> On Sun, 25 Apr 2004 at 11:07am, Thomas M. Andersen wrote
>
>> I'm about to setup a Amanda-server in my network. I need to go buy some
>> hardware but i'm not quite sure what it's going to be.
>>
>> I looking at a 2U Xeon SCSI rack machine with Sony AIT-2 tapestreamer
>> and
>> 150 GB harddrive. Does it have the power/size to handle my backup?
>>
>> I have a total of 12 machines (mostly linux) with a total of about 3-400
>> GB that needs to be backed up.
>>
>> The objective is that the backup has to be done within 6 hours without
>> changing tapes more than once a day.
>
> Is that 3-400GB every night, or over a dumpcycle? If the former, you'll
> need a faster tape drive. Sony claims 15MB/s for AIT2, but that's
> assuming 2.6:1 compression. So native tape speed is about 5.8MB/s, which
> gets you ~20.7GB/hr, so about 120GB in your 6 hour window. If the latter
> and your dumpcycle is long enough (even a week would be long enough), then
> your tape drive is up to the task.
>
> As for the server itself, you're probably woefully overpowered. I
> currently back up ~200GB/night to 2 AIT3 drives hooked to a single PIII500
> with 384MB of RAM and 2 *large* IDE disks for holding space. Amanda needs
> very little in the way of CPU, unless your clients are slow and thus you
> want to do server side software compression. In either case, SCSI is
> probably overkill *and* will limit how much holding space you get.
> Holding space is good.
>
> Basically, if you have any older servers lying about that you can stuff a
> large IDE drive or two in, those will work just fine as amanda servers.
> If you can buy new, a single P4 or Athlon is more than up to the task, and
> IDE drives will save you money and get you more holding space.
>
> Good luck.
Ok, thanks. I have about 300 GB of data on 12 servers that doesn't change
much. Then i have to be able to backup up to an additionally 100 GB spread
over these servers that will grow over time. I think i will go with a week
long dump cycle.
I think i will go for the following hardware then:
2U rack server (Intel Pentium 4, 2.8 GHz)
AIT-2 Drive IDE
200 GB IDE harddrive
512 MB RAM
That would still be sufficient, right?
B. regards,
Thomas
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