[tor-bugs] #13630 [Torflow]: Bandwidth Authority Renovation

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#13630: Bandwidth Authority Renovation
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 Reporter:  aagbsn   |          Owner:  aagbsn
     Type:  project  |         Status:  new
 Priority:  normal   |      Milestone:
Component:  Torflow  |        Version:
 Keywords:           |  Actual Points:
Parent ID:           |         Points:
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 This ticket describes the Bandwidth Authority Refactoring Project.

 Goals:
     Replace pyTorCtl with stem[1] or txtorcon
     Address Critical Issues
     Address Scalability Issues
     Implement New Feedback Mechanisms

 Critical:
     Bandwith Authorities are leaving 10 percent of the network unmeasured
     https://trac.torproject.org/projects/tor/ticket/13450

     Understand how accurate the bandwidth authority estimates are
     https://trac.torproject.org/projects/tor/ticket/7177

     The slowest fraction of the network takes 18 hours to complete
     https://trac.torproject.org/projects/tor/ticket/9795

     BwAuth takes a long time to scan the network
     https://trac.torproject.org/projects/tor/ticket/13449

     Make a torflow option that starts every testing circuit at a local Tor
 relay first
     https://trac.torproject.org/projects/tor/ticket/9762
 Decentralize:
     Decentralized measurement for network load balancing
     https://trac.torproject.org/projects/tor/ticket/5464
 Parallelise:
     Split BwAuth children more equally
     https://trac.torproject.org/projects/tor/ticket/3440

     Increase the number of parallel scanners in a BandwidthAuthority from
 4 to 8
     https://trac.torproject.org/projects/tor/ticket/9795

 Feedback Mechanisms:
     Implement bwauth cap for latency
     https://trac.torproject.org/projects/tor/ticket/4708

     Implement bwauth cap for TCP socket exhaustion
     https://trac.torproject.org/projects/tor/ticket/4709

     Bwauth: Use only "slow" measurements for positive feedback
     https://trac.torproject.org/projects/tor/ticket/4730

     Bandwidth auths should publish average and weighted onionskin failure
 rates
     https://trac.torproject.org/projects/tor/ticket/7281

     Detect overtuned exit relays
     https://trac.torproject.org/projects/tor/ticket/10791

 untracked issues?:
     Scalability - how are the BwAuths scaling?
     How long does this take?
     How much longer will it take with 10000 relays?
     Network stability?
     Circuit failure rates?
     Partition detection?

 papers:
     EigenSpeed: Secure Peer-to-peer Bandwidth Evaluation
 https://www.usenix.org/legacy/event/iptps09/tech/full_papers/snader/snader.pdf
     http://www.cs.ucla.edu/~nrl/CapProbe/

     Requirements and Software Design for a Better Tor Performance
 Measurement Tool
     https://research.torproject.org/techreports/torperf2-2013-10-30.pdf

 [1] stem is "is a synchronous (threaded) Python library". There is/was? a
 plan to integrate it with txtorcon[2].

 [2] https://www.torproject.org/getinvolved/volunteer.html.en#txtorcon-
 stemIntegration

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/13630>
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