  Utilization enhancement is a key concern to cluster owners. Google's cluster
manager named Borg manages its clusters at an overall utilization higher than
many others' clusters. Recently, Google has disclosed the details of its
powerful cluster manager Borg. Quite a few lessons are summarized from the Borg
experiences. Nevertheless, we find that more can be learned if the Borg design
is correlated with the trace analysis of a Google cluster managed by Borg.
There is one such trace released four years ago. In this paper, we analyze the
Google cluster trace and make 10 observations not found in previous analyses.
We also correlates the results of our analysis and previous analyses to the
Borg design, such that we find two measures that can possibly further improve
cluster utilization over Borg.
