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.




--
---------------

Chris Hoogendyk

-
  O__  ---- Systems Administrator
 c/ /'_ --- Biology & Geology Departments
(*) \(*) -- 140 Morrill Science Center

<hoogendyk AT bio.umass DOT edu>

Erdös 4