You guys helped me very much!

Thanks!

-----Ursprüngliche Nachricht-----
Von: owner-amanda-users AT amanda DOT org [mailto:owner-amanda-users AT amanda 
DOT org] Im
Auftrag von Chris Lee
Gesendet: Dienstag, 25. Juli 2006 09:57
An: amanda-users AT amanda DOT org
Betreff: Re: AW: Question about dumbcycle, tapecycle and runspercycle

The simple answer is YES, or set it to less if you want more than 2 
Generations in your 14 tapes.

The explanation is:
runspercycle is how many times will backups be run during dumpcycle.
So it can be any number less than or equal to dumpcycle.

If you have "tapecycle 14 tapes" then you are going to use 14 tapes 
before you start at the beginning and delete old backups.
If you have "dumpcycle 7" that means you will have a FULL backup within 
7 days, Aamanda will make sure that all data is fully backed up within 7 
days, not on any specific one of those days however.
Then if you have "runspercycle 7" Amanda will expect that you will run 
amanda 7 times during the seven days, and will make sure that the full 
backup of your data is made during those runs.
If you had only "runspercycle 2" then Amanda will expect you to only run 
two backups within the 7 day dumpcycle and will make sure that the full 
backup of your data is made during those two runs and gives you 7 
generations of backups.

I hope this is easy for you to understand, good luck, Amanda has worked 
very well for me.

Chris.

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
> 
> 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
>