2.5.1. HDFS - Home - Hortonworks Data Platform

Metrics that show operating status for HDFS.

	Note
	In NameNode HA setup, this metric, and all the following metrics, include metrics collected from both the active and standby NameNode.

Row	Metrics	Description
NUMBER OF FILES UNDER CONSTRUCTION & RPC CLIENT CONNECTIONS	Number of Files Under Construction	Number of HDFS files that are still being written.
	RPC Client Connections	Number of open RPC connections from clients on NameNode(s).
TOTAL FILE OPERATIONS & CAPACITY USED	Total File Operations	Total number of operations on HDFS files, including file creation/deletion/rename/truncation, directory/file/block information retrieval, and snapshot related operations.
TOTAL FILE OPERATIONS & CAPACITY USED	Capacity Used	"CapacityTotalGB" shows total HDFS storage capacity, in GB. "CapacityUsedGB" indicates total used HDFS storage capacity, in GB.
RPC CLIENT PORT SLOW CALLS & HDFS TOTAL LOAD	RPC Client Port Slow Calls	Number of slow RPC requests on NameNode. A "slow" RPC request is one that takes more time to complete than 99.7% of other requests.
RPC CLIENT PORT SLOW CALLS & HDFS TOTAL LOAD	HDFS Total Load	Total number of connections on all the DataNodes sending/receiving data.
ADD BLOCK STATUS	Add Block Time	The average time (in ms) serving addBlock RPC request on NameNode(s).
ADD BLOCK STATUS	Add Block Num Ops	The rate of addBlock RPC requests on NameNode(s).