HDFS - Home
Metrics that show operating status for HDFS.
![[Note]](../common/images/admon/note.png) | 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. |
| 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 STATUS | Add 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). |