...
Replace
BlockManager
withFileSystem, replace
ReadableBlock
withFileReader, replace WritableBlock with FileWriter, and removed remove dependency on Env. Move some StorageBackend interface(upload, download, ...) to RemoteFileSystem.
- Rewrites Rewrite rowset write IO path, uses use FileSystem, FileWriter, FileReader related interface.
- Replace all Env, FileUtils related calls with FileSystem interface.
- Unify FileReader and FileWriter in the query layer with filesystem layer FileReader, FileWriter.