On Tuesday 25 July 2006 11:46, Sebastian Kösters wrote:
>I forgot to say.
>
>I did that because my backup size is between 40 and 160 GB each tape,
> every day. So i set it to 300 to guarantee that the end of the tape
> is never reached and that i do not get the error "tape full".
>
>Hope you unterstand what i mean
Thats a lot of data, much more than I have.
Also, as another has commented, please either add your replies under the
statement they apply to, or at the bottom of the message. I also note
that the quoteing depth indicator for keeping track of who said what,
thats all those >> >> characters, is not working in your email agent.
Humm, "X-Mailer: Microsoft Office Outlook 11". Typical, and I have no
idea if it can be fixed, I never tried. I have one machine with a copy
of xp on it, an HP lappy, owned it for about 5 months now, its been
booted to xp maybe 10 times since I installed the battery. To me, xp
is painfull, and naproxin sodium does nothing for the headache it
causes. FC5 does it nicely on that lappy.
>>Hi,
>>
>>all together i have 2 TB.
>>
>>I use 8 configs (4 with 14 tapecycles each and 4 with 1 tapecycle
>> each).
>>
>>In each config i told amanda to use a maximum of 300GB.
>>
>>Which size would you use?
>
>-----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 15:13
>An: amanda-users AT amanda DOT org
>Betreff: Re: AW: Question about dumbcycle, tapecycle and runspercycle
>
>On Tuesday 25 July 2006 03:53, Sebastian Kösters wrote:
>>Thanks!
>>
>>That helped me.
>>
>>I do the backup only weekdays so i set tapecycle to 14, runspercycle
>> to 5 and dumpcycle to 7.
>>
>>Runtapes is set to 1.
>>
>>I use 300GB Vtapes....thats enough for my Backups.
>
>Are you saying that you have a 300GB drive for your vtapes, or that
> you will have 14 300GB drives? This will make a huge difference in
> the capacity you set the tapetype for. If its a single drive, then
> divide that 300 GB by 14 to get your tapesize, which would be about
> 20GB per vtape. There will be about 10% used for filesystem overhead
> and the above 20GB should pretty much take that into account, so that
> if all the vtapes are filled to that level, the drive will also be
> 90% full.
>
>Unless you have a really humungous system, you may find after a couple
>of weeks running that the drive isn't filled very well, in which case
> I would make a few more vtapes and add to the 'tapecycle' figure.
> The percentage of fill will determine how many more vtapes to make,
> but leave the last 10% for a cushion.
>
>Also, when first starting up, if all dle's are enabled, amanda may
> take 2 or 3 days to make the first level 0's on some dle's, but once
> caught upp, then you emails will then show you that amanda is
> adjusting the schedule to bring the night to night amount of tape
> used into 'balance'.
>
>You can get a feel for this balance by running "amadmin configname
>balance", but even after extensive runtimes, these figures are only
>guesses at what it will do on the next run.
>
>>-----Ursprüngliche Nachricht-----
>>Von: owner-amanda-users AT amanda DOT org
>> [mailto:owner-amanda-users AT amanda DOT org] Im Auftrag von Jon LaBadie
>>Gesendet: Dienstag, 25. Juli 2006 08:34
>>An: amanda-users AT amanda DOT org
>>Betreff: Re: Question about dumbcycle, tapecycle and runspercycle
>>
>>On Tue, Jul 25, 2006 at 07:29:02AM +0200, 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?
>>>
>>> If not, what must i set at tapecycle, runspercycle and dumpcycle to
>>> get
>>
>>this
>>
>>> work?
>>
>>Only one is certain, dumpcycle 7, gives you a level 0 (full) backup
>>of each DLE ``at least'' once every 7 days.
>>
>>runspercycle is how many times you will have crontab run amdump
>>during each dumpcycle. If you do it once every day, runspercycle
>>should be 7. If only on weekdays, 5, if only Mon, Wed, Fri, 3.
>>
>>Your setting of runspercycle 13 would be most unusual.
>>With dumpcycle 7, it would suggest twice a day except only once
>>on ?tuesdays?
>>
>>Lets assume daily runs, even on weekends, so runspercycle 7.
>>With dumpcycle 7 that matches my two settings.
>>
>>We still can't determine a minimum value for tapecycle without one
>>other parameter, runtapes. This is how many tapes, physical or
>>virtual, amanda might use for each run of amdump. Not how many
>>it will use, how many it is allowed to use if needed. My nightly
>>backups generally fit a single tape. But occassionally it overflows
>>to a second. So I have runtapes 2.
>>
>>Now the calculation for tapes needed in the cycle is essentially:
>>
>> # cycles to retain X runspercycle X runtapes
>>
>>I wanted 4 or 5 cycles worth of backups (about a month). That would
>>be 5 X 7 X 2 == 70. But, because I determined that I would not be
>>using a second tape except occassionally, I'm comfortable with a
>>little more than 1/2 that number, I have a tapecycle of 40.
>>
>>If my environment adds a lot more data, or some more clients, either
>>I will not be able to retain 5 cycles worth of backups, or I will
>>have to add another external disk for more vtapes.
>>
>>HTH
--
Cheers, Gene
People having trouble with vz bouncing email to me should add the word
'online' between the 'verizon', and the dot which bypasses vz's
stupid bounce rules. I do use spamassassin too. :-)
Yahoo.com and AOL/TW attorneys please note, additions to the above
message by Gene Heskett are:
Copyright 2006 by Maurice Eugene Heskett, all rights reserved.
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