qos statistics volume latency show

Display latency breakdown data per volume

Availability: This command is available to cluster administrators at the admin privilege level.

Description

The qos statistics volume latency show command displays the average latencies for volumes on Data ONTAP subsystems.

The command displays the following data:

The results displayed per iteration are sorted by the total latency field. Each iteration starts with a row that displays the average latency, in microseconds (us) or milliseconds (ms) observed across all volumes.

Parameters

[-node {<nodename>|local}] - Node
Selects the volumes that match this parameter value. If you do not specify this parameter, the command displays data for the entire cluster.
{ [-rows <integer>] - Number of Rows in the Output
Specifies the number of busiest QoS policy groups to display. The default setting is 10. The allowed range of values is 1 to 20.
| -vserver <vserver name> - Vserver Name
Specifies the Vserver to which the volume belongs.
-volume <volume name>} - Volume Name
Selects the latency data that match this parameter value. Enter a complete volume name or press the <Tab> key to complete the name. Wildcard query characters are not supported.
[-iterations <integer>] - Number of Iterations
Specifies the number of times that the command refreshes the display with updated data before terminating. If you do not specify this parameter, the command iterates until interrupted by Ctrl-C.
[-refresh-display {true|false}] - Toggle Screen Refresh Between Each Iteration
Specifies the display style. If true, the command clears the display after each data iteration. If false, the command displays each data iteration below the previous one. The default is false.
[-show-flexgroup-as-constituents {true|false}] - Display Flexgroups as Constituents
If the parameter is specified and if the value is true, it will display data for FlexVols and Flexgroup Constituents. Otherwise it will display data for FlexVols and Flexgroups.

Examples

    cluster1::> qos statistics volume latency show -iterations 100 -rows 3
Workload            ID  Latency    Network  Cluster       Data     Disk  Qos Max    Qos Min      NVRAM      Cloud  FlexCache    SM Sync         VA
--------------- ------ --------   -------- --------   -------- -------- -------- ---------- ---------- ---------- ---------- ---------- ----------
-total-                110.35ms   110.02ms      0ms   327.00us      0ms      0ms        0ms        0ms        0ms        0ms        0ms        0ms
vs1vol0            111 167.82ms   167.22ms      0ms   603.00us      0ms      0ms        0ms        0ms        0ms        0ms        0ms        0ms
vol1              1234 117.76ms   117.56ms      0ms   191.00us      0ms      0ms        0ms        0ms        0ms        0ms        0ms        0ms
vol2               999  44.24ms    44.05ms      0ms   190.00us      0ms      0ms        0ms        0ms        0ms        0ms        0ms        0ms
-total-             -   38.89ms    38.63ms      0ms   256.00us      0ms      0ms        0ms        0ms        0ms        0ms        0ms        0ms
vol2               999  64.47ms    64.20ms      0ms   266.00us      0ms      0ms        0ms        0ms        0ms        0ms        0ms        0ms
vol1              1234  27.28ms    27.03ms      0ms   253.00us      0ms      0ms        0ms        0ms        0ms        0ms        0ms        0ms
vs1vol0            111  23.72ms    23.47ms      0ms   249.00us      0ms      0ms        0ms        0ms        0ms        0ms        0ms        0ms
-total-              - 409.81ms   409.65ms      0ms   169.00us      0ms      0ms        0ms        0ms        0ms        0ms        0ms        0ms
vol1              1234 816.92ms   816.80ms      0ms   120.00us      0ms      0ms        0ms        0ms        0ms        0ms        0ms        0ms
vol2               999 407.88ms   407.66ms      0ms   219.00us      0ms      0ms        0ms        0ms        0ms        0ms        0ms        0ms
vs1vol0            111   3.68ms     3.49ms      0ms   193.00us      0ms      0ms        0ms        0ms        0ms        0ms        0ms        0ms
    
The example above displays latencies for the 3 volumes with the highest latencies and it refreshes the display 100 times before terminating.
    cluster1::> qos statistics volume latency show -vserver vs0 -volume vs0_vol0 -iterations 100
Workload            ID    Latency    Network    Cluster       Data       Disk    Qos Max    Qos Min      NVRAM      Cloud  FlexCache    SM Sync         VA
--------------- ------ ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------
-total-              -   455.00us   158.00us        0ms   297.00us        0ms        0ms        0ms        0ms        0ms        0ms        0ms        0ms
vs0_vol0-wid1..  15658   428.00us   155.00us        0ms   273.00us        0ms        0ms        0ms        0ms        0ms        0ms        0ms        0ms
-total-              -   337.00us   130.00us        0ms   207.00us        0ms        0ms        0ms        0ms        0ms        0ms        0ms        0ms
vs0_vol0-wid1..  15658   316.00us   128.00us        0ms   188.00us        0ms        0ms        0ms        0ms        0ms        0ms        0ms        0ms
-total-              -   464.00us   132.00us        0ms   332.00us        0ms        0ms        0ms        0ms        0ms        0ms        0ms        0ms
vs0_vol0-wid1..  15658   471.00us   130.00us        0ms   341.00us        0ms        0ms        0ms        0ms        0ms        0ms        0ms        0ms
-total-              -   321.00us   138.00us        0ms   183.00us        0ms        0ms        0ms        0ms        0ms        0ms        0ms        0ms
vs0_vol0-wid1..  15658   302.00us   137.00us        0ms   165.00us        0ms        0ms        0ms        0ms        0ms        0ms        0ms        0ms
-total-              -   418.00us   142.00us        0ms   276.00us        0ms        0ms        0ms        0ms        0ms        0ms        0ms        0ms
vs0_vol0-wid1..  15658   424.00us   143.00us        0ms   281.00us        0ms        0ms        0ms        0ms        0ms        0ms        0ms        0ms