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https://issues.apache.org/jira/browse/HDFS-8392?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14542952#comment-14542952
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Joe Pallas commented on HDFS-8392:
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The current Ozone Architecture document seems to say that storage would simply
use different block pools, so it isn't clear what motivates this. The datanode
has the notion of a single dataset pretty firmly at present, and it isn't clear
how multiple datasets might share the same volumes (if that is the intent).
Could you elaborate on what problems this would be trying to solve?
> DataNode support for multiple datasets
> --------------------------------------
>
> Key: HDFS-8392
> URL: https://issues.apache.org/jira/browse/HDFS-8392
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode
> Reporter: Arpit Agarwal
> Assignee: Arpit Agarwal
>
> 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.
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