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1

Coordinating New Grid Proposals

Larry Price

HEP-CCC

18 October 2002


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9/19/2014 R.Pordes,Fermilab 2

STATUS OF

HIJTB and GLUE

Ruth Pordes, Fermilab

Representing the Grid Interoperability Working Groups:


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Joint Technical Board

No meetings held since last HICB in order to continue progress on GLUE Stage I deliverables.

Search for a Co-chair may finally be over - Ian Bird - LHC Computing Project GridDeployment Area Manager is proposed (and would accept) the responsibility.

We ask for your endorsement of this.

Plan to hold JTB meeting to propose 2 new GLUE/JTB sub projects in the next couple of weeks -revert to usual slot of 4 pm INFN - 7 am Pacific time on 1st Monday of each month.

Proposed new sub-projects

Distribution and Meta-Packaging Validation and Test suites.


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Distribution and Meta-Packaging

Interoperable distribution and configuration utilities identified as a definite need by all the recent trans-atlantic

demonstration and validation work.

EDG uses RPMs as the packaging standard and LCFG as the distribution tool.

VDT uses PACMAN as a meta-packaging and distribution tool which can support RPMs, Tar files, GPT

packaging etc.

VDT includes some RPMs from EDG releases. DataTAG supporting pacman for interoperability needs.

For the IST/SC demos products will be supported as RPMs and through pacman as needed.

Support for this group comes from:

EDG technical management (Bob Jones), Trillium WP4 manager (Olof Baring), LCG DataTAG All these projects would contribute to the work of the group.

Proposal (agreed by DataTAG WP4, iVDGL interoperability and line managements) is that co-chairs are Flavia

Donno - LCG and Alain Roy - VDT. Members to include Olof, Saul, ..


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Validation and Test Suites

Current status:

LCG hired a Validation and Test manager as part of the Grid Deployment area. EDG extending test, regression and validation tests in collaboration with LCG Globus-iVDGL test harness developed as part of GLUE VDT test scripts

LCG 1.0 includes validation of accepted/deployed middleware.

GLUE project proposal states that will hand ongoing responsibility of interoperability to grid

middleware projects - EDG, VDT.

Proposal is to initiate a collaborative project in this area between LCG, VDT, and EDG under the

umbrella of the JTB.


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GLUE - Overview

Glue is currently managed and mainly staffed by the 2 projects with interoperability in their deliverables:

DataTAG WP4 and iVDGL. goals, scope and deliverables V0.1.2 posted in June http://www.hicb.org/glue/glue-v0.1.2.doc and

referred to in Edinburgh. Stage I:

Phase 1: in test and incorporation in software releases. Phase 2: ~30% done. need to address new components: RLS, job scheduler to take in to account

Data Distribution

Phase 3: (authorization, data handling, packaging) Discussions and collaboration started

V0.1.3 (Oct 11th) edits from Antonia (EDT WP4 manager). Introduces start of goals for GLUE Stage II;

Interoperability of the next releases of DataGRID and VDT. More effort on interoperability between the users and the Grid as a collection of different grid

domains.

Interoperability between users and grid includes job descriptions, job monitoring, datalocalization, quality of service specification

Nee Any Glue code, configuration and documents developed will be deployed and supportedthrough EDG and VDT release structure

Once interoperability demonstrated and part of the ongoing culture of global grid middleware projects Glue

should not be needed.
http://www.hicb.org/glue/glue-v0.1.3.dochttp://www.hicb.org/glue/glue-v0.1.3.doc


7/369/19/2014 R.Pordes,Fermilab 7

Reminder of nature of EDG and VDT ReleasesEDG Releases are the collected tagged and supported

set of middleware and application software packages

and procedures from the European DataGrid project

available as RPMs with a master location.

Includes Application Software fordeployment and testing on EDG sites

Most deployment expects most/all packagesto be installed with small set of uniform

configuration.

Well developed mechanisms for softwareinstallation, validation and release.

Includes rebuilt and configured Globussoftware with a few modifications.

VDT - Virtual Data Toolkit - Releases are the

collected tagged and supported set of middleware and

common utilities from the US Physics Grid Projects

(GriPhyN, iVDGL, PPDG) . VDT scope is currentless than that of the EDG:

Does not today include collective andhigher level services such as User

Interfaces, Storage Management.

Configuration Procedures less evolved Meta-packaging and distribution

mechanisms follow component model.

Uses published releases of Globus asBinaries + versioned experimental patches

if needed.

EDG and VDT: base layer of software/protocols were/are same:

GLOBUS :X509 certificates,; GSI Authentication; GridFTP MDS LDAP based monitoring and resourcediscovery framework GRAM job submission protocol and interface.

Authorization: LDAP VO service

CONDOR: Matchmaking (classAds); Grid Job Scheduling ; Planning Language (dagman)

File Movement: GDMP; GridFTP

Storage Control Interface SRM



The Glue project - the people involved day to daySergio Andreozzi DataTAG Schema, Glue testbed Carl

KesselmaniVDGL,Globus

Schema

Olof Baring EDG WP4 Schema, Information

providers

Peter

Kunszt

EDG WP2 Schema, Data Movement and

Replication

Rick Cavanaugh GriPhyN,

iVDGL

Applications Doug Olson PPDG Authentication, Authorization

Roberto Cecchini EDG,DataTAG

Authentication,Authorization

Ruth Pordes PPDG,iVDGL

Testbeds, Applications

Vincenzo

Ciaschini

DataTAG Glue testbed, job

submission

David

Rebatto

DataTAG Applications

Ben Clifford iVDGL,Globus

MDS development Alain Roy iVDGL,Condor

Virtual Data Toolkit packaging,support.

Ewa Deelman iVDGL,Globus

Schema, VOOperations

Dane Skow PPDG Authentication, Authorization

LucaDellAgnello

DataTAG Authentication,Authorization

Scott Gose iVDGL,Globus

Testbed operations, Gluevalidation tests

Alan DeSmet PPDG,

Condor

Applications Massimo

Sgaravatto

EDG WP1 Schema, Job Scheduling

Flavia Donno EDG,

DataTAG,LCG

Applications, Job

Submission, dataMovement

Jenny

Schopf

PPDG,

iVDGL,Globus

Schema, Monitoring

Sergio Fantinel DataTAG Applications Arie

Shoshani

PPDG,

LBNL

Storage Interface (SRM)

Enrico Ferro DataTAG Distribution,Applications

FabioSpataro

DataTAG Authentication, Authorization

Rob Gardner iVDGL Applications, Testbed Regina Tam EDG WP5 Schema

JerryGieraltowski

PPDG Applications BrianTierney

PPDG,LBNL

Schema, Monitoring

John Gordon EDG WP5 Storage Schema andServices

LucaVaccarossa

DataTAG Applications

David Groep EDG Authorization CristinaVistoli

DataTAG Schema, Coordination

Leigh Grunhoefer iVDGL Authentication,Testbed

SaulYoussef

iVDGL Software Distribution,Applications



A & A

Authentication further needs:

Automated procedures to disseminate revocation; adddress issues of security of private keys.

Authorization:

LDAP V0 servers + automated generation of gridmapfiles work for now.

Plans to evaluate of EDG 1.2.2. LCAS and VOMS in the US (PPDG-SiteAA, VDT) and for

GT 2.2 CAS testing in the EU.

Need to develop full support for Virtual Organizations - membership of multipleorganizations, dynamic policy based authorization to sub-groups in a VO, Authorizationby service and/or resource etc.

Plan that the PPDG SiteAA project will report status and recommendations for the path PPDG

should take at our December 19th steering meeting in ISI/Caltech.

Would like to invite some European counterparts.

Would like to stimulate some concrete project proposals.

European meeting in December will be attended by US representatives.

(If you can stomach much mail on the subject join the PPDG SiteAA mail list!)



Job Submission

In Place Today: Basic Interoperable Job Submission in both directions between EDGVDT

One can directly submit a job to a GRAM or Computer-Gateway - identifying the locationof the input and output data. This has been tested between EDG and Globus installations using testjobs - Globus test

harness - and application jobs - CMS and ATLAS simulation, D0 analysis.

Initial interoperability tests of dynamic job scheduling have been done in both directionswith CMS MOP between DataTAG CMS testbed nodes and US Florida CMS nodes

Resource Discovery basic interoperability in final test -

the Glue Schema - the structure and attributes of Information loaded into the MDSLDAP database. (for the EDG among us: R-GMA schema are mapped to/from MDSschema.).

Information Providers (static and dynamic) fill values into MDS LDAP schema. Resource Broker/Planning

EDG 1.2 Resource Broker and User Interface have been used on VDT sites and

through Altas-Grappa portal. Available as 3 standalone RPMs and can be included inVDT if need be.

EDG 2.0 Resource Broker and VDT Condor-G negotiator/dagman well aligned.Details of interoperability to be discussed at meeting at Fermilab 18th October.

Chimera discussions at early stage.



Glue Schema

Compute Information - nodes, clusters, jobs: CE V1.0 Schema available

included in VDT 1.1.3 release - separate package during development and testing. adapted EDG resource broker (consumer) in test. WP4 Information Providers in test on glue testbed. MDS Information Providers using Ganglia in test by Globus.

Storage Service Information: SE V1.0 available

will be included in VDT 1.1.3. EDG WP5 Information Providers in progress. Proposal to make separate RPMs of IPs so can be included in future VDT releases.

CE-SE relation for job scheduling: CESEBIND V1.0 available. This basically expresses the

relationship between Storage and Compute resources for use in Planning and Scheduling.

Above Planned for inclusion in EDG November release



Glue Schema cont..

Network Information (NE)about to start. Will be based on common work between IERM-BW

(Les Cottrell/Warren Matthews) work with UK WP7 and PPARC (Richard Hughes Jones,Peter Clarke).

Remaining issues from CE/SE are those of VO and User information. String reference included

in SE but ongoing discussions of what is the correcr approach.

All schema described in UML and implemented in LDIF.

Work remains to

Write policy and user documentation Test with R-GMA for EDG; Continue collaboration with CIM. Meet with Nordugrid to see if they will incorporate Glue Schema in a future release.

The Nordugrid schema currently define Compute Resources and are simpler than theGLUE Schema.



Job Description, User Interfaces and Portals

Interoperability requires that a submitted Job (Data Processing or Analysis Job either from the

command line, program calls or through a graphical interface) may run on any Authorized

resource that provides the requirements - whatever these may be from the User, Application

Infrastructure, VO, and OS.

We would also like Interoperability to mean that the User can be sitting at any site to submit the

job and retrieve the results.

Recent successes:

EDG UI/RB jobs submitted from ATLAS Grappa portal. (requires UI and Grappa web

services on same machine) EDG RB jobs submitted to VDT sites for CMS MOP jobs. VDT site submission of CMS MOP job to EDG RB. Globus Gatekeeper submissions between EDGVDT sites. EDG job submission and RB on CMS VDT machine in US VDT client installation added EDG RB, and JSS and submitted job to testbed

Proposal to look at common User/Application/System Job Description Languages and ideas for

well specified portal services are in early stages



Data Storage and Movement

Disk and Tape Access and Management

Interoperability tests (using GridFTPand SRM V1.0) within the US

between (2 at a time!) Fermilab,

JLAB, LBNL, Wisconsin have

started with some success. It is hoped

that tests with EDG sites can start

soon.

SRM V2 final spec is goal ofDecember workshop at CERN.

No commonality on Posix I/O layer

and semantic access to data. There aremultiple definitions for this in use:

RFIO, DCCP, XIO. This needs to be

looked at as part of the December

workshop.

Data Movement, Management and Access

In place today (EDG,VDT): GridFTP,GDMP - both well tested between

VDT EDT installations.

Experiment Higher level services fordata management and access tested by

the experiment testbeds: MAGDA,ALIEN, REFDB/BOSS, etc etc.

Waiting for RLS frozen release (orlate beta) for GLUE testing to start.



GLUE PHASE I Validation

In Place today: Demonstrations showing interoperability at one time and location:

Component level tests - AA, GRAM, GridFTP, GDMP, MDS two node application test - MOP, ATLAS

In progress for tomorrow: Multi-site application demonstrations with automation in

installation and configuration in progress for November conferences

ATLAS simulation

CMS MOP and Virtual DataNeeded for next year: Ongoing system demonstrations. Formal Validation that needs to be

ideally done for each new release of software and system change

EDG test scripts VDT test harness and scripts

? Need more work here



Intergrid Demonstrations for IST2002 and SC2002 -

WOLRDGRID

Goal is to demonstrate Applications and Test programs operating on a grid of computers and storage

across EU and US sites some of which have EDG 1.2 release installed and some of which haveVDT 1.1.3 installed; including some US sites with EDG and some EU sites with VDT.

Working week run by Rob - iVDGL coordinator - and Flavia - then DataTAG WP4.3/4.4 coordinatorheld at Fermilab 2 weeks ago resulted in much work by all and Experiment Applications allsuccessfully tested standalone.

Since then core team working full time to package, deploy, test, and run demonstrations on as many

WorldGrid nodes as possible:Flavia, Sergio, Sergio, David, Marco, Silvia - DataTAG

Rob, Jorge, Saul, Leigh, Vijay, Alain, Nosa, Scott - iVDGL

Gerry, Dantong, Rich, Alan - PPDG

Will be another working week before IST2002 (4-6 Nov) in Rome.

This is a major effort which is resulting in demonstratable trans-atlantic demos.

WEB site: http://www.ivdgl.org/demo

Mailing list: [email protected]

Archive: http://web.datagrid.cnr.it/hypermail/archivio/igdemo
http://www.ivdgl.org/demohttp://www.ivdgl.org/demo



Demos of Monitoring and Experiment Applications

Monitoring across all sites using:

CMS/GENIUS, ATLAS/GRAPPA, EDG/MAPCENTER (EDG/WP7), iVDGL/GANGLIA, DataTAG/NAGIOS

ATLAS simulation jobs submitted through EDG/JDL and/or GRAPPA portal running on ATLAS-

EDG, ATLAS-VDT and CMS-VDT sites.

CMS simulation jobs submitted with IMPALA/BOSS interfaced to VDT/MOP, EDG/JDL and/orGenius portal.

SDSS and CMS virtual data jobs.

Demo testbed with Common GLUE and EDG schema and authorization/authentication tools

VO (DataTAG and iVDGL) LDAP Servers in EU and US. Identified Repositories with software distribution - DataTAG and iVDGL. Demo testbed with Common GLUE and EDG schema and authorization/authentication

tools.



Grid Middleware: LCG-1, HEPCAL, and GLUE

LCG-1 requires identification and validation of Grid Middleware

by end of 2002

Overall requirements on Grid Technology stated by HEPCALdocument from SC2 RTAG in June.

Detailed response from EDG given in August/Sept; Detailedresponse from US VDT, CMS/ATLAS S&C managers inSept/Oct.

Joint summary from LCG GTA area - Fab, Miron, Ruth, Marcel -

for SC2 in November.

Bottom line reported by me at the grid deployment boardhttp://www.hicb.org/glue/LCG_GDB_100202.ppt is
http://www.hicb.org/glue/LCG_GDB_100202.ppthttp://www.hicb.org/glue/LCG_GDB_100202.ppt



Summary - from GDB

The issue of grid interoperability, grid middleware interoperability, interfacing, protocols and common solutionshas been identified.

There has been signficant progress in terms of understanding and starting to address the technical and political

specifics.

A base interoperating infrastructure which is being tested with existing experiment applications is in place onwhich to build and deploy a first LCG production grid.

There is a recognition that there is still much work remaining to make this base complete in detail and robust inoperation.

Significant problems are being encountered in any end-to-end grid system or testbed deployment and operation.

Fault detection and reporting, diagnosis and troubleshooting will take a lot of manpower and will benefit fromattention to interoperability issues.

Recent EDG slide:Recent Problems: MDS Instabilities: Top problemknock-on problems for users. problems with match making. finding replicas Moved back to manualconfiguration of II. Script used to monitor status of sites.

- Logging & Bookkeeping: Buckled under very large number of simultaneous requests.. Abuse of dg-job-statusall. Can improve with purging database.

- Testing for 1.2.xJob Manager (GASS cache): Rate problem gone when using fork job manager. Bug found with pbs backend scripts. reported to Globus and fixed need to repeat testing Haventconfirmed or denied: EDG GK works with new job manager.. Combination works with WP1 job submission.

- MDS: Dynamically-linked MDS 2.2 works; gross failure modes gone. Statically-linked MDS is not possible because of LDAP. Will need to deploy parallel Globus trees to have this work.

Recent US CMS Testbed 1 day test list of issues:condor-g gahp_server crashing on ramen (fermi), tracked down to globus library bug (globus i/o misusinggram close, or visa-versa)- for unknown reasons, condor-g working on tito (could be b/c of older condor-g from older vdt, could be network/sys c onfig, unknown), so we move there- jobs going on hold, unable to restart -- due to jobmanagers at florida crashing and leaving corrupted state files -- fixed by jaime after many test/debug cycles- some jobs got stuck on old jobmgrs with corrupted state -- we made them start over from scratch by either hacking their contact string in queue, or by removing them and submitting the rescue

DAG- impala's createcmsimjobs no longer recognizes -g option -- solved by backing out to older version- MOP's stage-out still relied on gdmp (i had thought we fixed that a while back) and gdmp is hosed, so we had to make it do an on-demand g-u-c (wrapped in ftsh) like the stage-in stage did- fd's and inodes getting dangerously high on testulix, upped the levels higher- had to upgrade to latest DAR at worker sites (auto-install-from-master script is alleged to no longer work but we didn't try)- impala had references to cmsim125.1 in config files, needed to change them to cmsim125.3- some sites still have local globus/condor config mistakes preventing jobs from running- network outages at UW slowed progress but the software recovered properly- power outages at UW slowed progress but the software recovered properly- worker sites changed during the run (ramen was rebuilt, testulix cluster passwd file corruption, someone accidentally condor_rm'ed jobs on ramen) ausing jobs to be lost and forcing us to useDAGMan rescue files at the master site to re-submit them to MOP- globus job-manager bug where it stops polling/updating job status and constantly reports the same status until killed and restarted by hand- some globus job-managers report unable to find files in GASS cache -- no diagnoses yet, jobs nuked & resubmitted from MOP master site- DAGMan crashed and was unable to recover one small DAG; bug not diagnosed yet, had to be recovered by hand (!)- when DAG was recovered, too many simultaneous publish stages (~25) started at once; they might have completed eventually but to be safe we caused them all and released them five at a timeuntil the finished- zombie globus gatekeeper processes were hanging around on testulix; diagnosed as globus i/o bug but not a show-stopper yet so ignored- zombie globus job-manager proceses were hanging around in testulix; diagnosed as globus i/o bug but not a show-stopper yet so ignored


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9/19/2014 20

European Grid Programme

Update

Fabrizio [email protected]

www.cern.ch/egee-ei
mailto:[email protected]:[email protected]


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21

New EU FP6 Budget overview

ICT RI-Budget in FP5 (to compare): 161m

Additional budget for Grids in other IST areas

300m fo r Gant, Grids , o ther ICT

Research In frastru ctu res in FP6

Geant:80m

Grids:30m Others:41m(including admin.Costs)


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22

Indicative roadmap of calls

1. Budget from Structuring the ERA Programme (200m)

Year 2003 Year 2006Year 2005Year 2004

50m

100m

50m

2. Budget from IST (100m)

Year 2003 Year 2006Year 2005Year 2004

?m ?m


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9/19/2014 23

EGEE initiative Goal

create a general European Gridproduction quality infrastructure

Build on

EU and EU member states majorinvestment in Grid Technology

Several good prototype results

Goal can be achieved for a minimum of100m/4 years on top of the national andregional initiatives

Approach:

Leverage current and plannednational programmes

Work closely with relevant industrialGrid developers and NRNs

Build on existing middeware andexpertise

EGEE

applications

network


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Research challenges include, but are not restricted to:


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ese c c e ges c ude, bu e o es c ed o:

Advancing fundamental research and the technical state of the art of IT andassessing its impacts on other fields of science and engineering, including:

o Extending the capability to process, manage, and communicate

information on a global scale beyond what we imagine today. Thisincludes new paradigms for communication, networking and data

processing in large-scale, complex systems.

o Understanding how to extend, or scale up, the network infrastructure toinclude an extremely large number of computing and monitoring systems,embedded devices and appliances.

o Exploring new research directions and technical developments to enable

wide deployment of pervasive IT through new classes of ubiquitous

applications and creation of new ways for knowledge acquisition andmanagement.

o Exploiting the power of IT and networking infrastructures to enable robustsecure and reliable delivery of critical information and services anytime,anywhere, on any device.

Expanding our capacity to respond through IT to new opportunities and to lowerthe lag time between concept and implementation. This includes work directly

focused on education, workforce, and productivity issues as well as scientific andengineering research.

Providing new computational, simulation, and data-analysis methods and tools tomodel physical, biological, social, behavioral, and mathematical phenomena. This

can include the creation of novel hardware, the development of computationaltheory and paradigms coupled with research on a target application, or theenabling of distributed, dynamic data-driven applications and data-intensive

computing.


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HEP Data GRID in Asia

Yoshiyuki Watase

Computing Research Center

KEK

HICB/GGF5 Chicago

13 Oct. 2002


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Outline

Network Infrastrucutre

GRID Activities Korea

China

Taiwan

Japan

Possible collaboration

Conclusion


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Network Infrastructure

NII- NY

TRANSPAC

Taiwan-US

Japan NII) -NY : 2.4G x 2 Jan. 2003

Japan US: 622M x 2 TRANSPAC)

Korea US: 45 M

Korea Japan: 2.4G Jan. 2003

China IHEP) Japan KEK): 128 kbps HEP)

China US: 10 M

Taiwan Japan: 155 M

Taiwan US: 622 M Dec. 2002)

TEIN


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2014/9/19 29

Asia-Pacific Advanced Network:APAN (May 02)


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GRID Activities at Korea

People at

CHEP:Center for HEP at Kyungpook N U

Universities: Soul N U, Yonsei U, Korea U Donchil Sun (CHEP/KNU)

Experiments

LHC/CMS, AMS, HERA/ZEUS

CDF, RHIC/PHENIX

KEKB/Belle, K2K

Testbeds for EU DataGRID, iVDGL

Working Grid enviornment at CHEP/KNU - SNU

Network

to US APII/APAN 45 Mbps

to EU TEIN 2Mbps -> 20 Mbps

to JP APII/APAN 8 MbpsGENKAI Project 1 Gbps (Jan. 2003)


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GRID Activities at China

People at

IHEP(Beijing), Univ. s

Chuansong Yu(IHEP) Experiments

LHC/CMS, Atlas

BES(Beijing Spectrometer)

Testbed under preparation

32 x 2 PC farms+ RAID + Tape( with CATOR)

Grid environment test within site

Network

HEP dedicated line to KEK 128kbps -> 2


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GRID Activities at Taiwan

People at Natl Taiwan U, Natl Central U, Acadmia Sinica

Ping Yeh(NTU), Simon Lin(AS) Experiments

LHC/CMS(NTU, NCU), Atlas(AS)

CDF(AS)

Testbed Comp. Center at AS

Network to US 622Mbps (Dec. 2002)

to JP APAN 155Mbps


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GRID Activities at Japan

People at

KEK, ICEPP(U. Tokyo), Titech, AIST(Tsukuba)

Experiments

LHC/Atlas, KEKB/Belle

CDF

Testbeds

for Atlas ICEPP(U Tokyo)KEK

for Gfarm KEK- TitechAIST


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R&D in Japan

Gfarm Development by AIST, Titech, KEK

Architecture PC farm with large local disk/node

Large data file is divided into fragments and stored in thedisks by read-in

Data file integrity is managed by the Gfarm metadata DB

Data I/O by parallel file system

Affirmative process scheduling for data residence

Service daemon process: gfd is running at each node

Authentication by GSI


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National

Backbone

National

Backbone

Super

SINET

Super

SINET

Cluster and Network setting for SC2002 Bandwidth Challenge (9/3)

SCinet

NOC

3com 4924

10 Gbps

By courtesy of

Force10

SC2002, Baltimore

Indiana Univ.

Cluster

SDSC

Cluster

Indianapolis

GigaPoP

NOC

Tokyo

NOC

OC-12 x 2

Japan

TransPAC

KEK

Cluster

Titech

Cluster

AIST

Cluster

ICEPP

Cluster

AIST

M160

Tsukuba-U

Maffin

M160

GbE

10 GbE

GbE

Star Light

Pacif ic NW Gigapop

GbE

NOC

AIST

BoothAlternative

Tsukuba WAN

Abilene

GbE -> ?10-12 nodes

5 TB, 1 GB/s

HP4000

15 nodes

180 GB4-6 nodes2 TB, 400 MB/s

Abilene

Gfarm Demonstration at SC2002Data transfer, data replication over transoceanic network


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Conclusions

Grid activities are starting in each country

Testing between a few institutes International test: for LHC/Atlas, CMS in 2003

Possible collaboration for KEKB/Belle

KEKKorea KEKTaiwan

Network is emerging for heavy application users.

Testbed in collaboration with CS people

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