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ESXi host values set using Virtual Storage Console for VMware vSphere

You can set timeouts and other values on the ESXi hosts using Virtual Storage Console for VMware vSphere to ensure best performance and successful failover. The values that Virtual Storage Console (VSC) sets are based on internal Lenovo testing.

You can set the following values on an ESXi host:

ESXi advanced configuration​

VMFS3.HardwareAcceleratedLocking
You should set this value to 1.
VMFS3.EnableBlockDelete
You should set this value to 0.

NFS settings​

Net.TcpipHeapSize
If you are using vSphere 6.0 or later, you should set this value to 32.
Net.TcpipHeapMax
If you are using vSphere 6.0 or later, you should set this value to 1536.
NFS.MaxVolumes
If you are using vSphere 6.0 or later, you should set this value to 256.
NFS41.MaxVolumes
If you are using vSphere 6.0 or later, you should set this value to 256.
NFS.MaxQueueDepth
If you are using the vSphere 6.0 or later version of ESXi host, then you should set this value to 128 or higher to avoid queuing bottlenecks.

For vSphere versions prior to 6.0, you should set this value to 64.

NFS.HeartbeatMaxFailures
You should set this value to 10 for all NFS configurations.
NFS.HeartbeatFrequency
You should set this value to 12 for all NFS configurations.
NFS.HeartbeatTimeout
You should set this value to 5 for all NFS configurations.

FC/FCoE settings​

Path selection policy
You should set this value to RR (round robin) when FC paths with ALUA are used.

You should set this value to FIXED for all other configurations.

Setting this value to RR helps to provide load balancing across all of the active/optimized paths. The value FIXED is used for older, non-ALUA configurations and helps to prevent proxy I/O.

Disk.QFullSampleSize
You should set this value to 32 for all configurations. Setting this value helps to prevent I/O errors.
Disk.QFullThreshold
You should set this value to 8 for all configurations. Setting this value helps prevent I/O errors.
Emulex FC HBA timeouts
Use the default value.
QLogic FC HBA timeouts
Use the default value.

iSCSI settings​

Path selection policy
You should set this value to RR for all iSCSI paths.

Setting this value to RR helps to provide load balancing across all of the active/optimized paths.

Disk.QFullSampleSize
You should set this value to 32 for all configurations. Setting this value helps to prevent I/O errors.
Disk.QFullThreshold
You should set this value to 8 for all configurations. Setting this value helps prevent I/O errors.