Configuring devices with the virtual server

The domain configuration-XML file specifies virtual devices that are defined along with the virtual server.

Before you begin

Ensure that the devices are prepared for the use of the virtual server.
Devices that can be attached to an already defined virtual server are configured in separate device configuration-XML files.

Procedure

Optional: To improve the performance of I/O operations on DASDs and SCSI disks, specify the number of I/O threads to be supplied for the virtual server.

iothreads element: <number-of-IOthreads>

(see <iothreads>)
Example:
```
<domain>
    ...
    <iothreads>1</iothreads>
    ...
</domain>
```
Specify a configuration-XML for each device.

Configuring devices describes how to specify a configuration-XML for a device.
For each device to be defined with the virtual server, place the configuration-XML as a child element of the devices element in the domain configuration-XML file.

iothreads element:	`<number-of-IOthreads>`

Example

<domain type="kvm">
    <iothreads>1</iothreads>
    ...
    <devices>
        ...
        <disk type="block" device="disk">
            <driver name="qemu" type="raw" cache="none" io="native" iothread="1"/>
            <source dev="/dev/mapper/36005076305ffc1ae00000000000020d3"/>
            <target dev="vda" bus="virtio"/>
        </disk>
        ...
    </devices>
</domain>