[tor-bugs] #26970 [Core Tor/Tor]: Privcount: plan the modules and components

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#26970: Privcount: plan the modules and components
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 Reporter:  teor                                 |          Owner:  teor
     Type:  task                                 |         Status:
                                                 |  assigned
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  0.3.5.x-final
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  privcount, 035-roadmap-master, 035   |  Actual Points:
  -triaged-in-20180711, rust                     |
Parent ID:  #25669                               |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by chelseakomlo):

 Ok, here are a few questions/clarifications:

 1. Tor main codebase will include:
 - The Rust "Data Collector" module
 - Tools for creating/validating configuration.
 Question: Will the configuration management tooling also be in Rust? Or
 will this be part of tor's existing configuration validation/etc? Will
 this configuration management be the same as for the Tally Reporter?
 2. A separate pure-Rust binary
 - This will be the "Tally Reporter"
 Question: Will this binary be a sidecar to Tor relays, or will this be
 stand-alone (like a bwauth)? How will this communicate with the Rust
 module in core tor?

 Maybe the first step is to separate out these components (if they aren't
 already, apologies if I missed that)? The pure-Rust binary will be much
 easier, and reviewing it will be different than reviewing components that
 will integrate with C (for example, logging will be different, etc). Maybe
 then the second step is to work on integrating the Rust "Data Collector"
 into core tor, and there we can do a review for the FFI layer, etc?

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/26970#comment:1>
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