[jira] [Created] (HDFS-12954) Ozone: Container : Add key versioning support-3

["Chen Liang (JIRA)" <ji...@apache.org>]

Chen Liang created HDFS-12954:
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             Summary: 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


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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