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6.3. Features
Each version contains a list of compatible features. The following table lists the features compatible with Red Hat Enterprise Virtualization 3.6.
| Feature | Description |
|---|---|
| Transparent huge pages memory policy | Allows you to define the availability of transparent huge pages for hosts. Acceptable values are true or false. |
| Gluster support | This features provides support for using Gluster Volumes and Bricks as storage. |
| POSIX-FS storage type | This feature provides support for the POSIX-FS storage type. |
| Port mirroring | Allows you to define the availability of port mirroring for virtual network interface cards. Acceptable values are true or false. |
| Display server time | Displays the current date and time in the API. |
| Display host memory | Displays the total memory for a specific host. |
| Display host sockets | Allows you to define the topology of a host CPU. Takes three attributes - sockets, threads and cores - which define the number of host sockets displayed, the number of threads and the number of cores per socket. |
| Search case sensitivity | Allows you to specify whether a search query is case sensitive by providing the case-sensitive=true|false URL parameter. |
Maximum results for GET requests | Allows you to specify the maximum number of results returned from a GET request. |
| JSON content type | Allows you to define a header that makes it possible to set a correlation ID for POST and PUT requests. |
| Activate and deactivate disks | Allows you to activate or deactivate a disk by specifying activate or deactivate as an action on a specific virtual disk. |
| Activate and deactivate network interface cards | Allows you to activate or deactivate a network interface card by specifying activate or deactivate as an action on a specific network interface card. |
| Snapshot refactoring | Allows you to refactor snapshots for virtual machines. |
| Remove template disks from specified storage domain | Allows you to remove virtual machine template disks from a specific storage domain using a DELETE request. |
| Floating disks | Floating disks are disks that are not attached to any virtual machine. With this feature, such disks also appear in the root collection rather than under specific virtual machines. |
| Asynchronous deletion | Allows you to specify that DELETE requests are to be performed asynchronously by specifying the async URL parameter. |
| Session-based authentication | Allows you to maintain a client-server session by providing an appropriate header, eliminating the need to log in with each request. |
| Virtual machine applications | Allows you to view a list of applications installed on a specific virtual machine. This list is located in the applications element of a specific virtual machine. |
| VirtIO-SCSI support | This feature provides support for para-virtualized SCSI controller devices. |
| Custom resource comments | Allows you to add custom comments to data centers and other resources. |
| Refresh host capabilities | Allows you to synchronize data on hosts and refresh the list of network interfaces available to a specific host. |
| Memory snapshot | Allows you to include the memory state as part of a virtual machine snapshot. |
| Watchdog device | Allows you to create watchdog devices for virtual machines. |
| SSH authentication method | Allows you to authenticate with hosts over SSH using an administrative user password or SSH public key. |
| Force select SPM | Allows you to force the selection of a host as SPM. |
| Console device | Allows you to control the attachment of console devices in virtual machines. |
| Storage server connections for storage domains | Allows you to view storage server connections to or from a specific storage domain. |
| Attach and detach storage server connections | Allows you to attach or detach storage server connections to or from a specific storage domain. |
| Single PCI for Qxl | Allows you to view multiple video devices via a single PCI guest device. |
| Add virtual machine from OVF configuration | Allows you to add a virtual machine from a provided OVF configuration. |
| Virtual network interface card profiles | Allows you to configure a profile that defines quality of service, custom properties and port mirroring for a specific virtual network interface card. |
| Image storage domains (tech preview) | Allows you to import images from and export images to an image storage domain such as an OpenStack image service (Glance). |
| Virtual machine fully qualified domain names | Allows you to retrieve the fully qualified domain name of a specific virtual machine. |
| Attaching disk snapshots to virtual machines | This feature provides support for attaching disk snapshots to virtual machines. |
| Cloud-Init | Allows you to initialize a virtual machine using Cloud Init. |
| Gluster brick management | Allows you to delete gluster bricks with data migration using the actions migrate and DELETE. The migrate action and stopmigrate action allow you to migrate data and reuse the brick. |
| Copy and move back-end disks | Allows you to copy and move disks in additional contexts. |
| Network labels | Allows you to provision networks on hosts using labels. |
| Reboot virtual machines | Allows you to reboot virtual machines via a single action. |
A full list of feature elements and their attributes is located at the top of the section for the relevant version:
<capabilities>
<version major="3" minor="4">
...
<features>
<feature>
<name>Transparent-Huge-Pages Memory Policy</name>
<transparent_huepages/>
</feature>
</features>
...
</version>
</capabilities>
