[GitHub] [trafficcontrol] rob05c commented on pull request #5093: Validate DS topology w.r.t. required capabilities

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rob05c commented on pull request #5093:
URL: https://github.com/apache/trafficcontrol/pull/5093#issuecomment-702868594


   Should this warn, but not error?
   
   For example, someone might want to assign just one particular server, or just a few servers, to a test DS. This makes that impossible, without a custom topology.
   
   Or, someone might have an actual capability, like an ATS plugin, that they've deployed to a number of caches, but maybe they have some small cachegroups without many caches, that they don't really want to upgrade, and they're ok with clients going to a nearby large cachegroup instead. 
   
   So maybe they get a message, "Warning: no servers in cachegroup 'LittleRock', requests for this Delivery Service will not be routed to that Cachegroup!" But maybe they're ok with that, because their Nashville datacenter is nearby and large.


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