16
Introduction
Farm
A Parallels RAS Farm is a logical grouping of objects for the purpose of
centralized management. A Farm configuration is stored in a single database
which contains information about all objects comprising the Farm.
A Farm consists of at least one Site, but may have as many sites as necessary.
Site
A Site consists of at least one RAS Publishing Agent, RAS Secure Client
Gateway (or multiple gateways), and RAS agents installed on RD Session
Hosts, VDI providers, and Windows PCs. Note that a given RD Session Host,
VDI provider, or PC can be a member of only one Site at any given time.
Licensing Site
The Site that manages Parallels RAS licenses in a Parallels RAS Farm. By
default, the server on which you install Parallels RAS becomes the Licensing
Site. If you create additional sites later, you can designate any one of them as
the Licensing Site.
There can be only one Licensing Site in a given Farm. All other sites are called
secondary sites.
Note: Parallels RAS updates or upgrades must be applied to the Licensing Site
first.
RAS Secure Client Gateway
RAS Secure Client Gateway tunnels all traffic needed by applications on a
single port and provides secure connections.
HTML5 Client
HTML5 client allows users to view and launch remote applications and
desktops in a web browser. The HTML5 client functionality is a part of RAS
Secure Client Gateway.
Publishing
The act of making items installed on a Remote Desktop Server, VDI provider or
Remote PC available to the users via Parallels RAS.
RAS Publishing Agent
RAS Publishing Agent provides load balancing of published applications and
desktops.
RAS RD Session Host Agent
RAS RD Session Host Agent collects information from Microsoft RDS hosts
required by the Publishing Agent and transmits to it when required.
Remote PC Agent
Remote PC Agent collects information from Remote PC hosts required by the
Publishing Agent and transmits to it when required.
RAS Guest Agent
RAS Guest Agent collects information from the VDI desktop required by RAS
Publishing Agent and transmits to it when required.
RAS VDI Agent / RAS Provider
Agent
RAS VDI Agent collects information from the Parallels RAS Infrastructure and is
responsible for controlling VDI through its native API. RAS VDI Agent is built into
the RAS Publishing Agent and is available by default. It can be used to control
multiple VDI providers in a Parallels RAS Farm.
RAS Provider Agent is the same as RAS VDI Agent, but the term is used in the
context of Windows Virtual Desktop (described at the end of this table).
RAS VDI Agent dedicated
RAS VDI Agent dedicated is similar to the RAS VDI Agent described above with
one important difference — it is a separate component that must be installed
from the Parallels RAS installer and can only control a single VDI provider.
RDSH or RD Session Host
RDSH makes applications and a full desktop accessible to a remote client that
supports Remote Desktop Protocol (RDP). RDSH replaced Terminal Servicer
beginning with Windows 2008 R2.
HALB
High Availability Load Balancing (HALB) is an appliance that provides load
balancing for RAS Secure Client Gateways. Parallels HALB virtual appliance is
available for the following hypervisors: Hyper-V, VMware. Multiple HALB Virtual