Major Description
For HDFS-7240 we would like to share available DataNode storage across HDFS blocks and Ozone objects.
The DataNode already supports sharing available storage across multiple block pool IDs for the federation feature. However all federated block pools use the same dataset implementation i.e. FsDatasetImpl.
We can extend the DataNode to support multiple dataset implementations so the same storage space can be shared across one or more HDFS block pools and one or more Ozone block pools.