Greetings.
I've got a peeve about how TSM reclaims collocated stgpool volumes, and I wanted to see if it is widely shared. If so, I'll try to distill it into a sane feature request. I've got a bunch of collocated stgpools now, and I find that I am frequently reclaiming volumes which are in a FILLING state. This seems to be counterproductive to me. I understand the math behind it: If pct_reclaim >= threshold, then it's a candidate for reclamation. But my motiviation to reclaim a tape that is only 20% written is mighty low. I'd just as soon wait another week/month/whatever, and use the tape drive time to do other things. I find that reclamation occupies more tape-head time than any other activity my TSM server does; I'm essentially never idle unless I've specifically cleared the decks for some reason. So spending a lot of time doing "work" that doesn't buy me anything is aggravating. So, I ask: Is there some aspect to this I'm missing? An advantage to reclaiming a tape that's "50% reclaimable" but only 40% written? A knob that already exists to limit reclamation to full volumes? Or is this same behavior irritating to you folks too? - Allen S. Rout