john boris on 24 Aug 2016 09:03:36 -0700

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Re: [PLUG] epiphany or stupidity?

BackupPC does this out of the box. As long as the systems are at the same patch level and same software. I have never tested it but that is one of the features it touts.

On Wed, Aug 24, 2016 at 11:59 AM, Michael Leone <> wrote:
The concept is called deduplication; lots of backup programs support
it. My DataDomains get over 90% space savings that way.

As for SANs, that's also how our new Dell XtremIO SAN can use 20TB to
take over for our older VNX with 80TB (they tell me; we haven't
finished installing it yet, much less migrated).

On Wed, Aug 24, 2016 at 11:56 AM, Tone Montone <> wrote:
> I was running last night, and for some reason, I had an idea about backups.
> It occurred to me that if I had 100 Red Hat systems, all running the same OS
> and Patch level, would I need full backups on all the systems.  Wouldn't
> there be static information like executables that would be the same across
> all systems?  So instead of doing fulls x 100, I could do a full x 1, then
> just differentials or incrementals on the others, thereby reducing total
> storage required on tapes.
> Then I thought if I took the same idea and applied it to the SAN storage,
> could I have fixed images that the systems run on, and only require 1
> instance of it, thereby reducing total storage space requirements.
> Then I thought, either this is a really stupid idea, or it's brilliant and
> most likely already done.
> Comments?
> Thanks,
> Mike
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