| Block | Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. | code | html |
| DbDirectory | A DbDirectory is a Berkeley DB 4.3 based implementation of Directory . | code | html |
| DbIndexInput | Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. | code | html |
| DbIndexOutput | Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. | code | html |
| DbLock | This implementation of Lock is trivial as DbDirectory operations are managed by the Berkeley DB locking system. | code | html |
| File | Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. | code | html |