Dell PowerStore 1200T EMC PowerStore Host Configuration Guide - Page 24

Host Configuration for VMware vSphere ESXi, Path switching: Switch for every I/O.

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Validation ensure that the following are set per the default OS setting: ● LUN and HBA queue depth ● HBA timeout ESXi configuration: Disk.DiskMaxIOSize = 1024 NOTE: Mandatory for ESXi versions earlier than 7.0, unless the ESXi version is not exposed to the issue covered in VMware Knowledge Article 2137402 (Virtual machines using EFI firmware fails...). Impact Stability & Performance ESXi configuration: Keep the UNMAP priority for the host at the lowest possible value (default value for ESXi 6.5). Stability & Performance Specify ESXi as the operating system Serviceability for each defined host. Path selection policy for SCSI: VMW_PSP_RR Stability & Performance Path selection policy for NVMe: LB- Performance IOPS Alignment: Guest OS virtual machines Storage efficiency & should be aligned. Performance iSCSI configuration: Configure endto-end Jumbo Frames. Performance iSCSI configuration: Disable Delayed Stability ACK on ESXi. iSCSI configuration: Adjust LoginTimeOut to 30. Stability iSCSI configuration: Adjust NoopInterval to 5. Stability Path switching: Switch for every I/O. Performance Virtual Disk Provisioning: Use thin provisioned virtual disks. Virtual machine configuration: Configure virtual machines with Paravirtualized SCSI controllers. RDM volumes: In Guest OS, span RDM volumes used by the virtual machine across SCSI controllers. Performance Stability & Performance Performance Severity Refer to Section Mandatory with ESXi versions earlier than 7.0. Not required with ESXi version 7.0 or later. Setting Maximum I/O Mandatory Mandatory Mandatory Recommended Warning Recommended Recommended Recommended Recommended Recommended Recommended Recommended Recommended Confirming UNMAP Priority Presenting PowerStore Volumes to the ESXi Host Configuring vSphere Native Multipathing Configuring High Performance Multipathing (HPP) with NVMe Disk Formatting Jumbo Frames Delayed ACK Login Timeout No-Op Interval Configuring vSphere Native Multipathing Virtual Machine Formatting VMware Paravirtual SCSI controllers Virtual Machine Guest OS Settings NOTE: For information about virtualization and Virtual Volumes, see the following white papers: ● Dell EMC PowerStore Virtualization Infrastructure Guide at https://dell.com/support ● Dell PowerStore: VMware vSphere Best Practices NOTE: As noted in Dell EMC Knowledge Article 000126731 (PowerStore - Best practices for VMFS datastores...), when using vSphere v6.7 there is a known issue relating to VMFS deadlock. To resolve, install the latest vSphere version 24 Host Configuration for VMware vSphere ESXi

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Validation
Impact
Severity
Refer to Section
ensure that the following are set per
the default OS setting:
●
LUN and HBA queue depth
●
HBA timeout
ESXi configuration:
Disk.DiskMaxIOSize
= 1024
NOTE:
Mandatory for ESXi
versions earlier than 7.0, unless
the ESXi version is not
exposed to the issue covered
in
VMware Knowledge Article
2137402 (Virtual machines using
EFI firmware fails...)
.
Stability & Performance
Mandatory with ESXi
versions earlier than 7.0.
Not required with ESXi
version 7.0 or later.
Setting Maximum I/O
ESXi configuration: Keep the UNMAP
priority for the host at the lowest
possible value (default value for ESXi
6.5).
Stability & Performance
Mandatory
Confirming UNMAP Priority
Specify ESXi as the operating system
for each defined host.
Serviceability
Mandatory
Presenting PowerStore
Volumes to the ESXi Host
Path selection policy for SCSI:
VMW_PSP_RR
Stability & Performance
Mandatory
Configuring vSphere Native
Multipathing
Path selection policy for NVMe:
LB-
IOPS
Performance
Recommended
Configuring High
Performance Multipathing
(HPP) with NVMe
Alignment: Guest OS virtual machines
should be aligned.
Storage efficiency &
Performance
Warning
Disk Formatting
iSCSI configuration: Configure end-
to-end Jumbo Frames.
Performance
Recommended
Jumbo Frames
iSCSI configuration: Disable Delayed
ACK on ESXi.
Stability
Recommended
Delayed ACK
iSCSI configuration: Adjust
LoginTimeOut
to 30.
Stability
Recommended
Login Timeout
iSCSI configuration: Adjust
NoopInterval
to 5.
Stability
Recommended
No-Op Interval
Path switching: Switch for every I/O.
Performance
Recommended
Configuring vSphere Native
Multipathing
Virtual Disk Provisioning: Use thin
provisioned virtual disks.
Performance
Recommended
Virtual Machine Formatting
Virtual machine configuration:
Configure virtual machines with
Paravirtualized SCSI controllers.
Stability & Performance
Recommended
VMware Paravirtual SCSI
controllers
RDM volumes: In Guest OS, span
RDM volumes used by the virtual
machine across SCSI controllers.
Performance
Recommended
Virtual Machine Guest OS
Settings
NOTE:
For information about virtualization and Virtual Volumes, see the following white papers:
●
Dell EMC PowerStore Virtualization Infrastructure Guide
at
https://dell.com/support
●
Dell PowerStore: VMware vSphere Best Practices
NOTE:
As noted in
Dell EMC Knowledge Article 000126731 (PowerStore - Best practices for VMFS datastores...)
, when
using vSphere v6.7 there is a known issue relating to VMFS deadlock. To resolve, install the latest vSphere version
24
Host Configuration for VMware vSphere ESXi