If using a 25-Gbps Ethernet channel board does not achieve the level of I/O performance you expected, performance might improve by configuring the following parameters in hosts.
When you configure the parameters, the set values are applied to I/O of all devices that are connected to your host. If the host is connected to devices other than a 25-Gbps Ethernet channel board, make sure that the new values of the parameters do not affect I/O of other devices before you set the values.
If you run a virtual machine on VMware ESXi, configure the parameters in the OS of the virtual machine.
| Parameter | Value to be set |
|---|---|
| MTU | 9000 |
| Socket buffer size |
The value to be set differs depending on the OS of your host.
|
| Immediate data |
The value to be set differs depending on the OS of your host.
|
| Maximum receive data segment length | 262144 or greater |
| First burst length | 262144 or greater |
| Maximum burst length | 262144 or greater |
| Header digest |
The value to be set differs depending on the OS of your host.
|
| Data digest |
The value to be set differs depending on the OS of your host.
|