In https://issues.apache.org/jira/browse/YARN-1051, carlo use resource reservation over time to ensure SLAs.
I think it is important toward SLAs, however, I think it will hurt resource utilization as the more stringent constrains, the scheduler has less flexibility to optimize the execution plan. Is it right? If it is not, in which scenarios, scheduler can benefit from resource reservation? -- *Regards,* *Zhaojie*
