| No other scheduler we have used | comes close to this kind of performance. Scheduler overhead was | basically insignificant. Probably apples and oranges, but Jim Kent wrote a job scheduler for his kilocluster that nicely handled about 1M jobs in six hours. It's the standard thing for whole genome sequence alignments at ucsc.
| If you look at how most clusters are used today, they closely resemble | the batch world of the 1960s. It is actually kind of shocking. On the other hand, sometimes that's just what you really want.