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Backdraft

Backdraft is a new lossless virtual switch that addresses the slow receiver problem by combining three new components: (1) Dynamic Per-Flow Queuing (DPFQ) to prevent HOL blocking and provide on-demand memory usage; (2) Doorbell queues to reduce CPU overheads; (3) A new overlay network to avoid congestion spreading.

Our NSDI22 Paper describes the Backdraft design and its rationale.

[Paper] [Slide]

What is the slow receiver problem?

Any networked application is potentially a slow receiver if it is unable to keep up with the incoming rate.

System Architetcure

Backdraft

Repo Layout

- /
 - env: all scripts regarding environment setup
 - exp: all scripts regarding experiments in the paper
 - code: all the codes and libraries built for Backdraft
  - tas: tas library for the userspace TCP/DCTCP
  - Homa: Homa openloop app workload generator
  - apps: dummy applications to generate non-cooperative workload.
  - dpdk: DPDK
  - lib: backdraft interface library
  - tas-benchmark: tas applications

For installing Backdraft look here and for some details about experiments look here.

License

MIT

Disclaimer

This is a research prototype.

Help

Please use Github Issues.

Still working on the readme!