Andrew Wang created HADOOP-10120: ------------------------------------ Summary: Additional sliding window metrics Key: HADOOP-10120 URL: https://issues.apache.org/jira/browse/HADOOP-10120 Project: Hadoop Common Issue Type: New Feature Components: metrics Affects Versions: 2.2.0 Reporter: Andrew Wang Assignee: Andrew Wang
For HDFS-5350 we'd like to report the last few fsimage transfer times as a health metric. This would mean (for example) a sliding window of the last 10 transfer times, when it was last updated, the total count. It'd be nice to have a metrics class that did this. It'd also be interesting to have some kind of time-based sliding window for statistics like counts and averages. This would let us answer questions like "how many RPCs happened in the last 10s? minute? 5 minutes? 10 minutes?". Commutative metrics like counts and averages are easy to aggregate in this fashion. -- This message was sent by Atlassian JIRA (v6.1#6144)