Internet DRAFT - draft-tovar-cso-path-computation-requirements
draft-tovar-cso-path-computation-requirements
INTERNET-DRAFT Alejandro Tovar
Intended Status: Informational Luis M. Contreras
Expires: April 22, 2012 (Telefonica I+D)
Giada Landi
Nicola Ciulli
(Nextworks)
October 20, 2011
Path Computation Requirements for Cross-Stratum-Optimization
draft-tovar-cso-path-computation-requirements-00.txt
Abstract
The cross stratum optimization approach aims for providing a jointly
optimized provision of both IT and network resources according to the
application demands. In order to do that, the path computation
capabilities in the network, which are in charge of finding the
optimal connectivity resources, should take into account a new set of
requirements.
This memo explores the new needs derived from the cross stratum
optimization approach.
Status of this Memo
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Copyright and License Notice
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Copyright (c) 2011 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
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Table of Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3 Scenarios for cross-stratum path computation applicability . . 3
4 Requirements for cross-stratum path computation capabilities . 4
5 Security Considerations . . . . . . . . . . . . . . . . . . . . 4
6 IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 4
7 References . . . . . . . . . . . . . . . . . . . . . . . . . . 5
8 Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 5
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 5
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1 Introduction
This document summarizes requirements for path computation
capabilities in the framework of cross-stratum optimization, allowing
for the automation of efficient provision of both computing resources
and network connectivity tailored to application driven needs.
2 Terminology
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [RFC2119].
Additionally, the following terms are defined:
- IT resources: in the context of this document, the Information
Technology (IT) resources refer to computing and storage resources
(disk capacity, CPU, etc) typically residing on Data Centers (DC)
spread along the network.
3 Scenarios for cross-stratum path computation applicability
In [1] four scenarios are identified as target scenarios for getting
benefit from cross-optimization. These scenarios are the following:
a. Resource optimization (for both IT and network resources)
b. Responsiveness to quickly changing demands
c. Enhanced service resilience (via cooperative recovery
techniques between IT and network resources)
d. Quality of application experience (QoE) enhancement (via better
use of existing IT and network resources)
Furthermore, some other scenarios of interest can be also identified
e. Energy efficiency
f. Inter-domain extension of the demanded services (i.e., more
than one network provider is involved in the end to end service
provision)
Path computation capabilities must clearly address above scenarios.
In addition, it is expected backward compatibility with existing
standards. With this in mind, the following section summarizes the
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protocol requirements for cross stratum optimization support.
4 Requirements for cross-stratum path computation capabilities
The following list shows the requirements imposed by the scenarios
above to the path computation capabilities (elements and/or
algorithms) in the network:
R1 - They should handle path computation requests specifying IT-
related parameters in order to find the optimal path, selecting
both the IT resources and the associated path for their network
connectivity.
R2 - They should provide mechanisms for quoting IT resource and/or
network connectivity services for further decision on final
connectivity implementation.
R3 - They should include IT-related parameters in protection and
recovery mechanisms in order to provide resiliency in combined
services.
R4 - They should implement mechanisms and procedures allowing for
advanced reservation of both IT and network resources, in such a
way that the connectivity operation can be implemented on a
scheduled basis.
R5 - They should incorporate re-planning capabilities to optimize
the use of the IT and network resources, scaling up or down such
resources according to the real needs.
R6 - They should handle energy-related objective functions to be
able of minimizing the overall energy consumption for both IT and
network resources.
R7 - They should be able to efficiently support the previous
requirements in inter-AS scenarios.
5 Security Considerations
<TO DO>
6 IANA Considerations
<TO DO>
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7 References
[1] Y. Lee et al., "Research Proposal for Cross Stratum
Optimization (CSO) between Data Centers and Networks",
draft-lee-cross-stratum-optimization-datacenter-00,(work
in progress), March 2011.
8 Acknowledgments
This proposal is based on the research work being carried out within
the GEYSERS project (www.geysers.eu), funded by the European
Community's Seventh Framework Programme (FP7/2007-2013) under grant
agreement n. 248657.
Authors' Addresses
Alejandro Tovar
Telefonica I+D
EMail: e.networkcloud@tid.es
Luis M. Contreras
Telefonica I+D
EMail: lmcm@tid.es
Giada Landi
Nextworks
EMail: g.landi@nextworks.it
Nicola Ciulli
Nextworks
EMail: n.ciulli@nextworks.it
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