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Re: [BackupPC-users] Yet another "moving backuppc" question
2012-06-22 16:30:01
On Fri, Jun 22, 2012 at 2:55 PM, Timothy J Massey <tmassey AT obscorp DOT com> wrote:
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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I see where you are getting at. However I am merely only trying to
get the data onto the SAN as an intermediary step. Once I get all the
data off the physical host I can then pull the drives and put them in
the other physical host where backuppc will be staying. Then comes the
job of moving all the data once more, this time from the SAN to the
physical host. So yes, the backup server will be down for a bit but
hopefully this will be the last time we have to do anything like this,
at least for a while. The drives are near-line sas/sata 7200rpm 6GB/sec
2TB drives straight from Dell. As for putting it on different hardware
that costs less than 2 drives, I would love to. My hands are tied though
as our supervisor insists on only using "server grade" hardware. I too
have had this discussion, and others very similar, with her multiple
times. However she is the one that has to make the final decision and
she is the one that gets the PO's approved or not. I have even shown her
how I was able to build a storage server at home for around a grand
(intel core2duo, 6GB ram, 9x 1TB drives). I then promptly got the
"that's not on the EPL" talk. We are a government agency and can only
purchase what they tell us we can. Yet another great example of the
inefficiency of government. I do what I can when I can but this is not one of those times.
This agency has had alot of decisions made along the way that I don't
agree with and I am trying to fix them as best I can. Case in point is
exactly what is causing us to need to move the data in the first place.
Why have your backup server on the same physical host of the servers you
are backing up? Craziness I tell you! So that is why I am trying to get
the data off and back on to a physical server that we can relocate on
the opposite side of the campus. I am not objecting to any pointers or
suggestions that anyone has given on my own accord, I am "painted into
an awkward corner" by default of just having this job position. I do not
want to start an argument or have anyone think I am trying to justify
"my way" of doing it. I was just trying to see if anyone had any other
ideas on moving the data within the confines of what has been dealt me.
Thank you for your time and input.
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