Chris Hoogendyk wrote: > > Onotsky, Steve x55328 wrote: >> I agree, but the caveat is that the planner will do its darndest to make >> full use of the extended capacity of the LTO4 cartridge. >> >> In my case, our backups went from between 5 and 8 hours with LTO2 tapes to >> well over 24 hours in some cases with the LOT4s - same DLEs. It took some >> fancy footwork to get it to a reasonable window (about the same length of >> time as with the 2s but some of the larger DLEs are forced to incremental on >> weekdays). This is so we can get the cartridges ready for pickup by our >> offsite storage provider. > I don't get that at all. Doesn't make sense. Were there other things you > changed? Or did you previously have much more designated for backup than your > system and/or configuration could handle and the planner was always falling > back? Maybe you had a setup that would result in 800G per day if it could, > but you had a runtapes of 1, so Amanda was constantly forced to back up less > than what it should have? Then you gave it LTO4 and it began to do what it > should have all along? > > In my own case, I use much less than the capacity of my tapes. The > designation of a dumpcycle of 1 week and runspercycle of 7 means I basically > get 1 full per DLE per week, though that may vary slightly. I don't get how > having a larger tape is going to affect that at all. >
Amanda gets wonky if your tape is much larger than your backups, or at least it does with 2.5.1p2. On one configuration with a 50GB tape (that can hold about two weeks of daily backups), Amanda was constantly promoting fulls trying to level out tape usage, but I really didn't want full backups every 2 or 3 days. If I had, I would have set dumpcycle to 2 or 3 days, but it was set to 5. Since I was trying to fill tapes by leaving dumps on the holding disk and only occasionally flush them to tape, I really didn't want all the incrementals constantly get promoted to fulls, wasting my holding disk space. Eventually I just forced it by setting maxpromoteday to 4 or 5 days, which solved the problem for me. Perhaps part of the issue was the result of having a couple of relatively larger DLEs and several smaller ones, making level tape usage impossible, no matter how they were arranged. Frank -- Frank Smith fsm...@hoovers.com Sr. Systems Administrator Voice: 512-374-4673 Hoover's Online Fax: 512-374-4501