Partitioning for amanda
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 We are just about to start on the upgrade of our Linux file server. When we are done, it will have: - -Approx 100GB SCSI RAID (approx 40% capacity utilised) - -Approx 45GB IDE RAID (approx 60% utilised) - -Approx 45GB IDE dumping disk - -6*20GB(40GB with hardware compression claimed) HP autoloader - -Additional servers totalling approx 100GB, no disk greater than approx 30GB - -Workstations, none with more than 5GB of data to back up. I would like to know what limitations this setup will place on our partitioning of the 100GB SCSI RAID. We are planning on using XFS over LVM (if possible), but I would like to try and get the partitioning correct the first time (since I now have spare unpartitioned space to juggle data on). Apparently Amanda can not span tapes, and it seems the first dump needs to be of the full filesystem. Does this mean, in my case, that no partition should contain more than 30GB (all I can reliably get onto a tape using hardware compression) of data? Regards, Buchan - -- |Registered Linux User #182071-| Buchan MilneMechanical Engineer, Network Manager Cellphone * Work+27 82 472 2231 * +27 21 8828820x202 Stellenbosch Automotive Engineering http://www.cae.co.za GPG Key http://ranger.dnsalias.com/bgmilne.asc 1024D/60D204A7 2919 E232 5610 A038 87B1 72D6 AC92 BA50 60D2 04A7 -BEGIN PGP SIGNATURE- Version: GnuPG v1.0.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQE8yBJGrJK6UGDSBKcRAsl8AJ9QRm9rxPLFhuA8WGI8tUI2zCuJpQCePr25 fgiGmV0QqJ65C1tPC+s2ls0= =RUXP -END PGP SIGNATURE-
Re: Partitioning for amanda
Buchan Milne wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 We are just about to start on the upgrade of our Linux file server. When we are done, it will have: - -Approx 100GB SCSI RAID (approx 40% capacity utilised) - -Approx 45GB IDE RAID (approx 60% utilised) - -Approx 45GB IDE dumping disk - -6*20GB(40GB with hardware compression claimed) HP autoloader - -Additional servers totalling approx 100GB, no disk greater than approx 30GB - -Workstations, none with more than 5GB of data to back up. I would like to know what limitations this setup will place on our partitioning of the 100GB SCSI RAID. We are planning on using XFS over LVM (if possible), but I would like to try and get the partitioning correct the first time (since I now have spare unpartitioned space to juggle data on). Apparently Amanda can not span tapes, and it seems the first dump needs to be of the full filesystem. Does this mean, in my case, that no partition should contain more than 30GB (all I can reliably get onto a tape using hardware compression) of data? If you intend to use xfsdump to dump the partitions, then yes. If you intend to use tar, then you can partition any way you like. Regards, Buchan - -- |Registered Linux User #182071-| Buchan MilneMechanical Engineer, Network Manager Cellphone * Work+27 82 472 2231 * +27 21 8828820x202 Stellenbosch Automotive Engineering http://www.cae.co.za GPG Key http://ranger.dnsalias.com/bgmilne.asc 1024D/60D204A7 2919 E232 5610 A038 87B1 72D6 AC92 BA50 60D2 04A7 -BEGIN PGP SIGNATURE- Version: GnuPG v1.0.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQE8yBJGrJK6UGDSBKcRAsl8AJ9QRm9rxPLFhuA8WGI8tUI2zCuJpQCePr25 fgiGmV0QqJ65C1tPC+s2ls0= =RUXP -END PGP SIGNATURE-
Re: Partitioning for amanda
On Thu, 25 Apr 2002 at 4:27pm, Buchan Milne wrote We are just about to start on the upgrade of our Linux file server. When we are done, it will have: - -Approx 100GB SCSI RAID (approx 40% capacity utilised) - -Approx 45GB IDE RAID (approx 60% utilised) - -Approx 45GB IDE dumping disk - -6*20GB(40GB with hardware compression claimed) HP autoloader - -Additional servers totalling approx 100GB, no disk greater than approx 30GB - -Workstations, none with more than 5GB of data to back up. I would like to know what limitations this setup will place on our partitioning of the 100GB SCSI RAID. While it's true that amanda can't span tapes with a single disklist entry, you don't *have* to back up the whole RAID at once. You're only limited to backing up partitions if you use dump (which some people have issues with on Linux). If you're willing (and your tests back you up) to use tar, you can break that RAID up into as many disklist entries as you like. That's what I do to back up our 560GB (93% utilized, damnit) RAID onto 35GB native AIT1 tapes. -- Joshua Baker-LePain Department of Biomedical Engineering Duke University
Re: Partitioning for amanda
On Thu, 25 Apr 2002 at 10:58am, Joshua Baker-LePain wrote On Thu, 25 Apr 2002 at 4:27pm, Buchan Milne wrote We are just about to start on the upgrade of our Linux file server. When we are done, it will have: - -Approx 100GB SCSI RAID (approx 40% capacity utilised) - -Approx 45GB IDE RAID (approx 60% utilised) - -Approx 45GB IDE dumping disk - -6*20GB(40GB with hardware compression claimed) HP autoloader - -Additional servers totalling approx 100GB, no disk greater than approx 30GB - -Workstations, none with more than 5GB of data to back up. I would like to know what limitations this setup will place on our partitioning of the 100GB SCSI RAID. While it's true that amanda can't span tapes with a single disklist entry, you don't *have* to back up the whole RAID at once. You're only limited to backing up partitions if you use dump (which some people have issues with on Linux). If you're willing (and your tests back you up) to use Oops -- I missed the XFS bit. xfsdump on Linux works just fine, and has the advantage of backing up any ACLs or EAs you may be using on that fs. If you're not using those, then tar should work just as well. Sorry 'bout that. -- Joshua Baker-LePain Department of Biomedical Engineering Duke University
Re: Partitioning for amanda
I would say that it depends on your storage space :-) The ration, if compressed should not be calculated 1:2. A better estimate would be 1:1,5 or even lower. I would do my calculation on the amount of the disc not on the capacitiy utilised at the moment. Greets Tom
