TODO

7) Finish the documentation of state and compact package +



1) Recover SSTables + CompactionDone                                    -> done
4) Correct the bug in applying state                                    -> done
9) Add support for incrementing/decrementing reference count in SSTable -> done
2) Delete SSTable file                                                  -> done
4) Integrate the iterators from different levels in Get                 -> done
5) Integrate the iterators from different levels in Scan                -> done
8) Improve the test: TestStorageStateLoadExistingStateAfterCompaction after point 4 and 5 -> done
3) Integrate compaction in Db                                           -> done
6) Finish TODOs                                                         -> done
7) Finish the documentation of SSTableCleaner                           -> done