Deny reservation if expected backfill size would put us over backfill_full_ratio
We currently just check the full status based on disk usage. We need to adjust for the amount of data expected less the data already present.
Need to add the pg stat total in the reservation request?
during backfilling after a failed disk the log files get spammed with do_backfill messages. log files easily grow beyond several GiB within hours
is this expected behavior or is the log level on the dout too low?