npawar opened a new issue #5553:
URL: https://github.com/apache/incubator-pinot/issues/5553


   Motivation:
   Consider use cases which have Pinot tables that have very large retention, 
but typically only query the most recent segments. Or use cases where very low 
latency is expected when querying the recent data, and are more tolerant of 
slightly higher latencies when querying historical data which is very old. In 
order to optimize for low latency, we often recommend using high performance 
SSDs. But if such a use case has 2 years of data, and need the high performance 
only when querying 1 month of data, it might become desirable to keep only the 
recent time ranges on SSDs, and keep the less frequently queried ones on 
cheaper and modest nodes (say HDDs). 
   
   Design proposal doc: 
https://docs.google.com/document/d/1Z4FLg3ezHpqvc6zhy0jR6Wi2OL8wLO_lRC6aLkskFgs/edit#


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