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[NMLUG] backup storage trade
On Tue, 2004-12-07 at 22:30, Dan Parrish wrote:
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> Aaron NMLUG-EV wrote:
> | On Sat, 2004-12-04 at 08:42, Jody Harris wrote:
> |
> |>Dan Parrish wrote:
> |>
> |>>As for the privacy issue, that's a sticky one. I'm not sure if you can
> |>>encrypt a folder, but I know you can encrypt a partition. Perhaps if
> |>>you had a separate partition that was all encrypted, it'd be a bit more
> |>>secure for the client who's uploading their junk for backup purposes.
> |
> |
> | I have considered that. You can also do a partition-on-a-file,
> | and mount via loopback. The problem is that ANY change
> | to the partition, and the WHOLE partition-on-a-file file gets backed up.
It was suggested that rsync was smart enough to only update
PARTS of files that changed. Like that it does a CRC on
64K chunks, and only updates changed chunks.
If so, the encrypted FS on a file might work.
Add or change a file on this file system, and only
a few chunks change. If rsync is smart enough to only
push these changed chunks to the backup server, it would
not be a bandwidth problem.
Hopefully I can start working on this over the weekend...
aaron
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