[tor-bugs] #18910 [Metrics/CollecTor]: distributing descriptors accross CollecTor instances

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#18910: distributing descriptors accross CollecTor instances
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 Reporter:  iwakeh             |          Owner:  iwakeh
     Type:  enhancement        |         Status:  needs_review
 Priority:  High               |      Milestone:  CollecTor 1.1.0
Component:  Metrics/CollecTor  |        Version:
 Severity:  Normal             |     Resolution:
 Keywords:  ctip               |  Actual Points:
Parent ID:                     |         Points:
 Reviewer:                     |        Sponsor:
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Comment (by karsten):

 Replying to [comment:23 iwakeh]:
 > This way of configuring only works for the current relaydescs module
 (whose properties are supposed to be removed partially in #20162).

 We're planning to remove properties there, but none of those properties
 would enable or disable a descriptor source.

 > The other two modules, bridgedescs and exitlists, don't have any
 additional properties that could be used for avoiding the 'SyncOnly'
 option.

 Yes, we'd have to add two boolean options for those rather than one tri-
 state.

 > In general, it is nicer to have a configuration value that expresses
 what it means.  The different download options for the relaydescs module
 where initially quite confusing.

 I admit, I forget to enable descriptor sources from time to time myself
 when setting up a new CollecTor with relaydescs module for testing.

 > But maybe, I complicate things?  So what other 'streamlined' way could
 achieve the SyncOnly setting?

 Let's think about it.  We have 1 module with soon 4 descriptor sources and
 2 modules with soon 2 descriptor sources.  How would you define config
 options to let operators activate each of the modules with any possible
 combination of descriptor sources?  And keep in mind that we might want to
 add a 5th or 3rd descriptor source in the future.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18910#comment:26>
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