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https://issues.apache.org/jira/browse/HDDS-16044?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ethan Rose updated HDDS-16044:
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Summary: SCM should forward Datanode's current version to clients for read
and write operations (was: Do not use the unified versioning framework until
ZDU is finalized)
> SCM should forward Datanode's current version to clients for read and write
> operations
> --------------------------------------------------------------------------------------
>
> Key: HDDS-16044
> URL: https://issues.apache.org/jira/browse/HDDS-16044
> Project: Apache Ozone
> Issue Type: Improvement
> Reporter: Ethan Rose
> Assignee: Ethan Rose
> Priority: Major
>
> ZDU is the first version that supports the unified versioning framework,
> where network and disk compatibility are tracked with the same version.
> Therefore, we cannot use this framework before ZDU is finalized. The existing
> {{VersionManager}} already handles this for disk compatibility. It will read
> from the old layout feature enums until ZDU is finalized. We need similar
> handling for the component version sent over the network to clients. We
> cannot send the unified version framework's apparent version to clients until
> ZDU is finalized, otherwise we may be sending them a layout feature when they
> are expecting a component version. When ZDU is pre-finalized, we must send
> the last component version before ZDU to clients. Finalizing ZDU moves both
> version systems ahead to the unified one that starts with ZDU, where one
> apparent version can be shared over both disk and network.
> HDDS-15641 will handle this for SCM/Datanodes on the write path. This Jira
> will handle it for the remaining cases on the HDDS read path and OM
> {{getServiceInfo}} call.
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