David F. Quiroga created AMBARI-24123:
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Summary: Grafana System-Servers Dashboard Disk IO/IOPS shows
negative values
Key: AMBARI-24123
URL: https://issues.apache.org/jira/browse/AMBARI-24123
Project: Ambari
Issue Type: Bug
Components: ambari-metrics
Affects Versions: 2.6.2
Environment: HDP 2.6.4.0-91
Ambari 2.6.2.0
SLES 12
Side note we did not observe this in HDP 2.5.3, Ambari 2.5.2
Reporter: David F. Quiroga
Attachments: disk_stat_2hr.jpg, disk_stat_6hr.jpg
Grafana > System-Servers Dashboard
Charts > Disk IO - Read Bytes, Write Bytes, Disk IOPS - Read Count, Write Count
All display negative values for one or more hosts when viewed over a large time
period (6+ hrs)
Attached screenshots are for single host. 6hr shows negative values, but when
"zoom-in" on same time period (2hr) there are no negative values.
Therefore suspects it relates to aggregation of metrics rather than collection
itself.
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