klsince opened a new issue, #8843:
URL: https://github.com/apache/pinot/issues/8843

   As of today, [a table with 
multi-tiers](https://docs.pinot.apache.org/operators/operating-pinot/tiered-storage#tier-config)
 has to use different server pools to support multi storage tiers, and relies 
on SegmentRelocator to move the segments among those server pools to put them 
on the right storage tier. An example cluster setup may be like using a pool of 
servers with SSD as a tier and another pool of servers with HDD as a second 
tier. 
   
   But this model doesn't work when a server have both SSD and HDD, and wants 
to define multi tiers backed by them. 
   
   We'd like to address this issue. And one possible way is to implement a 
SegmentDirectoryLoader that's aware of multi data dirs; and enhance current way 
of tier migration to move segments across tiers even if they are not relocated 
to a different server, i.e. to be done on the same server locally.
   
   
   


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