Dell PowerStore 3000T EMC PowerStore Host Configuration Guide - Page 21

Configuring NMP Round Robin as the Default Pathing Policy for All PowerStore Volumes

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• Set the NMP Round Robin path switching frequency to PowerStore volumes from the default value (1000 I/O packets) to 1. These settings ensure optimal distribution and availability of load between I/O paths to the PowerStore storage. Configuring NMP Round Robin as the Default Pathing Policy for All PowerStore Volumes Follow this procedure to configure NMP Round Robin as the default pathing policy for all PowerStore volumes using the ESXi command line. About this task NOTE: As of VMware ESXi version 6.7, Patch Release ESXi670-201912001, the satp rule presented in this procedure is already integrated into the ESXi kernel. NOTE: Use this method when no PowerStore volume is presented to the host. PowerStore volumes already presented to the host are not affected by this procedure (unless they are unmapped from the host). Steps 1. Open an SSH session to the host as root. 2. Run the following command to configure the default pathing policy for newly defined PowerStore volumes to Round Robin with path switching after each I/O packet: esxcli storage nmp satp rule add -c tpgs_on -e "PowerStore" -M PowerStore -P VMW_PSP_RR -O iops=1 -s VMW_SATP_ALUA -t vendor -V DellEMC This command also sets the NMP Round Robin path switching frequency for newly defined PowerStore volumes to switch every I/O. Next steps NOTE: Using this method does not impact any non-PowerStore volume presented to the ESXi host. Configuring NMP Round Robin on a PowerStore Volume Already Presented to the ESXi Host Follow this procedure to configure NMP Round Robin on a PowerStore volume that is already presented to the ESXi host, using ESXi command line: About this task NOTE: Use this method only for PowerStore volumes already presented to the host. For volumes not yet presented to the host, refer to Configuring vSphere NMP Round Robin as the default pathing policy for all volumes. Steps 1. Open an SSH session to the host as root. 2. Run the following command to obtain the NAA of PowerStore LUNs presented to the ESXi host: #esxcli storage nmp path list | grep DellEMC -B1 The following example demonstrates issuing the esxcli storage nmp path list command to obtain the NAA of all PowerStore LUNs presented to the ESXi host: #esxcli storage nmp path list | grep DellEMC -B1 Device: naa.68ccf09800e8fa24ea37a1bc49d9f6b8 Device Display Name: DellEMC Fibre Channel Disk (naa.68ccf09800e8fa24ea37a1bc49d9f6b8) -Device: naa.68ccf098003a54f16d2eddc3217da922 Device Display Name: DellEMC Fibre Channel Disk (naa.68ccf098003a54f16d2eddc3217da922) -Device: naa.68ccf09000000000c9f6d1acda1e4567 Device Display Name: DellEMC Fibre Channel RAID Ctlr (naa.68ccf09000000000c9f6d1acda1e4567) -- Host Configuration for VMware vSphere ESXi 21

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Set the NMP Round Robin path switching frequency to PowerStore volumes from the default value (1000 I/O packets) to 1.
These settings ensure optimal distribution and availability of load between I/O paths to the PowerStore storage.
Configuring NMP Round Robin as the Default Pathing Policy for All
PowerStore Volumes
Follow this procedure to configure NMP Round Robin as the default pathing policy for all PowerStore volumes using the ESXi command
line.
About this task
NOTE:
As of VMware ESXi version 6.7, Patch Release ESXi670-201912001, the satp rule presented in this procedure is
already integrated into the ESXi kernel.
NOTE:
Use this method when no PowerStore volume is presented to the host. PowerStore volumes already presented to
the host are not affected by this procedure (unless they are unmapped from the host).
Steps
1.
Open an SSH session to the host as
root
.
2.
Run the following command to configure the default pathing policy for newly defined PowerStore volumes to Round Robin with path
switching after each I/O packet:
esxcli storage nmp satp rule add -c tpgs_on -e "PowerStore" -M PowerStore -P VMW_PSP_RR -O
iops=1 -s VMW_SATP_ALUA -t vendor -V DellEMC
This command also sets the NMP Round Robin path switching frequency for newly defined PowerStore volumes to switch every I/O.
Next steps
NOTE:
Using this method does not impact any non-PowerStore volume presented to the ESXi host.
Configuring NMP Round Robin on a PowerStore Volume Already
Presented to the ESXi Host
Follow this procedure to configure NMP Round Robin on a PowerStore volume that is already presented to the ESXi host, using ESXi
command line:
About this task
NOTE:
Use this method only for PowerStore volumes already presented to the host. For volumes not yet presented to
the host, refer to
Configuring vSphere NMP Round Robin as the default pathing policy for all volumes
.
Steps
1.
Open an SSH session to the host as
root
.
2.
Run the following command to obtain the NAA of PowerStore LUNs presented to the ESXi host:
#esxcli storage nmp path list | grep DellEMC -B1
The following example demonstrates issuing the
esxcli storage nmp path list
command to obtain the NAA of all
PowerStore LUNs presented to the ESXi host:
#esxcli storage nmp path list | grep DellEMC -B1
Device: naa.68ccf09800e8fa24ea37a1bc49d9f6b8
Device Display Name: DellEMC Fibre Channel Disk (naa.68ccf09800e8fa24ea37a1bc49d9f6b8)
--
Device: naa.68ccf098003a54f16d2eddc3217da922
Device Display Name: DellEMC Fibre Channel Disk (naa.68ccf098003a54f16d2eddc3217da922)
--
Device: naa.68ccf09000000000c9f6d1acda1e4567
Device Display Name: DellEMC Fibre Channel RAID Ctlr
(naa.68ccf09000000000c9f6d1acda1e4567)
--
Host Configuration for VMware vSphere ESXi
21