Description of configuration options for hyperv

Configuration option=Default value	Description
dynamic_memory_ratio=1.0	(FloatOpt) Enables dynamic memory allocation (ballooning) when set to a value greater than 1. The value expresses the ratio between the total RAM assigned to an instance and its startup RAM amount. For example a ratio of 2.0 for an instance with 1024MB of RAM implies 512MB of RAM allocated at startup
enable_instance_metrics_collection=False	(BoolOpt) Enables metrics collections for an instance by using Hyper-V's metric APIs. Collected data can by retrieved by other apps and services, e.g.: Ceilometer. Requires Hyper-V / Windows Server 2012 and above
force_hyperv_utils_v1=False	(BoolOpt) Force V1 WMI utility classes
instances_path_share=	(StrOpt) The name of a Windows share name mapped to the "instances_path" dir and used by the resize feature to copy files to the target host. If left blank, an administrative share will be used, looking for the same "instances_path" used locally
limit_cpu_features=False	(BoolOpt) Required for live migration among hosts with different CPU features
qemu_img_cmd=qemu-img.exe	(StrOpt) qemu-img is used to convert between different image types
vswitch_name=None	(StrOpt) External virtual switch Name, if not provided, the first external virtual switch is used