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https://issues.apache.org/jira/browse/HDFS-7165?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14178706#comment-14178706
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Andrew Wang commented on HDFS-7165:
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It's okay to make whitespace changes if they're nearby changes you're already
making. I also make an exception if it's something egregious like the
indentation being off. We generally avoid doing this unnecessarily to avoid
messing up git blame and to avoid making the patch bigger than it needs to be.
Thinking about this case a bit more though, I guess since it's just deleting
lines it won't mess up a git blame, so we can keep it.
> Separate block metrics for files with replication count 1
> ---------------------------------------------------------
>
> Key: HDFS-7165
> URL: https://issues.apache.org/jira/browse/HDFS-7165
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Andrew Wang
> Assignee: Zhe Zhang
> Attachments: HDFS-7165-20141003-v1.patch,
> HDFS-7165-20141009-v1.patch, HDFS-7165-20141010-v1.patch,
> HDFS-7165-20141015-v1.patch
>
>
> We see a lot of escalations because someone has written teragen output with a
> replication factor of 1, a DN goes down, and a bunch of missing blocks show
> up. These are normally false positives, since teragen output is disposable,
> and generally speaking, users should understand this is true for all repl=1
> files.
> It'd be nice to be able to separate out these repl=1 missing blocks from
> missing blocks with higher replication factors..
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