Page 588 - Cloud computing: From paradigm to operation

3 XaaS

VDRM-FS Virtual Desktop Resource Management Functions

VI-FS Virtualization Infrastructure Functions
VM Virtual Machine

5 Conventions

Throughout this Recommendation, the term "DaaS user" is to be understood as equivalent to "cloud service
user (CSU)".

6 Relationship between DaaS logical components and DaaS functions

There are five DaaS logical components in Recommendation [ITU-T Y.3503]:
1) DaaS client;
2) connection manager;
3) resource pool;
4) virtualization infrastructure;

5) virtual desktop delivery.
NOTE – The relationship between the DaaS logical components and the cloud computing reference architecture in
[ITU-T Y.3502] is described in Appendix I.

In DaaS, a connection manager is configured to establish connections to a DaaS client and manage these
connections. Virtual desktops in the virtualization infrastructure are provided to DaaS users through virtual
desktop delivery. The resource pool is provisioned or configured to assign optimum resources to virtual
desktops for the DaaS clients. These DaaS logical components are realized by the following DaaS functions:

– virtualization infrastructure support functions: These functions support DaaS in terms of
virtualization infrastructure with resource pool;
– virtual desktop connection and delivery functions: These functions configure, provision, and deliver
virtual desktops in connection manager and virtual desktop delivery;
– virtual desktop resource management functions: These functions manage resources in resource
pool for virtual desktops;
– DaaS client support functions: These functions support DaaS from a DaaS client's perspective.

Table 6-1 shows the relationship between DaaS logical components in [ITU-T Y.3503] and DaaS functions in
this Recommendation.

580