taper algo change

[Orion Poplawski]

Would it be possible for the driver not to queue up a tape job in 
startaflush()?  I'm using LARGESTFIT, but for the most part dumps end up 
getting flushed to tape as they come in because there is often only one 
dump in the queue when startaflush() is called.  I would like it if (at 
least with LARGESTFIT) that if there are more dumps to come in and the 
current dumps DON'T fit that it waits until the next dump finishes to 
try again.  This would allow smaller dumps that come in later (due to 
various factors) to get onto the tape and make more effecient use of the 
tape.

My proposed change would be something like:

       case ALGO_LARGESTFIT:
               fit = tapeq.head;
               while (fit != NULL) {
                   if(sched(fit)->act_size <= tape_left &&
                      (!dp || sched(fit)->act_size > sched(dp)->act_size) &&
                      strcmp(sched(fit)->datestamp, datestamp) <= 0) {
                       dp = fit;
                   }
                   fit = fit->next;
               }
               if(dp) remove_disk(&tapeq, dp);
!               else if(dumps_left_to_do()) return;
               break;
but I don't know what "dumps_left_do_do()" needs to be.

--
Orion Poplawski
System Administrator                   303-415-9701 x222
Colorado Research Associates/NWRA      FAX: 303-415-9702
3380 Mitchell Lane, Boulder CO 80301   http://www.co-ra.com