On Tuesday 25 July 2006 03:24, Sebastian Kösters wrote:
>Hi and thanks.
>
>My english is not so good so i have to ask again.
>
>When you say
>
>" You'll probably want runspercycle to match the dumpcycle, that will
> make sure you have 2 generations of backups before a tapecycle of 14
> would overwrite the 2 week old vtapes."
>
>Did you mean i must set runspercycle to 7 like i did with dumpcycle to
> get 2 Generations of backups in the 14 Days tapecycle?
>
>tapecycle 14 tapes
>runspercycle 7
>dumpcycle 7
>
Yes, and then just set it in the user amanda's crontab to run every 
night in the wee hours, while you're getting a good nights sleep.

How are you installing amanda?  From tarball, or some package manager?

>Thanks!
>
>
>-----Ursprüngliche Nachricht-----
>Von: owner-amanda-users AT amanda DOT org
> [mailto:owner-amanda-users AT amanda DOT org] Im Auftrag von Gene Heskett
>Gesendet: Dienstag, 25. Juli 2006 08:09
>An: amanda-users AT amanda DOT org
>Betreff: Re: Question about dumbcycle, tapecycle and runspercycle
>
>On Tuesday 25 July 2006 01:29, Sebastian Kösters wrote:
>>Hi!
>>
>>A short question.
>>
>>I would like to have the possibility to recover a backup thats 14
>> Days old.
>>
>>I want to use virtuel tapes and a tape-changer for this.
>>
>>Every 7 Days Amanda should do a full-backup.
>>
>>Am i right that i need a tapecycle of 14 a runspercycle of 13 and a
>>dumpcycle of 7?
>
>You'll probably want runspercycle to match the dumpcycle, that will
> make sure you have 2 generations of backups before a tapecycle of 14
> would overwrite the 2 week old vtapes.
>
>However, bear in mind that unless you severely constrain amanda, you
>will not have a full backup of everything on the 7th day, but on a
>disklist entry to disklist entry basis, any one disklist entry will be
>given a level 0 (full) backup ay sometime within that 7 day
> constraint.
>
>Amanda wants to be frugal with the resources, so rather than making
> you buy a 300+ GB tape drive thats only filled up on Friday night
> with the rest of the weeks tapes only using <5GB of a 300 GB tape,
> instead amanda can run with a much smaller tapesize, adjusting the
> schedule such that an 8GB vtape will have 90+% usage every night. 
> I'm using vtapes here, using 180GB of a 200GB drive in 21, 8 GB
> vtapes to backup a pair of machines with a combined 120GB of drives
> whose partitions are generally over 70% used, with a tapecycle of 21,
> and
>runspercycle/dumpcycle of 4, so I have the ability to reach back 21
>days if I have to.  Usage of the partition the vtapes are on runs
> about 85% ATM.
>
>Amanda will work very well for those that can grok how amanda does
>things, but those users coming in from other, more manually scheduled
>backup schemes may have trouble making the transition to the amanda
> way of doing things.  Amanda is intended to be run from a crontab
> entry, and in the case of vtapes, all you have to do is read the
> email amanda sends you at the end of the run, everything else is
> self-contained & does not need human interference 99% of the time.
>
>>If not, what must i set at tapecycle, runspercycle and dumpcycle to
>> get this work?
>>
>>Thank you very much!
>>
>>Kind regards
>>Sebastian

-- 
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