Hi all,
I am trying to monitor the resource usage of a cluster by pulling the
metrics from the rest API of Ambari (Version 2.4.2.0). I am sending
request with the following path:
http://ambari-server:8080/api/v1/clusters/test/hosts?fields=Hosts/last_heartbeat_time,metrics
There are few metrics that are really hard to understand. For instance,
the metrics of the disk:
"disk" : {
"disk_free" : 3278.83,
"disk_total" : 4948.57,
"read_bytes" : 5.0036226048E10,
"read_count" : 197716.0,
"read_time" : 8.7998397E7,
"write_bytes" : 1.0003064832E10,
"write_count" : 822311.0,
"write_time" : 1.6088341E7
},
How should I interpret the read_time? Why the values take minutes to
change (I am pulling every 10 seconds) even if the host is under high disk
I/O? Is there a legend that explains the meaning of each one of the
metrics?
Thanks.
Best Regards,
Max
