On Wed, 9 Aug 2017, Hannes Elvemyr wrote:
Hi!
I'm using BackupPC for all my machines and it's great! I would now like to
protect my BackupPC pool somehow (if my BackupPC server crashes, gets stolen
or burns up I don't want to loose the data). As I see it, I have at least
two options:
1. Run a second instance of BackupPC off-site
I'll advocate for this option, especially if you're mainly doing this for
disaster recovery. My reasoning is that it's the most fool-proof, least
likely to propagate corruption that might happen on the primary server, and
it's flexible.
It gives you options -- the biggest being that the off-site server doesn't
have to have the exact same configuration as the primary server.
For example, you might have the following on your primary/on-site server:
$Conf{FullPeriod} = 59.6
$Conf{IncrPeriod} = 0.6
and the following on the DR/off-site server:
$Conf{FullPeriod} = 364.6
$Conf{IncrPeriod} = 6.6
The off-site server could still wake up nightly, but as long as you stagger
the backups correctly, only ~1/7 of your machines would be backed up any
given night, and only 1/365 of your machines would get a full backup each
night.
For example if you had 365 PCs to backup, your primary server would
(assuming evenly distributed full backups) perform an average of 6 full
backups and 359 incr backups each night. Your off-site server would (again,
assuming evently distributed full backups) usually perform 1 full backup
and 52 incr backups each night.
The off-site server consumes substancially less data per night, which is
especially attractive if your link to off-site is lower bandwidth or the DR
server is otherwise challenged (less CPU, storage).
Remember your primary server would still backup everything nightly and
would be your go-to for most recoveries. But it does assume that for DR
purposes (if all your PCs and your primary BackupPC server are
fried|stolen|flooded|hacked|...) you're willing to lose up to 1 week of
data.
If the off-site server *is* adequately sized wrt storage, you also get a
much longer archival history on that server for free as a result, albeit
with less granularity.
<snip for brevity>
2. Copying the pool and send it off-site
<snip for brevity>
Any thought on this? How do you get redundancy of your BackupPC data?
Thanks!
--
/Hannes Elvemyr
Sincerely,
Stephen
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