This file is indexed.

/etc/glance/metadefs/compute-guest-memory-backing.json is in glance-api 2:16.0.0-0ubuntu1.

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The actual contents of the file can be viewed below.

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{
    "namespace": "OS::Compute::GuestMemoryBacking",
    "display_name": "Guest Memory Backing",
    "description": "This provides the preferred backing option for guest RAM. Guest's memory can be backed by hugepages to limit TLB lookups. See also: https://wiki.openstack.org/wiki/VirtDriverGuestCPUMemoryPlacement",
    "visibility": "public",
    "protected": true,
    "resource_type_associations": [
        {
            "name": "OS::Nova::Flavor",
            "prefix": "hw:"
        },
        {
            "name": "OS::Glance::Image",
            "prefix": "hw_"
        },
        {
            "name": "OS::Cinder::Volume",
            "prefix": "hw_",
            "properties_target": "image"
        }
    ],
    "properties": {
        "mem_page_size": {
            "title": "Size of memory page",
            "description": "Page size to be used for Guest memory backing. Value can be specified as <number><unit> (i.e.: 2MB, 1GB) or 'any', 'small', 'large'. If this property is set in Image metadata then only 'any' and 'large' values are accepted in Flavor metadata by Nova API.",
            "type": "string"
        }
    }
}