Page 612 - Cloud computing: From paradigm to operation

3 XaaS

Table II.1 – Relationship between Clause 7 DaaS functions and
ITU-T Y.3502 reference architecture

DaaS Keywords or simple Related functional Notes
functions descriptions components (FCs)
in [ITU-T Y.3502]
High Detecting failure Operational support This FC is for capturing incident or problem
availability for Redundancy set up systems- reports and managing those reports through to
DaaS Incident and resolution; the main role of the HA-F is to detect
Backup and restore
virtual desktop problem failure and manage it.
environment management
Load balance
VM auto migration
Power Calculating power Operational support Power management in DaaS is partly related
management consumption systems- with platform and virtualization management FC
of virtual Incident and and incident and problem management in that
desktop problem the function can deal with workload matters and
resource management prepare the incident by exceptional power
consumption.
Service Supporting various User layer- User function FC supports the service user to
connection type of DaaS clients User function access and use cloud services. Service
DaaS client connection connection is responsible for the connection
status info between a virtual desktop and a DaaS user on
the client side, so this FC is related with the SC-
Additional resource
request F. However, this is not enough to cover specific
operations of the function.
Security connection
Connection Gathering and None There is no specific FC to treat the connection
negotiation delivering network negotiation on the client side.
performance info and
client status info
Receiving the
negotiation result info

Client Peripheral connection None There is no specific FC to treat DaaS client's
peripheral Controlling event of peripherals.
connection peripheral
Service Reconnection Request None There is no specific FC to treat DaaS client's
continuity for on fault connection on the client side.
user Off-line
environment synchronization

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