klsince opened a new pull request, #9306:
URL: https://github.com/apache/pinot/pull/9306

   This PR is part of the work to support multi-datadir for Pinot server as 
tracked by [issue](https://github.com/apache/pinot/issues/8843).
   
   MultiDirSegmentDirectoryLoader is added in this PR. It implements 
SegmentDirectoryLoader interface. It checks the target storage tier for the 
segment and move it from current tier to the target tier. The tier config is 
extended to include dataDir, so that one can define multi-tier for a table to 
use multiple datadirs to store segments. 
   
   Following PRs will add Controller periodic task to compare segment 
current/target tiers and trigger segment reloading to move them to target tiers 
(datadirs) on Pinot servers.


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