Harmony GridNets Invited Phosphorus by liaoqinmei

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									                Enabling Network Resources in the Grid:
               Functionalities and Services in Harmony1

       Sergi Figuerola1, Joan A. García-Espín1, Jordi Ferrer1, Alexander Willner, and            Formatted: Spanish (Spain, International Sort)
                                     Hanxi Zhang,
                                                                                                 Formatted: Spanish (Spain, International
                            and Hanxi Zhang2 and Michel Savoie2                                  Sort), Superscript
                  1: Network Technologies Cluster, i2CAT Foundation                              Formatted: Spanish (Spain, International Sort)
                  c/ Gran Capità 2-4, Edifici Nexus I, Barcelona, Spain
                                                                                                 Formatted: Superscript
      {sergi.figuerola,joan.antoni.garcia,jordi.ferrer}@i2cat.net
                 2 University of Bonn, Institute of Computer Science IV                          Formatted: Spanish (Spain, International Sort)
                             Römerstr. 164, Bonn, Germany                                        Formatted: Superscript
                            willner@cs.uni-bonn.de
                          32: Communications Research Centre                                     Formatted: Spanish (Spain, International Sort)
                  3701 Carling Avenue, Ottawa, ON, Canada K2H 8S2                                Formatted: English (United Kingdom),
                   {hanxi.zhang, michel.savoie}@crc.ca                                           Superscript
                                                                                                 Formatted: English (United Kingdom)
                                                                                                 Formatted: English (United Kingdom), Not
         Abstract. During the last decade, Grid applications have become one of the              Superscript/ Subscript
         principal consumers of network resources consumers. Grid applications would
         greatly benefit from a network-aware scheduler. Harmony is a network resource           Formatted: Not Superscript/ Subscript
         brokering system integrated with the Grid middleware Middleware enabling                Formatted: Not Superscript/ Subscript
         Grid users to use in a seamless and transparent way the network resources
         belonging to heterogeneous and independent administrative domains as well as            Formatted: Spanish (Spain, International Sort)
         it maximizes the network usage by means of the advance malleable                        Formatted: Spanish (Spain, International Sort)
         reservations. The Harmony approach fulfills the requirements of the Grid
         applications providing a Network Service Plane, which unifies the underlying            Formatted: Not Superscript/ Subscript
         network management systems.                                                             Formatted: Not Superscript/ Subscript
Keywords: Grid Middleware Integration, NSP, QoS, GMPLS, MPLS, aAdvance                           Comment [JG1]: Not a keyword
rReservation.                                                                                    Comment [JG2]: This article is about interfacing,
                                                                                                 we should remove this keyword
                                                                                                 Comment [JFR3]: Ok for me. I think we should
1 Introduction                                                                                   add a new keyword, five is a prime number ;)
                                                                                                 Comment [JFR4]: Joan Antoni ?
Text here.
                                                                                                 Formatted: Normal
1 paragraph: Discuss the need for Grid and Network integration (eg, Industrial grids,
                                                                                                 Formatted: Highlight
LHC, …).
   1 paragraph: Proofs of concept in the community (Phosphorus and other projects)
   1. paragraph: Appearance of standarisation efforts (OGF NSI, Glif Fenius)
   1 paragraph. Paper structure

1   Research for this paper was partially financed by the EU in the IST-034115 project
    PHOSPHORUS [1181] (Lambda User Controlled Infrastructure for European Research). We
    would like to specially acknowledge the contributions provided by all our project partners
    and their collaboration in this research work.
2   S. Figuerola, J.A. García-Espín, J. Ferrer, H. Zhang, and M. Savoie                   Field Code Changed
                                                                                          Formatted: Spanish (Spain, International Sort)
2   Sergi Figuerola1, Joan A. García-Espín1, Jordi Ferrer1, Hanxi Zhang2 and Michel
                                                                                          Formatted: Spanish (Spain, International Sort)
Savoie2Sergi Figuerola, Joan A. García-Espín, Jordi Ferrer, and Hanxi Zhang
                                                                                          Formatted: Do not check spelling or grammar
2 Related Work                                                                            Comment [JFR5]: Jordi Ferrer



1 paragraph: Harmony details: what’s been tested? Which applications work with            Comment [JFR6]: Still missing this paragraph
HarmonyHarmony [11] provides a functional service plane that supports resourcethe
                                                                                          Formatted: Default Paragraph Font
co-allocation of network resources and malleable advance reservations in multi-
domain, multi-technology, and multi-vendor environments. The performance
evaluation and scalability of the Harmony architectures have been further evaluated
and discussed in [12] and [13]. However, Harmony is not the only solution that
fulfills the gap between the Grid and the Network.
   There are other systems providing solutions for path provisioning, resource co-
allocation and scheduling. Argia [2], previously an implementation of User
Controlled Light-path Path Provisioning (UCLP) system software, is an existing
solution that enables the user to partition a single domain into several management
domains and provides dynamic circuit provisioning. In the Harmony context, Argia is
referred to as a Network Resource Provisioning System (NRPS). Allocation and
Reservation in Grid-enabled Optic Networks (ArgonARGON) [3] is another existing
NRPS that supports a wide range of complex advance reservation mechanisms.
However, these existing solutions are focused on intra-domain scheduling and
resource co-allocation;: they do not attempt to cover inter-domain scenarios. Harmony
is built over these existing NRPSs, aiming to manage inter-domain scenarios by
means of adding an extra layer that is able to inter-operate with all the NRPSs. Thus,
our approach achieves the inter-operability of three NRPSs:, Argia, ArgonARGON,
and Drac DRAC [4]; and GMPLS domains. At the same time, our approach, due to
confidentiality reasons, does not reveal internal domains topology information.
   Additionally, there are currently in the community some related projects that aim at
similar challenges, although from a different perspective., while oOur approach view
is from the user to the network view. Grid-enables enabled GMPLS (G2MPLS) [6],
developed within the PHOSPHORUS project, is an enhancement to the
ASON/GMPLS Control Plane architecture that implements the concept of Grid
Network Services (GNS). Moreover, external to the PHOSPHORUS project, the
Automated Bandwidth Allocation across Heterogeneous Networks (AutoBAHN)
system, originated within the GÉANT2 project or an inter-domain control plane based
on OSCARS are BoD systems that provide end-to-end multi-domain network paths.
                                                                                          Comment [JFR7]: Jordi & Joan


3 Services for the Grid

Resource co-allocation and scheduling

Topology related services
1 Resource co-allocation and scheduling (reservation service)
   2. Topology (we need a better word to define this service)
       Enabling Network Resources in the Grid: Functionalities and Services in Harmony   3


4 Harmony Service Interface

The services in Harmony are offered by means of its interface, the Harmony Service
Interface (HSI). The HSI is the element of the system that enables the integration
between the capabilities, functionalities and services of the resource broker and the
outer world, as well as enables the communication between entities within the service
plane. Therefore, the HSI is the responsible of for offering to the Grid resource: co-
allocation, scheduling and network topology related services. Thus, Grid applications
can access directly the NSP and its services through the service interface.
   The design of the interface takes into account the modularity and the services
nature in order to build an easily-maintained module. Thus, the HSI is composed of
three main modules: Reservation Web Service (R-WS), Topology Web Service (T-
WS), and Notification Web Service (N-WS). Moreover, there is an extra module
within the HSI, called Common Types, which contains all the common data types
used by the other modules. Figure 1 depicts the modules designed within the service
interface.
4   S. Figuerola, J.A. García-Espín, J. Ferrer, H. Zhang, and M. Savoie               Formatted: Spanish (Spain, International Sort)
                                                                                      Field Code Changed
2   Sergi Figuerola1, Joan A. García-Espín1, Jordi Ferrer1, Hanxi Zhang2 and Michel
                                                                                      Formatted: Spanish (Spain, International Sort)
Savoie2Sergi Figuerola, Joan A. García-Espín, Jordi Ferrer, and Hanxi Zhang
                                                                                      Formatted: Do not check spelling or grammar
                                                                                      Comment [JG9]: Image is not viewable, need for
                                                                                      much higher contrast




                                                                                      Comment [JFR8]: Image Changed. Now black &
                                                                                      white image
       Enabling Network Resources in the Grid: Functionalities and Services in Harmony   5

Fig. 1. Component of the Harmony Service Interface components. Three Web Services are the
visible part of the interface. Grid Middleware accesses the services offered by the Network
Service Plane via the Reservation Web Service (R-WS) and Topology Web Service (T-WS).

  The HSI is built over an SOA model and is WSRF v1.2 compliant. Therefore, the
messages within each module are defined in the Web Service Description Language
(WSDL), while the data types are defined in the XML Schema language or definition
(XSD).


4.1 Reservation Web Service

Reservation Web Service is the element of the service interface that enables the Grid
Middleware to create, cancel and query advance reservations, both malleable and
fixed, in the network. The functionalities offered to the middleware, by means of the
methods that can be invoked, are presented in Table 1.

             Table 1. Reservation-WS methods offered to the Grid Middleware

     Functions                                 Description                                    Formatted: Centered
                     Checks the availability of the resources required for
                     connections with endpoints in the same domain or in different
availability request domains. The resources are not yet reserved, instead a response
                     indicating whether the reservation would be feasible or not is
                     sent.
                     Reserves network resources for one or more services. The
                     reservation can contain fixed constraints or malleable
reservation request constraints. The requesting entity receives a response
                     containing the result of the request and an identifier of the
                     reservation.
                     Queries one or more reservations’ status. The possible status of
 reservation status one reservation previously made in the network are: pending,
      request        tear up in progress, active, tear down in progress, completed,
                     cancelled by user, and cancelled by system.
                     Deletes a reservation. Once the reservation is cancelled, the
 cancel reservation
                     NSP releases all the resources involved in the connection and
      request
                     tag them as available again.


4.2 Topology Web Service

Harmony has to know which resources are under the control of the system. Therefore,
the system must store, retrieve, modify and delete the resource-related information
according to the topology of the controlled network domains. Topology-WS enables
the system to carry out all these tasks. Table 2 shows the methods available in this
WS.
6      S. Figuerola, J.A. García-Espín, J. Ferrer, H. Zhang, and M. Savoie                    Formatted: Spanish (Spain, International Sort)
                                                                                              Formatted: Spanish (Spain, International Sort)
2   Sergi Figuerola1, Joan A. García-Espín1, Jordi Ferrer1, Hanxi Zhang2 and Michel
                                                                                              Field Code Changed
Savoie2Sergi Figuerola, Joan A. García-Espín, Jordi Ferrer, and Hanxi Zhang
                                                                                              Formatted: Do not check spelling or grammar
                            Table 2. Topology-WS available methods                            Formatted: Centered

        Functions                                  Description                                Formatted: Centered
                          These methods allow the system to add a domain controlled by
    add/edit/delete/get   an NRPS, delete it, update this domain or get all the domains
         domain           controlled by the system, that is, get all the domains present in
                          the Inter-domain Broker database.
                          All of these methods are used in order to manage the endpoints
    add/edit/delete/get   within the Harmony. Thus, all the endpoints, border or user,
         endpoint         belonging to the different domains controlled by the system
                          can be managed.
    add/edit/delete/get   These set of methods manage the links that inter-connect the
           link           domains controlled by the system.
                          While the previously introduced operations are intended for
                          manually editing the information stored in an Inter-domain
                          Broker, this operation is used for the automated topology
    addOrEditDomain       exchange. It is used by sub-domains to register with their
                          parent domains and by the flooding algorithm that distributes
                          topology information between peer Inter-domain Brokers,
                          when the NSP is operating in distributed mode.


4.3 Notification Web Service

Notification Web Service is the component of the HSI responsible of the event
notification management. N-WS eliminates the need for the system to be polled
periodically. E. g. wWhen a connection is aborted, the higher layer entity that created
the corresponding reservation will be notified. Thus, it does not need to poll in regular
intervals whether the service it request for is still active.


5 Grid and Service Plane Applications section (KoDaVis, MSS,
HSVO) (NAME: TBD)Integration Cases                                                            Comment [JFR10]: Hanxi will finish this section


   The Harmony prototype has been integrated with several Grid applications.
Collaborative Visualization of Huge Atmospheric Data in a Heterogeneous
Environment (KoDaVis) [5] is a distributed, collaborative visualization system with
remote access to huge atmospheric simulation data originating from simulations of the
transport of chemical tracers in the troposphere. Datasets with a typical size of 1
Terabyte are stored in one or more central data servers and in a collaborative session,
the visualization clients connects to the data servers and receive data on-demand. This
application was integrated with the Harmony system and used the world-wide
scenario where the brokering system is deployed.
           Enabling Network Resources in the Grid: Functionalities and Services in Harmony           7


   This scenario involves several countries such as Spain, Germany, Canada, Korea,
the United States of America, the United Kingdom, Poland, and the Netherlands.
Each domain is composed of distinct physical equipment, such as the Nortel OME
6500, HDXc, and Optera 5200; Cisco Catalyst 6509, Alcatel-Lucent 1678, 1850, and
7750, among others. The inter-domain links go through GÉANT2 2, GLIF3,
CANARIE4, and KreoNET5 facilities. Network Service Plane connections between
entities go through a VPN.
   Additionally, within the PHOSPHORUS project, in order to orchestrate the
reservation and allocation of all kinds of Grid resources, including the network, the
Meta Scheduling Service (MSS) has been implemented as the one responsible of for
these functions. This The MSS, integrated also with Harmony, interfaces towards
UNICORE 6 and Globus tool-kit.
   Health Services Virtual Organization (HSVO) is a Canadian project funded under                        Formatted: Not Highlight
Canarie CANARIE’s Network-Enabled Platforms Funded Canadian program that
                                                                                                         Formatted: Not Highlight
aims to offer distributed communities of health-care practitioners collaborative access
to 3D anatomical visualization resources, medical mannequins and software
simulators, etc. A common use case in the HSVO test bed is to use the RSV (Remote
Stereo Viewer)Remote Stereo Viewer (RSV) [77] to view and render 3D anatomical
data sets streamed from the IiL Server located in Sunnyvale, California, across the
CENIC6 theand Canarie CANARIE networks. A human user would launch the                                    Comment [MS11]: The Light-Path that is
SAVOIR software [88] [10], which orchestrates the following activities behind the                        dynamically created is terminated in Seattle on a
scene: resource discovery, provisioning the optical network by calling the Argia                         GbE interface that is connected to CENIC. A
                                                                                                         dedicated 1 Gbps VLAN is used to extend the LP
system, and launches the RSV viewer at the client side. The RSV streaming requires                       from Seattle to Sunnyvale where the Iil Server is co-
a bandwidth of about 30~40 M bps.                                                                        located at the CENIC Sunnyvale POP.
   The SAVOIR software is designed such that, the network provisioning can be done
transparently, by either invoking Argia or the Harmony system. The Harmony-HSVO
integration was recently demonstrated at the TNC 20’09 conference held in Malaga,
Spain [9].
                                                                                                         Formatted: Centered




                       10.8.1.6                    10.3.1.2
    Sunnyvale,                                                        10.3.1.6
    California                    CRC                         i2CAT
                                                                                       Malaga, Spain
                                        10.8.1.3
           HSVO                                                                  TNC      10.3.2.2       Formatted: English (United States)
                                                                      10.3.2.1
2
                    10.8.2.1                                                                             Formatted: English (United States)
  www.geant2.net
3 www.glif.is                                                                                            Formatted: English (United States)
4 www.canarie.ca
5                                                                                                        Formatted: English (United States)
  www.kreonet.net
6 www.cenic.org
                                                                                                         Formatted: English (Canada)
8   S. Figuerola, J.A. García-Espín, J. Ferrer, H. Zhang, and M. Savoie                  Field Code Changed
                                                                                         Formatted: Spanish (Spain, International Sort)
2   Sergi Figuerola1, Joan A. García-Espín1, Jordi Ferrer1, Hanxi Zhang2 and Michel
                                                                                         Formatted: Spanish (Spain, International Sort)
Savoie2Sergi Figuerola, Joan A. García-Espín, Jordi Ferrer, and Hanxi Zhang
                                                                                         Formatted: Do not check spelling or grammar

10.8.2.2


                                                          interdomain link
                                                          intradomain link
                                                          border endpoint
                                                          user endpoint




Fig. 2. Inter-domain logical topology of the Harmony – HSVO joint demonstration at the
TERENA Networking Conference 2009 (TNC 2009). The anatomical data was streamed from
Sunnyvale, California to Malaga, Spain through the Light-Path set up by Harmony.

    Fig. X          Inter-domain Logical Topology of the Harmony-HSVO Demo at
                                       TNC’09

   As shown in Fig. XFig. 2 above, the Harmony-HSVO demo involves four
Harmony domains. The physical connection to be provisioned by the Harmony
system goes from Malaga, Spain and all the way to Sunnyvale, USA.
        Enabling Network Resources in the Grid: Functionalities and Services in Harmony        9


                                                                                                   Formatted: Indent: First line: 0"




                    Information Channel                                                            Formatted: Italian (Italy)
                  Registration Server @                               Harmony Service @ UNI-
               UofWisconsin La Crosse, WI,                            BONN Bonn, Germany
                           USA                                    5


                                                    SAVOIR Management                              Formatted: English (United Kingdom)
      IiL Server                                    Web Service @ NRC,
                            3
@Sunnyvale CA, USA                                  Fredericton, Canada
                                             2
   `
                                RSV Edge Service
                 6              @ CRC Ottawa,
                                Canada
                                                            1
                                                    4



                                                 TNC’09 venue @
                                                 Malaga, Spain




 Fig. 3. Workflow of the joint Harmony – HSVO joint demonstration at the TERENA
 Networking Conference 2009 (TNC 2009).

                 Fig. Y Workflow of the Harmony-HSVO Demo, TNC’09
10   S. Figuerola, J.A. García-Espín, J. Ferrer, H. Zhang, and M. Savoie                   Field Code Changed
                                                                                           Formatted: Spanish (Spain, International Sort)
2   Sergi Figuerola1, Joan A. García-Espín1, Jordi Ferrer1, Hanxi Zhang2 and Michel
                                                                                           Formatted: Spanish (Spain, International Sort)
Savoie2Sergi Figuerola, Joan A. García-Espín, Jordi Ferrer, and Hanxi Zhang
                                                                                           Formatted: Do not check spelling or grammar
   The Harmony-HSVO demo at TNC 20’09 involves the complex collaboration of
software components distributed across multiple international sites . Aas shown in
Fig. 3Y above. First, a presenter at the TNC 20’09 venue at Malaga, Spain launches
the SAVOIR floating dock and requests the RSV edge service. The SAVOIR
management web Web service Service authenticates the user and authorizes access to
the requested edge services. Then the RSV service queries the information channel
registration server to obtain active information channels. If the requested channel
requires a dedicated Llight-Ppath, the SAVOIR software request the Harmony Service
hosted in Bonn, Germany to set up an STS24c (STM8c equivalent) lLight-pPath from           Comment [JFR12]: Changed Light-Path to be
Malaga to Sunnyvale, USA. Upon the successful provisioning of the Llight-pPath,            coherent on the whole docuemnt
RSV streaming begins, and the audiences at the Malaga venue can view and render
3D anatomical data streamed from Sunnyvale. When the user closes the RSV viewer,
the SAVOIR system will automatically invokes the harmony Harmony system to tear
down the Llight-pPath.
   Integration between Harmony and the HSVO SAVOIR systems shows that the
Harmony system can be seamlessly integrated into a distributed application that
requires dedicated bandwidth over multiple domains on demand.
                                                                                           Formatted: Justified, No bullets or numbering
                                                                                           Formatted: Bullets and Numbering
6 Conclusions




The manuscript makes presents an overview of the Harmony resource brokering
system. Harmony provides an architecture that allows multi-domain, multi-
technology, multi-vendor network resource co-allocation and scheduling. The paper
also shows that the broker provides a whole range of services, focused on the Grid
Middleware integration. This integration fits the need of the new applications for the
e-science community. The paper also presents the Harmony Service Interface, which
is the element that enables the integration between the NSP and the Grid Middleware.
    We have deployed our prototype over across a world-wide scenario, proving that
topology abstraction in the service layer added. We have demonstrated in at several        Comment [JFR13]: Sentence not finished
international events the integration between our brokering system and some external
applications, such as KoDaVis or HSVO. These demonstrations have showed that
Harmony achieves all the requirements of the Grid. Additionally, these
demonstrations have showed how scientific applications can obtain a real benefit of
from the integration. Due to the distinct nature of the applications, it has been proved
proven that the NSP can be integrated in a seamless way with any Grid application.
    We have also showed shown that the work done under the Harmony system is also          Comment [MS14]: What section of the paper
present on standardization bodies, since it is directly involved with the Network          supports this statement?
Service Interface (NSI) working group, belonging to the Open Grid Forum. The work
is also taken into account at by the Fenius initiative, the former Generic Network
Interface (GNI), of the Glif GLIF working group.
      Enabling Network Resources in the Grid: Functionalities and Services in Harmony       11


7 Future work

Based on these results, our approach can be extended to other applications that require
high amounts of bandwidth at a determinated time. Thus, short-term objectives focus
on integrating our system with more Grid applications. Long-term objectives mainly
focus on enhanced network resiliency capabilities. This includes as well the
computation of disjoint paths as the delegation of responsibilities, path monitoring,
and automatic re-routing and –connection.


References

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 7. [Online] http://havnet.stanford.edu/research/rsv_app.html                                     Formatted: German (Germany)
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     cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=8913869&article=0Spencer, B., Liu, S.: Modelling        Formatted: German (Germany)
     and Managing Collaborative Sessions for a Virtual Organization. Semantics, Knowledge         Formatted: German (Germany)
     and Grid, International Conference on, pp 408-411. Fourth International Conference on
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 9. TNC’09 paper by Harmony Team?                                                                 Formatted: Font: Not Italic
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     Asia-Pacific Conference on Services Computing IEEE, pp 813-818, (2008) IEEE Asia-            presentation!
     Pacific Services Computing Conference.
 11. Willner, A, Barz, C., García-Espín, J. A., Ferrer, J., Figuerola, S., and Martini, P.:       Formatted: Bullets and Numbering
     Harmony – Advance Reservations in Heterogeneous Multi-domain Environments. In                Formatted: Font: Not Italic
     Proceedings of the IFIP/TC 6 Networking 09 Conference.
 12. Figuerola, S., García-Espín, J .A., Ferrer, J., and Willner, A.:Performance Analysis of      Formatted: English (United Kingdom)
     Harmony, an Optical, Multi-domain Network Resource Broker. 11th International                Formatted: Superscript
     Conference on Transparent Optical Networks 2009 (ICTON 09).
12   S. Figuerola, J.A. García-Espín, J. Ferrer, H. Zhang, and M. Savoie                         Formatted: Spanish (Spain, International Sort)
                                                                                                 Field Code Changed
2   Sergi Figuerola1, Joan A. García-Espín1, Jordi Ferrer1, Hanxi Zhang2 and Michel
                                                                                                 Formatted: Spanish (Spain, International Sort)
Savoie2Sergi Figuerola, Joan A. García-Espín, Jordi Ferrer, and Hanxi Zhang
                                                                                                 Formatted: Do not check spelling or grammar
 13. Figuerola, S., García-Espín, J .A., Ferrer, J., and Willner, A.: Scalability Analysis and
     Evaluation of the Multi-domain, Optical Network Service Plane in Harmony. 35th              Formatted: Superscript
     European Conference on Optical Communication 2009. (ECOC 09). In press.

								
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