Apache Ambari Operations
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HDFS - Home

The HDFS - Home dashboard displays metrics that show operating status for HDFS.

[Note]Note

In a NameNode HA setup, metrics are collected from and displayed for both the active and the standby NameNode.

RowMetrics

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.

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.

HDFS Total Load

Total number of connections on all the DataNodes sending/receiving data.

ADD BLOCK STATUSAdd Block Time

The average time (in ms) serving addBlock RPC request on NameNode(s).

Add Block Num Ops

The rate of addBlock RPC requests on NameNode(s).