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From "Haohui Mai (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-5847) Consolidate INodeReference into a separate section
Date Wed, 29 Jan 2014 18:54:09 GMT
Haohui Mai created HDFS-5847:

             Summary: Consolidate INodeReference into a separate section
                 Key: HDFS-5847
                 URL: https://issues.apache.org/jira/browse/HDFS-5847
             Project: Hadoop HDFS
          Issue Type: Sub-task
    Affects Versions: HDFS-5698 (FSImage in protobuf)
            Reporter: Haohui Mai
            Assignee: Jing Zhao

Currently each INodeDirectorySection.Entry contains variable numbers of INodeReference entries.
The INodeReference entries are inlined, therefore it is difficult to quickly navigate through
a INodeDirectorySection.Entry. Skipping through a INodeDirectorySection.Entry without parsing
is essential to parse these entries in parallel.

This jira proposes to consolidate INodeReferences into a section and give each of them an
ID. The INodeDirectorySection.Entry can store the list of the IDs as a repeated field. That
way we can leverage the existing code in protobuf to quickly skip through a INodeDirectorySection.Entry.

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