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This is just listed from outer to inner., the outermost item in the nested list being the first. 

LSM on-disk resources (i.e. AsterixDB native storage)

• IODevice (~= Mount point , contains seralized root recovery metadata object (asterix_root_metadata))
  • Partition / partition replicas  (i.e. many)
    • Dataverse (e.g. 'Metadata')
      • Index (folder, like 'Metadata_idx_Metadata' for the primary )
        • Index files and serialized recovery metadata ( _b for BTree, _f for Bloom filter, _r for RTree, etc.)

...

• )
  • storage
    • partition
      • dataverse
        • feed
        • dataset
          • rebalance-count
            • Index

Transaction logs

• txnLogDir (base folder for transaction logs)
  • asterix_transcation_log[1-99] (The logs themselves, there should be one to three of these files).
  • checkpoint_[Unix Timestamp] (Files that denote soft checkpoints)