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154df5840d
In certain specific cases it might be beneficial to be able to control the metadata caching of storage image format drivers of a hypervisor. Introduce XML machinery to set the maximum size of the metadata cache which will be used by qemu's qcow2 driver. Signed-off-by: Peter Krempa <pkrempa@redhat.com> Reviewed-by: Ján Tomko <jtomko@redhat.com>
47 lines
1.5 KiB
XML
47 lines
1.5 KiB
XML
<domain type='qemu'>
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<name>QEMUGuest1</name>
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<uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
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<memory unit='KiB'>219100</memory>
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<currentMemory unit='KiB'>219100</currentMemory>
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<vcpu placement='static'>1</vcpu>
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<os>
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<type arch='i686' machine='pc'>hvm</type>
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<boot dev='hd'/>
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</os>
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<clock offset='utc'/>
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<on_poweroff>destroy</on_poweroff>
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<on_reboot>restart</on_reboot>
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<on_crash>destroy</on_crash>
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<devices>
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<emulator>/usr/bin/qemu-system-i386</emulator>
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<disk type='file' device='disk'>
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<driver name='qemu' type='qcow2' cache='none'>
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<metadata_cache>
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<max_size>12345</max_size>
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</metadata_cache>
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</driver>
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<source file='/tmp/QEMUGuest1.img'/>
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<target dev='hda' bus='ide'/>
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<address type='drive' controller='0' bus='0' target='0' unit='0'/>
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</disk>
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<disk type='file' device='disk'>
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<driver name='qemu' type='qcow2' cache='none'/>
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<source file='/tmp/QEMUGuest2.img'/>
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<backingStore type='file'>
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<format type='qcow2'>
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<metadata_cache>
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<max_size unit='kiB'>1024</max_size>
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</metadata_cache>
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</format>
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<source file='/tmp/backing-store.qcow'/>
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<backingStore/>
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</backingStore>
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<target dev='hdb' bus='ide'/>
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<address type='drive' controller='0' bus='0' target='0' unit='1'/>
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</disk>
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<controller type='usb' index='0'/>
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<controller type='ide' index='0'/>
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<memballoon model='virtio'/>
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</devices>
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</domain>
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