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xOMB

xOMB. Incrementally scalable architecture for middleboxes Presenter : Donghwi Kim. Overview. What is middlebox ? P rocess, forward and modify traffic between source and destination. R outers and switches can also be classified as middleboxes xOMB is an active middle box

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xOMB

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  1. xOMB Incrementally scalable architecture for middleboxes Presenter : Donghwi Kim

  2. Overview • What is middlebox? • Process, forward and modify traffic between source and destination. • Routers and switches can also be classified as middleboxes • xOMB is an active middle box • Performs programmable traffic processing based on entire packet contents

  3. Load Balancing Switches • Although xOMB design is for general middlebox, we will examine it with load balancing switch scenario. • LBS with xOMB • Packet-payload granularity • Additional functionalities: • Re-writing HTTP 1.0 requests as 1.1 • Connection collapsing

  4. xOMB LBS Architecture

  5. Design of xOMB Server • Modules • Pipelines

  6. Example pipeline: HTTP

  7. Control Plane • Membership • No manual configuration for adding or removing servers • The controller assigns every middlebox a set of servers to monitor • Monitoring • Each middlebox collects load information from a set of servers assigned by controller • Failure Detector • Each middlebox pings to their monitored servers

  8. Design Discussion • Advantages of callback(Typical programmable middlebox) • Straightforward to implement simple protocol-specific handling • Advantages of modular pipelines(xOMB) • Asynchronous modules allow messages processing to perform RPCs to retrieve or store state over the network • Pipelines are more flexible because they are not limited to a fixed set of protocols or callbacks • xOMB pipelines elegantly allow modules to pass arbitrary per-message state to other modules (message metadata). • xOMB pipelines are potentially more efficient, because parsing modules only need to parse minimal amount of bytes.

  9. Messages & Buffer Management

  10. Message Reordering

  11. Evaluation

  12. Evaluation

  13. Evaluation

  14. Evaluation

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