[CentOS] Rsync and differential Backups

Mon Nov 9 18:21:30 UTC 2015
David Both <dboth at millennium-technology.com>

I beg to differ.

The rsync command is a fantastic backup system. It may not meet your 
needs, but it works really great to make different types of backups for 
me. I have a script I use (automate everything) to perform nightly 
backups with rsync. Using rsync with USB external hard drives works far 
better than any other backup system I have ever tried.

As for your other statements, they may be meaningful to you and that is 
OK, but to me are just so much irrelevant semantics. If one's backup 
system works, terminology and which commands used to achieve it are 
beside the point - it is a true backup system.

On 11/09/2015 12:59 PM, John R Pierce wrote:
> On 11/9/2015 9:50 AM, Gordon Messmer wrote:
>> I don't see the distinction you're making.
> a incremental backup copies everything since the last incremental
> a differential copies everything since the last full.
> rsync is NOT a backup system, its just a incremental file copy
> with the full/incremental/differential approach, a restore to a given 
> date would need to restore the last full, then the last differential, 
> then any incrementals since that differential, for instance, if you do 
> monthly full, weekly differential and daily incrementals.    If you 
> don't use differentials, then you'd have to restore every incremental 
> since that last full, which in a monthly full, daily incremental 
> scenario could be as many as 30 incrementals.
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