On Sat, Dec 30, 2017 at 08:33:42AM -0500, Ned Danieley wrote: > > and on the other side of the coin, is there any way to encourage the planner > to do more level 0 dumps in a given day? > > I occasionally find, often after a kernel update/reboot, that amanda > thinks that a large number of DLE are 'new', and fairly quickly moves them up > to level 2. but then the planner leaves them at L2 for days or weeks, at the > same time using less than 1 TB of my 2.5 TB tape. > > I know that I can force a level 0, but that has to be done on each DLE. it > seems like there should be a way to tell just amanda to use a larger > fraction of the tape, but I can't figure it out. >
As an ideal, amanda tries to get consistant size dumps each run of amdump. As an approximation this size can be estimated (using post-compression data) as the sum of all level 0's divided by the number of runs per dumpcycle plus the average daily level 1 sizes. So you can get larger runs by three means, get more data (bigger level 0's), become more active (bigger level 1's) or shorten the dumpcycle (or runs/dumpcycle). Sounds like you may want to shorten your dumpcycle. Note, dumpcycle is a "dumptype" parameter. I.e. thought there is a global default value for dumpcycle, new dump- types can be defined with a different dumpcycle. In my case I have my photos and my music backed up in their own DLEs, 5 DLEs in the case of photos. These are nearly static DLEs, so no need to back them up each week. I defined a separate dumptype to have a 3 week dumpcycle and these 6 DLEs use that dumptype. You may want to define a dumptype for your more precious DLEs with a shorter dumpcycle which will cause them to be dumped at level 0 more frequently. Or just shorten your default dumpcycle. Jon -- Jon H. LaBadie [email protected] 11226 South Shore Rd. (703) 787-0688 (H) Reston, VA 20190 (703) 935-6720 (C)
