X-Git-Url: http://git.squeep.com/?p=websub-hub;a=blobdiff_plain;f=README.md;h=5af15f0668c5fca11c22b55e41276860633435ea;hp=138e4583cbd3c6d247d29d8a934beb1692b1823b;hb=fa43eebc41a180679085e36b299728c8172f88e5;hpb=944e7dc61a951aa870160aeb390d5bd053cdd224

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@@ -114,6 +114,8 @@ The Hub keeps track of three primary entities:
 
 Any tasks in progress (notably: fetching new topic content, distributing that content to subscribers, or confirming pending verifications) are doled out and managed by a cooperative advisory locking mechanism.  The task queue is wrangled in the database within the `*_in_progress` tables.
 
+![Entity relationship diagram for Postgres engine](./documentation/media/postgres-er.svg)
+
 A Hub node will periodically check for more tasks to perform, executing them up to a set concurrency limit.
 
 ### Quirks