On May 12, 2013, at 10:26 AM, Michael Tiernan <[email protected]> wrote:
> On Sun, May 12, 2013 at 10:34 AM, Skylar Thompson
> <[email protected]> wrote:
>> How do you define reliability?
>
> I think that that's a darned good question. Skylar's pair of points
> misses a key definition. As a guy from Keane that I used to work with
> said, no one cares about backups, they only care about restores.
Speaking of which... at $OLDJOB, I set up rdiff-backup (with a Perl frontend i
wrote) in an environment where regular backups weren't previously being done. A
programmer was skeptical of my claims about its capabilities; as a test, he
made random changes to a bunch of test files over the course of a week,
challenging me to restore all versions. I won, which is what convinced him to
trust it.
I realize it's not *perfect* (as in, a mathematical proof-style demonstration
of success, with checksums and all), but that rdiff-backup system worked great
for me both in those tests and in later restores when live data ended up
missing or corrupt. As far as I know, that group is still using it, along with
two other groups whose systems I later managed at the same employer.
--
Brad Beyenhof . . . . . . . . . . . . . . . . http://augmentedfourth.com
No, no, you're not thinking; you're just being logical.
~ Niels Bohr
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