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: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Im Auftrag von Gene Heskett >Gesendet: Dienstag, 25. Juli 2006 15:13 >An: [email protected] >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: [EMAIL PROTECTED] >> [mailto:[EMAIL PROTECTED] Im Auftrag von Jon LaBadie >>Gesendet: Dienstag, 25. Juli 2006 08:34 >>An: [email protected] >>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.
