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CSE 60641: Operating Systems

CSE 60641: Operating Systems. Resource Containers: A New Facility for Resource Management in Server Systems. Gaurav Banga, Peter Druschel, and Jeffrey C. Mogul, OSDI'99 What is the problem being addressed?. OS as a resource manager….

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CSE 60641: Operating Systems

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  1. CSE 60641: Operating Systems

  2. CSE 60641: Operating Systems • Resource Containers: A New Facility for Resource Management in Server Systems. Gaurav Banga, Peter Druschel, and Jeffrey C. Mogul, OSDI'99 • What is the problem being addressed? CSE 60641: Operating Systems

  3. OS as a resource manager… • Operating systems manage resource consumption: keeps track of how much a particular application has used in order to decide on how much to allocate in the future • If a process is CPU intensive (measure CPU), then less aggressively schedule process • Problem: Resource management is conflated with process/thread • Many scenarios (servers: web, file, …), many processes/threads perform same operation, many operations performed by same process/thread CSE 60641: Operating Systems

  4. Resource container… • Make resource accounting explicit and separate from process/thread • Create a resource container, assign it to a operation. Every time this operation consumed resources, the OS will charge it. The OS schedulers will use this resource consumption metric to provide appropriate service (QoS) • Each process is endowed with a certain amount of “resources” which it can then split among many operations. • Lottery scheduling is one such mechanism • LAR is another work from these authors will allows network operations to be charged to a RC early CSE 60641: Operating Systems

  5. Issues • What is a resource, how do you unify various resources (e.g. CPU, network, memory etc.) • Defining resources is a perennial problem. OS makes decisions on whether one resource is more important than another • In traditional OS, kernel resource consumption is (approximately) added to the process which it relates to. Why do we need to muck with it? • Soon so that disk/network requests can get better QoS • So that we can be fair. • What if we take it all the way? What happens to operations that are shared by multiple RC? CSE 60641: Operating Systems

  6. Challenges • What about other forms of distributed computing? • Grid computing? • Can this be used to fight denial of service attacks? • What about interrupt overhead? • Performance cost of too many RC CSE 60641: Operating Systems

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