Dell PowerStore 5200T EMC PowerStore Host Configuration Guide - Page 41

Multipathing Software Configuration, Configuring Native Multipathing (NMP) with SCSI

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● vCenter Concurrent Clones (config.vpxd.ResourceManager.maxCostPerHost) - The maximum number of concurrent full clone operations allowed (the default value is 8). For details, see VMware vSphere documentation. Multipathing Software Configuration Configuring Native Multipathing (NMP) with SCSI PowerStore with iSCSI or FC supports the Native Multipathing Plugin (NMP). This section describes the procedure that is required for configuring native multipathing for PowerStore volumes. NOTE: Configuring native multipathing for PowerStore volumes applies only to iSCSI or FC, and is not relevant for NVMe-oF. For best performance, follow these recommendations: ● Set the NMP Round Robin path selection policy on PowerStore volumes that are presented to the ESXi host. ● 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 method 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 in this method 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 method (unless they are unmapped from the host). NOTE: With ESXi 6.7 hosts that are connected to PowerStore, it is recommended to disable action_OnRetryErrors. For details on this ESXi parameter, see VMware Knowledge Article 67006 (Active/Passive or ALUA based...). NOTE: Using this method does not impact any non-PowerStore volume that is presented to the ESXi 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 -o disable_action_OnRetryErrors NOTE: Use the disable_action_OnRetryErrors parameter only with ESXi 6.7 hosts. This command also sets the NMP Round Robin path switching frequency for newly defined PowerStore volumes to switch every I/O. Host Configuration for VMware vSphere ESXi 41

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●
vCenter Concurrent Clones (config.vpxd.ResourceManager.maxCostPerHost) - The maximum number of concurrent full
clone operations allowed (the default value is 8). For details, see VMware vSphere documentation.
Multipathing Software Configuration
Configuring Native Multipathing (NMP) with SCSI
PowerStore with iSCSI or FC supports the Native Multipathing Plugin (NMP).
This section describes the procedure that is required for configuring native multipathing for PowerStore volumes.
NOTE:
Configuring native multipathing for PowerStore volumes applies only to iSCSI or FC, and is not relevant for
NVMe-oF.
For best performance, follow these recommendations:
●
Set the NMP Round Robin path selection policy on PowerStore volumes that are presented to the ESXi host.
●
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 method 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 in this method 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 method (unless they are unmapped from the host).
NOTE:
With ESXi 6.7 hosts that are connected to PowerStore, it is recommended to disable
action_OnRetryErrors
.
For details on this ESXi parameter, see
VMware Knowledge Article 67006 (Active/Passive or ALUA based...)
.
NOTE:
Using this method does not impact any non-PowerStore volume that is presented to the ESXi 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 -o disable_action_OnRetryErrors
NOTE:
Use the
disable_action_OnRetryErrors
parameter only with ESXi 6.7 hosts.
This command also sets the NMP Round Robin path switching frequency for newly defined PowerStore volumes to switch
every I/O.
Host Configuration for VMware vSphere ESXi
41