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https://issues.apache.org/jira/browse/HDFS-962?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13178321#comment-13178321
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Tsz Wo (Nicholas), SZE commented on HDFS-962:
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@Harsh, the test should verify if the patch is working.
It makes sense to check different values of packets and their impact but it can
be done separately. You made a good point.
> Make DFSOutputStream MAX_PACKETS configurable
> ---------------------------------------------
>
> Key: HDFS-962
> URL: https://issues.apache.org/jira/browse/HDFS-962
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: hdfs client
> Affects Versions: 0.22.0
> Reporter: Todd Lipcon
> Assignee: Justin Joseph
> Priority: Minor
> Attachments: HDFS-962.1.patch, HDFS-962.patch
>
>
> HDFS-959 suggests that the MAX_PACKETS variable (which determines how many
> outstanding data packets the DFSOutputStream will permit) may have an impact
> on performance. If so, we should make it configurable to trade off between
> memory and performance. I think it ought to be a secret/undocumented config
> for now - this will make it easier to benchmark without confusing users.
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