[Nottingham] Amanda Tape Backup
ghenry at suretecsystems.com
Thu Apr 24 19:38:58 BST 2008
<quote who="Richard Bagshaw">
> Morning Guys,
> Bit of a novice when it comes to Amanda tape backup systems, but I have
> chosen this path and so far im happy with it -- the system I have at the
> moment is a Centos server with an internal scsi LTO-2 tape drive with 10
> tapes @ 200/400gb each. I have everything working correctly and each
> it will run the crontab and perform its backup. My slight confusion comes
> with the whole dumpcycle, tapecycle, runspercycle and runstape thing ...
> Firstly, as I understand it the definitions for these terms are as follows
> dumpcycle (currently 2 weeks) = the length of time that it takes to
> a full set of backups, after this amount of time we start putting in tape
> again etc to be overwritten
> tapecycle (currently 10) = the number of tapes available
So you are running amdump 5 times a week?
> runspercycle (currently 9) = how many backups to perform (full and/or
> differential) during the dumpcycle, so if the dumpcycle was 2 weeks and
> runspercycle was 9 then it would do 9 backups in the two week period?
Yes. So the first week you run amdump mon-fri, second, mon-thu.
I would have 12 and tapecycle 12, in case anything goes wrong over 10 runs.
> runtapes (currently 1) = how many tapes each backup task should use, in my
> case - no autoloader, so this is 1
> What I would ideally like is to have two sets, both using 5 tapes, so ...
> Week 1 : TapeSet01
> Week 2 : TapeSet02
> Week 3 : TapeSet01
> Week 4 : TapeSet02
> The reason I want todo this is because I want to be able to take offsite
> backups, and since amanda manages the whole schedule of when it does a
> backup it kinda makes it impossible to know when to take a single tape
> offsite, so im thinking at the end of each week just take away one set, or
> is there another better way to deal with offsite backups ?
See the amanda wiki, for "archive" and "offsite"
> Anyone had any experience with amanda and this kind of setup im trying to
> acheive? I know 10 tapes is an odd low number, but thats budgets I guess
> ... :/
> Thanks again...
> Richard Bagshaw
> richard at bagshaw.co.uk
> Nottingham mailing list
> Nottingham at mailman.lug.org.uk
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