[AMBARI-15448] Report AMS / Grafana Per Disk Metrics and other changes

• Type: Task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.2.2
• Fix Version/s: 2.2.2
• Component/s: ambari-metrics
• Assignee: Siddharth Wagle
• Reporter: Siddharth Wagle
• Created: 16/Mar/16 22:17
• Updated: 17/Mar/16 11:01
• Resolved: 17/Mar/16 06:33

Description

We need to collect and expose per-disk metrics from AMS for iostats counters.
We can sort the disk names alphabetically, and name the metrics like _1, _2, etc.

Plus from psutils:
busy_time: (Linux, FreeBSD) time spent doing actual I/Os (in milliseconds)
read_merged_count (Linux): number of merged reads (see iostat doc)
write_merged_count (Linux): number of merged writes (see iostats doc)

Additional fixes:

• Combined_disk_total metric seems to be wrong : it is a sum() of all disk percentages from different disks
• Missing ATS and JHS metrics due to wrong config item in hadoop-metrics2.properties file
• Report number of disks

Issue Links

• links to: Review board