Description of HyperV configuration options

Configuration option = Default value	Description
[hyperv]
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
mounted_disk_query_retry_count = 10	(IntOpt) The number of times to retry checking for a disk mounted via iSCSI.
mounted_disk_query_retry_interval = 5	(IntOpt) Interval between checks for a mounted iSCSI disk, in seconds.
power_state_check_timeframe = 60	(IntOpt) The timeframe to be checked for instance power state changes.
power_state_event_polling_interval = 2	(IntOpt) Instance power state change event polling frequency.
qemu_img_cmd = qemu-img.exe	(StrOpt) Path of qemu-img command which 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
wait_soft_reboot_seconds = 60	(IntOpt) Number of seconds to wait for instance to shut down after soft reboot request is made. We fall back to hard reboot if instance does not shutdown within this window.