hadoop-common-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Aaron Kimball (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6323) Serialization should provide comparators
Date Thu, 10 Dec 2009 19:06:18 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6323?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12788847#action_12788847

Aaron Kimball commented on HADOOP-6323:

With Writable serialization, yes, you've always had to pre-declare the datatypes for each
of the four key/value types emitted during a job dataflow. (The input types were implicit
from the InputFormat/RecordReader.)

I don't think it's necessary to dynamically determine the schema for emitted data during jobs
in Avro either. I think if it were, someone would have already asked for some sort of "DelayedWritable"
notion to be integrated in MapReduce already -- which I don't think we've seen. It might be
nice to support this eventually, but let's wait for demand.

> Serialization should provide comparators
> ----------------------------------------
>                 Key: HADOOP-6323
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6323
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: io
>            Reporter: Doug Cutting
>            Assignee: Aaron Kimball
>         Attachments: HADOOP-6323.2.patch, HADOOP-6323.3.patch, HADOOP-6323.4.patch, HADOOP-6323.5.patch,
HADOOP-6323.6.patch, HADOOP-6323.patch
> The Serialization interface should permit one to create raw comparators.

This message is automatically generated by JIRA.
You can reply to this email to add a comment to the issue online.

View raw message