this file.
> (It either copies before or after the last append operation)
> rsync on the other hand is very efficient by calculating only
> differences of the file contents to be copied. This may or may
> be not following the order of blocks in the file. In the latter
> case it could try to sync wrong information. (You would need
> a special rsync which would only transfer new blocks at the end
> in their given order - you could script something like this
> using dd, gzip/zcat, ssh.

that finally made the difference between rsync and local copy
clear to me ;-)

i'll change the backups to rsync a local copy in the future.


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