Optimizing Virtual Resource Management in Cloud Systems

[The talk is cancelled]

Speaker:        Dr. Haiying (Helen) Shen
                Computer Science Department
                University of Virginia

Title:          "Optimizing Virtual Resource Management in Cloud Systems"

Date:           Thursday, 10 August 2017

Time:           10:30am to 11:30am

Venue:          Room 2463 (via lifts 25/26), HKUST

Abstract:

Cloud service providers maximize energy efficiency by operating the
equipment in their data centers at high levels of utilization. But these
providers must also satisfy Service Level Objectives (SLOs) for their
tenants, which complicates resource provisioning. Existing work on
improving resource utilization in data centers focuses mainly on Virtual
Machine (VM) consolidation. As data centers are often oversubscribed,
resources such as CPU and bandwidth are stretched thin as they are shared
across many tenants. In particular, when VMs with intense resource
requirements are located on the same physical machine, they compete for
scarce resources, which may lead to poor performance and violations of
SLOs. Much effort has been devoted to developing strategies for resource
provisioning in the initial VM allocation and VM migration phases.
Previous methods, however, neglect to take a number of subtle factors into
consideration, which limits their effectiveness in practice. For example,
in predicting resource demands, previous methods assume that applications
exhibit certain demand patterns which may not be accurate, and they
neglect misalignment between the utilization curves of VMs running the
same application.  These issues may lead to either resource
underprovisioning or overprovisioning.  Previous methods also neglect that
Last Level Cache contention exists between VMs on the same physical
machine, which degrades VM performance. In this presentation, I will
introduce approaches that address the subtleties described above. These
approaches should contribute to higher resource utilization, higher profit
for cloud providers, and yet at the same time better quality-of- service
for cloud users.


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Biography:

Dr. Haiying (Helen) Shen is currently an Associate Professor in the
Department of Computer Science at University of Virginia. She received the
2015 IEEE Technical Committee on Scalable Computing (TCSC) Mid-career
Award, the 2010 Microsoft Faculty Fellowship Award, the 2015 IBM Faculty
Award, the 2013 NSF CAREER Award, and the 2013 Sigma Xi Clemson Chapter
Young Investigator Award. Her research interests include Cloud computing
and datacenters, Big data, Distributed systems, High performance
computing, and Cyber-physical systems. Dr. Shen has made substantial
contributions to her field with over 200 publications in prestigious
conferences and journals such as IEEE/ACM Transactions on Networking
(TON), IEEE Transactions on Parallel and Distributed System (TPDS), IEEE
Transactions on Computers (TC), IEEE Transactions on Mobile Computing
(TMC), ACM Symposium on Cloud Computing (SOCC), ACM Multimedia, IEEE
International Conference on Computer Communications (INFOCOM), and IEEE
International Conference on Distributed Computing Systems (ICDCS). She
currently advises five Ph.D. students. Dr. Shen is a subject area editor
for the Scalable Computing Journal, and an associate editor for the
International Journal of Parallel, Emergent and Distributes Systems
(IJPEDS) and for the Journal of Information Science and Engineering. She
is also a program committee member of many leading conferences, and the
former program co-chair for a number of international conferences.