sodonnel commented on PR #3781:
URL: https://github.com/apache/ozone/pull/3781#issuecomment-1263753876
The changes look good, but I think it would be much more useful if we could
track metric at the decommissioning node level too. Ie:
```
TotalTrackedContainersUnderReplicatedForHostname = xyz
```
I had a look at the ReplicationManagerMetric class, and in there, is an
example of how to form a metric "on the fly" using:
```
private static final MetricsInfo INFLIGHT_REPLICATION = Interns.info(
"InflightReplication",
"Tracked inflight container replication requests.");
```
I think it should be possible store the counts per hostname in a map or
list, and then when the metrics are snapshot, form dynamic metric names for the
host level under / over / unhealthy container counts.
Also keep the aggregate metrics. These host level metrics would let people
see if one host is stuck or if all are making progress etc.
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