Dell EMC VxFlex Ready Node, User Manual

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Optimize ESXi
To improve I/O concurrency, users may increase the per device queue length value on
a per data store basis. Per device queue length is referred to as “No of outstanding
IOs with competing worlds” in the display output.
Use the following command to increase the queue length;
esxcli storage core device set -d <DEVICE_ID> -O <Outstanding IOs>
where,
<Outstanding IOs> can be a number ranging from 32-16384 (the default=32).
We recommend increasing queue length to 256.
Example:
esxcli storage core device set -d
eui.16bb852c56d3b93e3888003b00000000 -O 256
Optimize the SVM
Optimize the SVM
Procedure
1. Configure the CPU and memory assigned to the Storage Virtual Machine
(SVM).
l
In general, 8 vCPUs are sufficient, but this may vary in your environment. It
is recommended to increase vCPUs to 12 if CloudLink is installed. Note this
is only relevant if the CPU has 12 or more physical cores.
l
Cores per socket should be set to maximum so all vCPU will be allocated to a
single virtual socket.
2. From the Resources tab of the Virtual Machine Properties window, select
Reserve all guest memory (All locked).
The Virtual Machine Properties window is displayed:
VxFlex OS performance fine-tuning
Dell EMC VxFlex Ready Node AMS User Guide 123