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https://issues.apache.org/jira/browse/HDFS-12954?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HDFS-12954 started by Chen Liang.
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> Ozone: Container : Add key versioning support-3
> -----------------------------------------------
>
> Key: HDFS-12954
> URL: https://issues.apache.org/jira/browse/HDFS-12954
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: ozone
> Affects Versions: HDFS-7240
> Reporter: Chen Liang
> Assignee: Chen Liang
> Attachments: HDFS-12954-HDFS-7240.001.patch
>
>
> A new version of a key is effectively overwriting some consecutive range of
> bytes in the entire key offset range. For each version, we need to keep
> exactly what the range is in order for the IO vector to work.
> Currently, since we only write from the start (offset = 0), so offset range
> of a version is only up to the key data size field when the version gets
> committed. But currently we only keep one single key data size variable.(see
> {{KeyManagerImpl#commitKey}}). We need to know the corresponding key data
> size for each version. This JIRA is to the tracking of offset range for each
> version.
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