e3f953a863
Summary: Does what it says on the can: the patch adds a hash map to `VersionStorageInfo` that maps file numbers to file locations, i.e. (level, position in level) pairs. This will enable stricter consistency checks in `VersionBuilder`. The patch also fixes all the unit tests that used duplicate file numbers in a version (which would trigger an assertion with the new code). Pull Request resolved: https://github.com/facebook/rocksdb/pull/6862 Test Plan: `make check` `make whitebox_crash_test` Reviewed By: riversand963 Differential Revision: D21670446 Pulled By: ltamasi fbshipit-source-id: 2eac249945cf33d8fb8597b26bfff5221e1a861a