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[NMLUG] backup storage trade
Aaron NMLUG-EV wrote:
>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.
>
>
>
That's sort of the point of rsync, actually.... no reason to duplicate
just another version of rcp, otherwise.
The tech_report that comes with the rsync software is very useful in
explaining all the ins and outs of the algorithm rsync uses.
http://samba.anu.edu.au/rsync/tech_report/
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