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Command Reference for Block

OceanStor Dorado V3 Series V300R002

This document is applicable to OceanStor Dorado3000 V3, Dorado5000 V3, Dorado6000 V3 and Dorado18000 V3. Based on the CLI provided by the DeviceManager, this document describes how to use various commands classified by functions and how to set the CLI and manage the storage system through these commands.
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show performance elink

show performance elink


The show performance elink command is used to query performance statistics on heterogeneous links. Run this command to analyze real-time performance statistics on heterogeneous links.


show performance elink { link_id=? | link_id_list=? }






ID of the heterogeneous link whose performance you want to query.

To obtain the value, run the "show remote_device elink" command.


ID list of heterogeneous links whose performance you want to query.

  • To obtain the value, run the "show remote_device elink" command.
  • Multiple IDs are separated by commas (,), or the ID range is separated by hyphens (-).
  • A maximum of 50 IDs can be queried.



Usage Guidelines

  • You will be prompted with optional performance statistics categories upon running this command. In this condition, typing a number or multiple numbers (separated by commas) for the selected categories and pressing "Enter" display the performance statistics for those categories.
  • Performance statistics will be updated in real time.
  • Typing "q" on the command line interface (CLI) exits the active performance statistics display.


Query write I/Os statistics on link "268435456".

admin:/>show performance elink link_id=268435465 
0.Queue Length                                            
2.Average Read I/O Size(KB)                               
3.Read Throughput(IOPS)(IO/s)                             
4.Average Write I/O Size(KB)                              
5.Write Throughput(IOPS)(IO/s)                            
6.Service Time(Excluding Queue Time)(ms)                  
7.Read Bandwidth(MB/s)                                    
8.Write Bandwidth(MB/s)                                   
9.Average IO Size(KB)                                     
10.% Read                                                 
11.% Write                                                
12.Max IOPS(IO/s)                                         
13.Failed IOs                                             
14.Failed IOs/sec                                         
15.Failed IO Ratio(%)                                     
16.Average I/O Latency(us)                                
17.Max. I/O Latency(us)                                   
18.Average Read I/O Latency(us)                           
19.Average Write I/O Latency(us)                          
20.Max. Bandwidth(MB/s)                                   
21.Bandwidth(MB/s) / Block Bandwidth(MB/s)                
22.The cumulative count of I/Os                           
23.The cumulative count of data transferred in Kbytes     
24.The cumulative count of all writes                     
25.The cumulative count of data written in Kbytes 
Input item(s) number separated by comma:24 
 The cumulative count of all writes : 0

System Response

The following table describes the parameter meanings.



Queue Length

Queue length.


Input/output operations per second.

Average Read I/O Size(KB)

Average read I/O size.

Read Throughput(IOPS)(IO/s)

Read operations per second.

Average Write I/O Size(KB)

Average write I/O size.

Write Throughput(IOPS)(IO/s)

Write operations per second.

Service Time(Excluding Queue Time)(ms)

Service time (excluding the queue time).

Read Bandwidth(MB/s)

Read bandwidth.

Write Bandwidth(MB/s)

Write bandwidth.

Average IO Size(KB)

Average I/O size.

% Read

Read ratio (%).

% Write

Write ratio (%).

Max IOPS(IO/s)

Maximum input/output operations per second.

Failed IOs

Failed I/Os.

Failed IOs/sec

Number of failed I/Os per second.

Failed IO Ratio(%)

Failed I/O Ratio (%).

Average I/O Latency(us)

Average I/O latency.

Max. I/O Latency(us)

Maximum I/O latency.

Average Read I/O Latency(us)

Average read I/O latency.

Average Write I/O Latency(us)

Average write I/O latency.

Max. Bandwidth(MB/s)

Maximum Bandwidth.

Bandwidth(MB/s) / Block Bandwidth(MB/s)


The cumulative count of I/Os

Cumulative count of I/Os.

The cumulative count of data transferred in Kbytes

Cumulative count of data transferred in KB.

The cumulative count of all writes

Cumulative count of all writes.

The cumulative count of data written in Kbytes

Cumulative count of data written in KB.

Updated: 2019-07-16

Document ID: EDOC1100049140

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