* Update rocksdb to v0.16.0
* Promote the infrequent and important log to info!
* Force background compaction by ttl without manual compaction
* Fix test
* Support no compaction mode in test_ledger_cleanup_compaction
* Fix comment
* Make compaction_interval customizable
* Avoid major compaction with periodic filtering...
* Adress lazy_static, special cfs and range check
* Clean up a bit and add comment
* Add comment
* More comments...
* Config code cleanup
* Add comment
* Use .conflicts_with()
* Nullify unneeded delete_range ops for special CFs
* Some clean ups
* Clarify the locking intention
* Ensure special CFs' consistency with PurgeType::CompactionFilter
* Fix comment
* Fix bad copy paste
* Fix various types...
* Don't use tuples
* Add a unit test for compaction_filter
* Fix typo...
* Remove flag and just use new behavior always
* Fix wrong condition negation...
* Doc. about no set_last_purged_slot in purge_slots
* Write a test and fix off-by-one bug....
* Apply suggestions from code review
Co-authored-by: Tyera Eulberg <teulberg@gmail.com>
* Follow up to github review suggestions
* Fix line-wrapping
* Fix conflict
Co-authored-by: Tyera Eulberg <teulberg@gmail.com>
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