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Re: [BackupPC-users] Yet another "moving backuppc" question
2012-06-22 15:58:07
Kameleon <kameleon25 AT gmail DOT com> wrote on 06/22/2012
03:41:56 PM:
> We just had to buy 2 backup drives and they were over $1000. This
is a
> Dell server, not some basic desktop drive. Otherwise I woudl have
to
> fully agree with you and say we need to just buy new drives. We also
> are in a budgetary constraint. Hence the need to move the drives
> instead of purchase new ones.
I have *NEVER* understood the logic of putting BackupPC
into your SAN. First of all, your SAN contains your production data,
so why do you want to store the backups there? Second of all, it
uses (I assume, given the cost) 15k RPM SAS drives, which are *crazy* fast
and *crazy* expensive. You can fix both of those by throwing a bunch
of 7200 RPM SATA drives into a reasonably low-end PC for less than the
price of those two SAS drives.
Backup is about bulk storage with reasonable (near-line)
performance and reliability. SAN is all about maximum performance
and maximum reliability. Their strengths do not mesh well.
Besides, it's backup. If you're using it, something
has already gone pretty far wrong. Do you really want your backup
server to be several layers away from the underlying data? I don't.
What if the thing that caused you to need the backup was an issue
in the virtualization system--the same thing that your backups are depending
on!
In the case of online data, multiple copies is not
practical. In the case of backups, multiple copies are perfectly
fine. You can achieve multiple copies by using the archive feature,
or even easier by having two BackupPC servers!
I'm sure you've got a dozen objections why you just
*can't* put BackupPC on separate, inexpensive hardware. But you've
very effectively painted yourself into an awkward corner. We don't
have a rabbit to pull out of our hat. Speaking for myself, I think
that you underlying assumptions and basic decisions have more to do with
the awkward spot you're in than does the technology.
Tim Massey
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