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Apologies to all about the late notice of this message.

Richard West                       
PhD Defense of Research
Friday, June 2nd
Room 354 CoC
2-4pm

Adaptive Real-Time Management of Communication and Computation Resources

Complex distributed applications, including virtual environments,
tele-medicine and video-on-demand, require quality of service (QoS)
guarantees on the end-to-end transfer of information across a network.
To generate, process and transfer such information in a manner
satisfactory to each application requires the management of all the
resources, both communication and computation-bound, along the `path'
from source to destination. Furthermore, the problem of providing QoS
guarantees to these applications is complicated by the fact that: (1)
the quality of service requirements of each application can vary with
time, and (2) the availability of each resource varies with time
depending on the demands from (a potentially variable number of)
competing applications. In many such situations, static resource
allocation results in poor resource utilization and, hence, poor
scalability of service. In order to support more applications and
provide better overall quality of service, multiple resources must be
managed in a coordinated manner.

This work focuses on the system mechanisms and policies to maximize,
or at least maintain, the quality of service for distributed,
real-time applications, in situations where there are variable
resource demands from applications. Efficient mechanisms and policies
are needed to coordinate, allocate and adapt communication and
computation resources at run-time, in order to meet real-time and
other quality of service constraints. Consequently, in this talk, I
will describe: (1) the mechanisms used in the Dionisys quality of
service infrastructure, that enable service to be monitored and
adapted on behalf of each application, and (2) Dynamic
Window-Constrained Scheduling (DWCS) of communication and computation
resources. DWCS is designed to support real-time applications like
those described above, with explicit loss and delay constraints. In
certain situations, DWCS is provably optimal in terms of the service
it provides to applications.

Committee:
Karsten Schwan (advisor)
Mustaque Ahamad
Calton Pu
Ellen Zegura
Sudhakar Yalamanchili (EE Dept, external member)















-- 
					
					-Richard West (west@cc.gatech.edu)