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@ -483,15 +483,27 @@ Command Examples
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snapshot in work:backups/Latest/ . This command uses a small SQLite database
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known as the "backupdb", stored in ``~/.tahoe/private/backupdb.sqlite``, to
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remember which local files have been backed up already, and will avoid
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uploading files that have already been backed up. It compares timestamps and
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filesizes when making this comparison. It also re-uses existing directories
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which have identical contents. This lets it run faster and reduces the
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number of directories created.
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uploading files that have already been backed up (except occasionally that
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will randomly upload them again if it has been awhile since had last been
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uploaded, just to make sure that the copy of it on the server is still good).
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It compares timestamps and filesizes when making this comparison. It also
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re-uses existing directories which have identical contents. This lets it
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run faster and reduces the number of directories created.
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If you reconfigure your client node to switch to a different grid, you
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should delete the stale backupdb.sqlite file, to force "``tahoe backup``"
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to upload all files to the new grid.
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The fact that "tahoe backup" checks timestamps on your local files and
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skips ones that don't appear to have been changed is one of the major
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differences between "tahoe backup" and "tahoe cp -r". The other major
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difference is that "tahoe backup" keeps links to all of the versions that
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have been uploaded to the grid, so you can navigate among old versions
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stored in the grid. In contrast, "tahoe cp -r" unlinks the previous
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version from the grid directory and links the new version into place,
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so unless you have a link to the older version stored somewhere else,
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you'll never be able to get back to it.
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``tahoe backup --exclude=*~ ~ work:backups``
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Same as above, but this time the backup process will ignore any
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