[ZDP] BackTalk to Document The Zope Book (2.6 Edition)/Maintaining Zope

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A comment to the paragraph below was recently added via http://zope.org/Documentation/Books/ZopeBook/2_6Edition/MaintainingZope.stx#2-48

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    This script should be run daily from cron.  It will create
    day-of-week subdirectories under '/archive/zope', and update the
    'Data.fs' file there with the current version.  'rsync' only
    transmits *differences* between files, so only a minimal amount
    of disk copying is needed.  This could be advantageous especially
    for large ZODB databases.  

      % Anonymous User - Dec. 6, 2003 1:05 pm:
       what does rsync do if the file is modified during copying? I had the impression from zope list discussions
       that it's safer to copy Data.fs first, then rsync the copy.
       A newer option that deserves mention here is using repozo.py for incremental backups.