title: kafka log-compaction consuming data
body: <p>I'm reading about log compaction in the latest release of kafka and am curious how this impacts consumers. Do consumers work the same as they ever did, or is there a new process for getting all the latest values?</p>
  
  <p>With 'standard' Kafka topics, I use a consumer group to maintain a pointer to the most recent values. But if Kafka is keeping values based on keys instead of time, I'm wondering how consumer groups will work?</p>