Presentation delivered in the Research Track at ISC CLOUD'13 at Heidelberg (Germany) on Sep. 24th 2013.
It describe the Virtual Cluster Architecture developed during BonFIRE project and the reasons to do it. Some proof-of-concept experiments are also presented
Call Girls Ooty Just Call 9907093804 Top Class Call Girl Service Available
Federated HPC Clouds Applied to Radiation Therapy
1. Federated HPC Clouds applied to
Radiation Therapy
A. Gómez, L.M. Carril, R. Valin,
J.C. Mouriño, C. Cotelo
ISC Cloud‘13, Heidelberg (Germany)
Sep. 23-24th, 2013
2. Overview
Context.
Virtual Cluster Architecture.
Experiments on BonFIRE.
Conclusions.
The research leading to these results has received funding from the European Commision's
Seventh Framework Programme (FP7/2007-2013) under grant agreement number 257386
3. Context: eIMRT service
CTs Treatment
Results
Results
TPS
Second calculation
Personalized: One patient, one treatment
5. eIMRT Workflow
eIMRT code: Prepares inputs
for BEAMnrc MC. Seconds in
master computer
BEAMnrc MC simulations.
Independent jobs on CEs.
eIMRT code: collects outputs and
prepares inputs for DOSXYZnrc
Seconds in master computer
eIMRT code: collects outputs
and generates final output..
Seconds in master computer
DOSXYZnrc MC simulations.
Independent jobs on CEs.
6. SaaS issues
Local cluster:
– Could not be enough with many clients.
– Interferences between customer’s requests.
– Shared resources: Time-to-solution not guaranteed.
Grid:
– Interferences between clients.
– Shared resources: Time-to-solution not guaranteed.
Cloud:
– One treatment, one virtual cluster.
– No interferences between treatments, customers.
– But, How to guarantee the time-to-solution in a multi-
tenant out-of-control infrastructure?
7. IaaS issues for HPC/HTC SaaS
Failures of sites. Needs Fault-tolerant
design.
Application Performance Variability
between deployments. Needs elasticity.
– Different IaaS back-end servers.
– Multi-tenancy. Sharing resources among IaaS
customers.
– Different Cloud providers.
– Evolution of IaaS infrastructure.
J. Schad, et al, Runtime Measurements in the Cloud:
Observing, Analyzing, and Reducing Variance., Proceedings of
the VLDB Endowment, Vol. 3, No. 1, 2010
13. Elasticity Engine
Controls number of CEs based on Key
Application Performance measurements.
Enlarges the cluster to keep performance
and fulfill deadlines.
Decreases size if App. Performance is
higher than needed, to decrease costs.
17. Application execution. One vs Two sites
VC Conf.: Distributed VC (_dist)
BonFIRE sites:
– INRIA: Master + CEs
– HLRS: CEs
Deployment time decreases.
App:Two sites faster than one site.
But because second site has better
CPUs.
Impact of deployment ~ 10% total
time.
19. Horizontal elasticity
Monitoring application
performance works.
We have modified software
to produce information more
frequently.
Execution with deadline.
Elasticity works.
24. Conclusions
Distributed VC can be used to speed up HTC
applications.
Elasticity Engine based on Key Application
Performance indicator for HTC works.
High QoS can be provided in VC using
distributed VC + elasticity.
BonFIRE provides infrastructure for experiments
about new concepts and services on Cloud.