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https://issues.apache.org/jira/browse/HADOOP-3414?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12598133#action_12598133
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Arun C Murthy commented on HADOOP-3414:
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bq. Is that something like what you have in mind?
Absolutely!
> Facility to query serializable types such as Writables for 'raw length'
> -----------------------------------------------------------------------
>
> Key: HADOOP-3414
> URL: https://issues.apache.org/jira/browse/HADOOP-3414
> Project: Hadoop Core
> Issue Type: Improvement
> Components: io
> Reporter: Arun C Murthy
>
> Currently we need to jump through hoops to get the 'raw length' of
> serializable types for e.g. SequenceFile.Writer.append needs to copy the
> key/value into a buffer and then check the buffer's size to figure the
> record/key/value lenghts. Obviously this can be improved to do away with the
> extra copy if we had types which could be queried for it's raw-length.
> Thoughts?
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