7.3. I/O Mode
7.3. I/O Mode I/O mode options can be configured with virt-manager during guest installation, or on an existing guest virtual machine by editing the guest XML configuration. Table 7.2. IO mode options IO Mode Option Description IO=native The default for Red Hat Virtualization (RHV) environments. This mode refers to kernel asynchronous I/O with direct I/O options. IO=threads The default are host user-mode based threads. IO=default The default in Red Hat Enterprise Linux 7 is threads mode. In virt-manager , the I/O mode can be specified under Virtual Disk . For information on using virt-manager to change the I/O mode, see Section 3.3, "Virtual Disk Performance Options" To configure the I/O mode in the guest XML, edit the io setting inside the driver tag, specifying native , threads , or default . For example, to set the I/O mode to threads : <disk type='file' device='disk'> <driver name='qemu' type='raw' io='threads'/>
<disk type='file' device='disk'> <driver name='qemu' type='raw' io='threads'/>