> 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
