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Dell PowerFlex Manager 4.6.x CLI Reference Guide

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query_all_device_latency_meters

Retrieve device latency meters for all the devices, or for devices in the specified protection domain.

NOTE: To query the devices in a specific SDS, use the query_device_latency_meters command.

Syntax

scli --query_all_device_latency_meters 
  [(--protection_domain_id <ID> | --protection_domain_name <NAME>)]
NOTE:If the background device scanner is enabled, several device read statistics are dramatically affected.

Example

scli --query_all_device_latency_meters --protection_domain_name pd10

Sample output

Protection Domain: fcc9af5500000000, Name: pd1 contains 4 SDS
Storage Pool: 3df1cd9600000000, Name: sp1 contains 8 devices
  SDS sds_idd_1:
    Device: /dev/sdb Average latency read: 836 write: 921 (microseconds)
    Device: /dev/sdc Average latency read: 755 write: 843 (microseconds)

  SDS sds_idd_2:
    Device: /dev/sdb Average latency read: 658 write: 815 (microseconds)
    Device: /dev/sdc Average latency read: 689 write: 732 (microseconds)

  SDS sds_idd_4:
    Device: /dev/sdb Average latency read: 842 write: 811 (microseconds)
    Device: /dev/sdc Average latency read: 852 write: 918 (microseconds)

  SDS sds_idd_5:
    Device: /dev/sdb Average latency read: 844 write: 698 (microseconds)
    Device: /dev/sdc Average latency read: 795 write: 801 (microseconds)

  Devices with maximal read latency:
    SDS: sds_idd_4 Device: /dev/sdc  Latency: 852 (microseconds)
    SDS: sds_idd_5 Device: /dev/sdb  Latency: 844 (microseconds)
    SDS: sds_idd_4 Device: /dev/sdb  Latency: 842 (microseconds)
  Devices with maximal write latency:
    SDS: sds_idd_1 Device: /dev/sdb  Latency: 921 (microseconds)
    SDS: sds_idd_4 Device: /dev/sdc  Latency: 918 (microseconds)
    SDS: sds_idd_1 Device: /dev/sdc  Latency: 843 (microseconds)

Protection Domain: fcc9af5600000001, Name: pd2 contains 1 SDS
Storage Pool: 3df1cd9700000001, Name: sp2 contains 1 devices
  SDS sds_idd_3:
    Device: /dev/sdb Average latency read: 0 write: 0 (microseconds)


Protection Domain: fcc9d66500000002, Name: rrr contains 0 SDS

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