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Host and cluster settings

76 Dell EMC SC Series: Best Practices with VMware vSphere | 2060-M-BP-V

D Host and cluster settings

This section summarizes the host settings for each of the storage protocols. At the time of this writing, these

settings were valid for vSphere 7.x running on SCOS 6.6 and later. For each setting, see the referenced

section number to determine if the setting is applicable for your environment.

D.1 Recommended settings

Apply these settings to each of the ESXi hosts:

• Fibre Channel: QLogic driver module settings for queue depth and controller failover (section 4.2.1)

esxcli system module parameters set -m qlnativefc -p "ql2xmaxqdepth=255

ql2xloginretrycount=60 qlport_down_retry=60"

• Fibre Channel: Emulex driver module settings for queue depth and controller failover (section 4.2.1)

esxcli system module parameters set -m lpfc820 -p "lpfc_devloss_tmo=60

lpfc_lun_queue_depth=254"

• All protocols: Setting round robin as the default path selection policy (section 6.9.1.1)

esxcli storage nmp satp rule add -s VMW_SATP_ALUA -V COMPELNT -P

VMW_PSP_RR -o disable_action_OnRetryErrors -e "Dell EMC SC Series Claim

Rule"

• SAS: Configuring the recommended module parameters for the SAS driver (section 4.2.3)

esxcli system module parameters set -p issue_scsi_cmd_to_bringup_drive=0

-m lsi_msgpt3

• FCoE: Setting the ALUA module default for FCoE volumes

esxcli storage nmp satp rule add -R fcoe -s VMW_SATP_ALUA

• iSCSI: Setting ARP redirect for hardware iSCSI adapters (section 3)

esxcli iscsi physicalnetworkportal param set --option ArpRedirect –v=1 -A

vmhbaXX

• iSCSI: Software iSCSI Queue Depth (section 4.2.2)

esxcli system module parameters set -m iscsi_vmk -p iscsivmk_LunQDepth=255

• iSCSI: Software iSCSI login timeout (section 4.2.2)

esxcli iscsi adapter param set –A=vmhbaXX –k=LoginTimeout –v=5

• iSCSI: Disable Delayed ACK (section 3)

esxcli iscsi adapter param set -A vmhbaXX -k DelayedAck -v false

• All protocols: HA Cluster Settings (section 4.3)

esxcli system settings kernel set -s terminateVMonPDL -v TRUE