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From Andrew Wang <andrew.w...@cloudera.com>
Subject Re: Questions on HDFS-8880
Date Tue, 06 Oct 2015 18:29:30 GMT
If it's duplicate we should probably back it out, but taking a step back,
is the issue that there isn't good documentation about configuring Metrics2
/ FileSync? I see the API docs, but a user-focused guide on how to
configure Metrics2 would probably be a welcome addition.

HBase has a blog at https://blogs.apache.org/hbase/ this could also be good
content for a blog post.


On Tue, Oct 6, 2015 at 11:12 AM, Allen Wittenauer <aw@altiscale.com> wrote:

> Folks,
>         I’ve been looking over HDFS-8880 and it’s various follow-on
> JIRAs.  The intentions are good, but the implementation is
> mostly/effectively a duplicate of the FileSink that’s already part of the
> Hadoop metrics subsystem. (which therefore means it works with all daemons,
> out of the box already).  Reading through HDFS-9114, it’s pretty obvious
> now that users are going to get *very* confused as just what happens when
> they set the “hadoop.metrics.log.file” property.  It’s opening a pandora’s
> box of work, since that property only partially works with one sub-project,
> will show up on the command line of every daemon, and isn’t documented...
>         I’d like to see this series of patches reverted (they haven’t
> shipped yet, so now is the time!) and effort placed into updating the
> metrics2 FileSink to have whatever functionality is missing.
>         Thoughts?

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