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HDFS, mail # dev - [VOTE] Merge HDFS-5698 Use protobuf to serialize / deserialize FSImage to trunk


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Re: [VOTE] Merge HDFS-5698 Use protobuf to serialize / deserialize FSImage to trunk
Chris Nauroth 2014-02-05, 20:47
+1

Thank you, Haohui Mai and Jing Zhao.  I'm definitely looking forward to
fewer metadata upgrades in the future.  :-)

Chris Nauroth
Hortonworks
http://hortonworks.com/

On Mon, Feb 3, 2014 at 10:49 PM, Akira AJISAKA
<[EMAIL PROTECTED]>wrote:

> +1 (non-binding).
>
> This feature is very good for the developers to reduce
> the tasks for supporting FSImage compatibility.
>
> Thanks,
> Akira
>
>
> (2014/01/31 7:37), Haohui Mai wrote:
>
>> Hello all,
>>
>> I would like to call a vote to merge of the new protobuf-based FSImage
>> into
>> trunk.
>>
>> The changes introduce a protobuf-based FSImage format into HDFS. It
>> separates the responsibility of serializing and reconstructing the
>> namespace in the NameNode using Google's Protocol Buffers
>> (protobuf). The new FSImage delegates much parts of the serialization /
>> deserialization logics to the protobuf side. It is also designed to
>> improve the supports for compatibility and interoperability.
>>
>> The development has been done in a separate branch:
>> https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-5698
>>
>> The design document is available at:
>> https://issues.apache.org/jira/secure/attachment/
>> 12626179/HDFS-5698-design.pdf
>>
>> The HDFS-5698 jira tracks the development of the feature.
>>
>> The feature changes no public APIs. The existing tests include both
>> unit tests and end-to-end tests. They have already covered this
>> feature.
>>
>> Once the feature is merged into trunk, we will continue to test and
>> fix any bugs that may be found on trunk.
>>
>> The bulk of the design and implementation was done by Jing Zhao,
>> Suresh Srinivas and me. Thanks Kihwal Lee, Todd Lipcon, Colin
>> Patrick McCabe, Chris Nauroth, and Daryn Sharp for providing feedback on
>> the jiras and in discussions.
>>
>> This vote runs for a week and closes on 2/6/2013 at 11:59 pm PT.
>>
>> Regards,
>> Haohui
>>
>>
>

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