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[HDFS-5350] Name Node should report fsimage transfer time as a metric - HDFS - [issue]
...If the (Secondary) Name Node reported fsimage transfer times (perhaps the last ten of them), monitoring tools could detect slowdowns that might jeopardize cluster stability....
http://issues.apache.org/jira/browse/HDFS-5350    Author: Rob Weltman, 2014-01-28, 23:36
[HDFS-5220] Expose group resolution time as metric - HDFS - [issue]
...It would help detect issues with authentication configuration and with overloading an authentication source if the name node exposed the time taken for group resolution as a metric....
http://issues.apache.org/jira/browse/HDFS-5220    Author: Rob Weltman, 2014-01-07, 14:43
[HDFS-5351] Name Nodes should shut down if no image directories - HDFS - [issue]
...If, for whatever reason, there are no image directories to write to, all Name Node instances should shut down....
http://issues.apache.org/jira/browse/HDFS-5351    Author: Rob Weltman, 2013-10-14, 15:59
Re: Introducing Parquet: efficient columnar storage for Hadoop. - HDFS - [mail # user]
...On 3/13/13 10:40 AM, Abhishek Kashyap wrote:  Trevni is part of the Apache open source community and people are free to continue using and contributing to it if they see it as a better ...
   Author: Rob Weltman, 2013-03-16, 02:43
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