1 / 5

Outline

Outline. Lottery Scheduling: Flexible Proportional Share Resource Management. C. Waldspurger, and W. Weihl - I st OSDI Resource Containers: A New Facility for Resource Management in Server Systems. Gaurav Banga, Peter Druschel, and Jeffrey C. Mogul - 3 rd OSDI. Problem 1.

oneyj
Download Presentation

Outline

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Outline • Lottery Scheduling: Flexible Proportional Share Resource Management. C. Waldspurger, and W. Weihl - Ist OSDI • Resource Containers: A New Facility for Resource Management in Server Systems. Gaurav Banga, Peter Druschel, and Jeffrey C. Mogul - 3rd OSDI CSE 542: Operating Systems

  2. Problem 1 • Flexible, responsive fair share scheduling of resources • Changes should be reflected immediately • Solutions: Priority based allocation • UNIX uses multiple priority levels with round-robin within a priority level and decay-usage • Lottery scheduling: Randomized resource allocation • Responsive • Proportional share • Modular resource management CSE 542: Operating Systems

  3. Lottery Scheduling • Resource rights • Abstract: independent of machine details • Relative: Relative to contention for resource • Uniform: Rights for multiple resource types uniformly represented as tickets • Lotteries: • Probabilistically fair • Order clients with decreasing ticket counts • Tree of partial ticket sums CSE 542: Operating Systems

  4. Modular Resource Management • Ticket transfer: Transfer from one to another client • Ticket inflation: Escalate rights by creating tickets • Ticket currencies: Built on base currencies • Ticket compensation: Fairness for IO bound tasks • Applications: • Client-server • Multimedia • Servers CSE 542: Operating Systems

  5. Problem 2: Resource allocation boundaries • OS notion of protection domain and resource principal coincide with process abstraction • Resource containers separate this abstraction • Resource containers abstract resource allocation across process, kernel boundaries • Applicable for web services etc. CSE 542: Operating Systems

More Related