Hi all,
What I would like to do for backups is the following: Rather than plug
an external drive into my machine every day, I would like to do daily
rdiff-backups to local storage (since I have more than enough). Then,
once a week, I would like to backup that backup to an external drive.
My original thought was to use rdiff-backup for the local backup,
thereby allowing me to have incremental versions of files. And then,
backp the rdiff-backup using to an external drive using, say, rsync.
The problem I have is the following: Since I don't trust that file
timestamps will be sufficient to determine whether or not a file has
changed (since I have some large files that are updated with NO
timestamp change), I would have to use rsync in the mode that
hashes/checksums each file on the source and destination. And since the
destination is an external drive, it will be extremely time-consuming,
as it means fully reading every file across slow USB (before even
attempting any updates).
Do I understand correctly that rdiff-backup does hashes/checksums of
every file?
And do I understand correctly that it stores this information in the
meta data, such that JUST the meta data needs to be read back from an
external drive, thereby greatly increasing backup speed?
If I am correct about the above assumptions, it seems that rdiff-backup
might be a good option for both my local backup and the backup (of the
local backup) to the external drive.
However, at this point I'm unsure if an rdiff-backup of an rdiff-backup
is even possible. Is it? How will it handle the backup of the meta data?
Will the files conflict?
A related question: Is there any way to have rdiff-backup create the
meta data in a separate location from the actual files? It would seem
that might be quite a useful option. Just curious.
[I am running 1.2.8 on a Linux Mint machine.]
I'd really appreciate any help or suggestions you can offer.
Thanks,
Greg
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