On Wed, Aug 23, 2006 at 09:43:14AM +0700, Olivier Nicole wrote: > Hi, > > Time to add my 2 cents to that thread, and ask for advice from Amanda > gurus too. > > The way I solvedthe offsite tapes thing is the following: > > I declared: > > dumpcycle 1 week > runspercycle 5 > tapecycle 6 tapes > > I labeled 6*3 tapes, with labels like set-1-00 to set-1-05, set-2-00 > to set-2-05 and set-3-00 to set-3-05. Only set-1 is marked for reuse, > when I reach tape set-1-05, I mark all set-1 as no-reuse and set-2 as > reuse. And etc. > > This way I should have 2 complete cycle, including full and incr to be > offsited. > > Am I doing anything wrong? I find this much straight forward than > having 2 configuration, one for full and one for incr. >
Nothing wrong. Particularly if it works for you. Some sites want only to offsite a set of full dumps. A second config works well for this. Others have a cost consideration for how many tapes physically are offsited (can offsite be a verb? :) I recall one poster saying the commercial storage facility charged by the tape stored and extra for each tape moved back and forth. As you are rotating 18 tapes (3 sets of 6 each) and have 4 runs per cycle, you really have a total of 3.6 "dump cycles" worth of tape, not 3. I'd worry about my schedule for no-reuse/reuse marking. It is not regular. It would be after Monday (Tuesday) to start set 2, then after Wednesday for set 3. Set 1 starts again on a Friday. Opps, that is after Friday, so on Monday. What if you forget to do the remarking of the tapelist? It will go back to using tape 0 of the same set. Perhaps have your cronjob automatically mark the tape used that day "noreuse" and mark the 6th oldest one "reuse". For you, what is the value of having 12 of your 18 tapes marked "noreuse"? Is it necessary to keep setting and resetting them? When I backed up to DDS3 tapes, my changer had magazines that held 6 tapes. So I configured 6 runs/week, Saturday night was skipped and Sunday night (actually Monday morning) collected the 2 day weekend changes. My "SOHO" network was so valuable that of course I had to offsite tapes -- to my neighbors home :) I changed magazines anytime over the weekend. I kept 4 magazines in rotation. Onsite were the one in use, the one to be used next (oldest dumps), and the most recently used for recovery of recent stuff. Offsite was the one from two weeks before. Eventually my magazines no longer synchronized with the weekends and I gave up the offsiting. I'd change magazines when the report said "dumps left in holding disk". Or maybe a day or two later as I had enought holding disk for over a week. I think I still have some archive dumps (different config and magazines) at my neighbors house. -- Jon H. LaBadie [EMAIL PROTECTED] JG Computing 4455 Province Line Road (609) 252-0159 Princeton, NJ 08540-4322 (609) 683-7220 (fax)
