Parallelize topics - consumer groups #267
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This PR allows us to have more than one consumer reading a single topic. By creating multiple consumers on the same topic, but ensuring that they use the same
group.id, kafka will divide the partitions of a topic between the consumers subscribed to it. This should allow us to read topics quicker, though networking can still be a limiting factor.In the future, we can definitely consider having a dynamic number of consumers, adding and removing consumers as we accumulate delay/lag. Also, we might want to read the number of partitions on a topic to make sure we don't create more consumers than partitions (in which case we would have idle consumers).