On Friday 21 March 2003 13:13, Sergio Pereira wrote: >Hi list, > >I'm trying to setup amanda to backup 52 weeks with incremental daily > and every week a full backup. My amanda.conf shows like: > >dumpcycle 7 >runspercycle 5 >tapecycle 55 tapes > >for sure I'm doing something wrong .. what is it? >when I run amadmin to check the due date for each disk I get: > >Due in 367 days: backupserver:/etc >Due in 361 days: backupserver:/var >Due in 362 days: backupserver:/home
Based on the numbers above, this does NOT make sense. >question: how do I modify my amanda.conf to meet my 52 weeks >configuration? First, don't worry about either the 52 weeks, or the full backups when you use amanda. The only place the 52 weeks comes in is in determining if you actually need that many tapes (365 or more) actually on the shelf. You see, amanda does her own scheduleing based on the tapecycle, dumpcycle, and runspercycle you give her. You can, with creative scripting, force amanda into your form fitting box, but amanda won't be 100% happy & you'll be much better off to just let amanda do the schedueling as she tries to balance out things so about the same amount of data is saved on every run, thereby makeing much more efficient use of the available tape capacity. I fill a 4Gb tape to >95% for every run here by letting amanda think for herself. With your current settings of dumpcycle 7, runspercycle 5, and tapecycle 55, you are guaranteed that amanda will do a full dump of everything in the disklist "at some point in the 'runspercycle' of that dumpcycle of 7 days. Ergo, at least once a week. So thats fine, and if in the unlikely event you must do a recovery, then everything you need should be on the last 5 tapes amanda has written. However, if you want a full years backup on hand, 55 tapes will only give you 11 weeks before amanda will start asking for the first tape again. Amanda will not re-use a tape until the number of tapes in the 'tapecycle' have been used. With the above figures, you will have on hand the ability to restore the system to its state at the end of virtually any day in the past 11 weeks, or said another way, you'll have 11 full backups on hand. Most of us are happy with 2 or 3, like I'm currently using dumpcycle=8, runspercycle=8, and tapecycle=28, (small drive here, can't get it all in 7 days) so I have about 3.5 full backups at any one time. For business archival useage, and needing a year, then you'll need 260 tapes and tell her 260 in the tapecycle value.. I'm not 'in business' so to me, 260 tapes is serious overkill even at $2 a tape for DDS2's on ebay. :-) >thx all, > >sergio -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) 99.22% setiathome rank, not too shabby for a WV hillbilly Yahoo.com attornies please note, additions to this message by Gene Heskett are: Copyright 2004 by Maurice Eugene Heskett, all rights reserved.
