WWW.KISTI.RE.KRWWW.KISTI.RE.KR WWW.KREONET.RE.KRWWW.KREONET.RE.KR

SUPERCOMPUTING CENTERSUPERCOMPUTING CENTERKISTIKISTIMIN KI NOHMIN KI NOH

E2E performance measurementIn KREONET

2005.1.27

CONTENTSCONTENTS

1.1. KREONET INTRODUCTIONKREONET INTRODUCTION

2. E2E N/W PERFORMANCE MEASUREMET2. E2E N/W PERFORMANCE MEASUREMET - AMP( Active Measurement Program)- AMP( Active Measurement Program) - NDT - NDT - FlowScan- FlowScan - Network Performance Tester- Network Performance Tester

KREONET NETWORK BACKBONEKREONET NETWORK BACKBONE

- KREONET (Korea Research Environment Open Network) is a R&D network of Korea supported by Korean government.

- KREONET member are Currently over 200 organizations (research institutes, universities, industrial, research laboratories)

- KREONET has 12 regional network centers & NOC in Daejeon, KISTI

- Major Network Services are IPv4/IPv6 Unicast Routing, Multicast routing, Lambda networking, QoS Service, TE..

- Major S&T resource service with KREONET are National Supercomputing Center TeraCluster(512CPU) S&T DB Service Advanced Experimental Facilities

INTERNATINAL LINKSINTERNATINAL LINKS

: USA NetworkPeering Point : ITRC : Circuit Matching/Landing Point

Seoul(Dacom ITMC)

Daejeon

Chicago

Seattle

Bandon

Morro Bay

Sacramento(MCI ITMC)

1.2Gbps

155KMbps

622Mbps

1.2Gbps

155Mbps

155MbpsBEIJING

CSTNetStarLight

155Mbps

: China NetworkPeering Point

- First Peer to North America connect with STAR TAP , 45Mbps - STAR TAP peer change to StarLight & upgrade to Optical network (1.2Gbps) - Interconnect to APAN pass through KOREN 1Gbps - New Peer KREONET(Korea)/CSTNet(China) -> 310Mbps

KREONET/STARLIGHT (2004) KREONET/STARTAP(2003) KREONET/CHINA(2004)

AMPAMP

AMP data after KREONET Backbone upgrade

Before After

• Since 2001, AMP Server has operate and service for measuring backbone network performance.

• Major AMP service is for monitoring backbone network performance among domestic regional centers (AMP give us Full mash performance data is so useful for NOC!)

• Currently 11 of AMP Client has Operate and service.

(AMP server located in NOC) • URL: http://amp.kreonet2.net• We usefully used AMP data when

had finished KREONET backbone upgrade work (It show us How improve Network performance after change to optical network)

Regional Center

Regional Center

Regional Center

Regional Center

NDTNDT

• 11 org. provide with Computational resource for big calculation on Grid environment.

• NDT is service for GRID researchers (e2e network performance is so importa

nt for grid & need system interface tuning)

• NDT Server implemented in Grid Cluster & Supercomputer Domain in KISTI

(Service useful information to other cluster & supercomputer domain)

• It useful when we have test 13 of application Performance on Grid environment.

(KISTI- Kunkook University)• URL: http://noc.grid-kr.org

KISTI

SCU

JBU

PNU

MJU

KumHo

SNU

POSTECH

POSTECH

IBM p630

SGI Origin

16 nodes cluster

IBM SP2 16 nodes cluster

HP v2500

SGI Origin

16 nodes cluster

16 nodes clusterTMUIBM SP2

KISTI16 nodes cluster

NDT ServerIn KISTI Cluster Domain

Performance measure to NDT server

Performance measure to NDT server

Performance measure to NDT server

Network Performance TesterNetwork Performance Tester

AGENT1

AGENT2

SLA SERVER

http://sla.kreonet2.net

netloger

netloger

monitor

monitor

IPv6,IPv4TCP/UDP

IPv6,IPv4TCP/UDP

• TCP Performance Measure-Measure bandwidth (Max. throughput) -Report MSS/MTU size and observed read sizes. -TCP window size control for performance tuning

UDP Performance Measure-send/receive UDP streams-packet loss/delay/jitter

• Based on Iperf 1.64 • easy measure with only Agent install & Web UI• Sender will be Client receiver will be Server• OS : Linux Debian Package & Perl 5.61 above • System : Pentium 550Mhz, 128Mb RAM)• Service URL : http://sla.kreonet2.net

STEP 1. Configure STEP2. Realtime Monitor

STEP3. Test Result

Network Performance Tester (Cont.)Network Performance Tester (Cont.)

FlowScan+FlowScan+

• We need information about what flow our network.

• FlowScan is a passive measurement tool drawing traffic graphs by analyzing network flows exported by routers and switches– NetFlow is exported CISCO rou

ters and switches

• FlowScan+ is improved by adding MySQL, and have a function query interface to get flow information analyzing flow data (IP, top user, flow type)

• http://Flowscan.kreonet2.net

Thank you!

mknoh@kisti.re.krhttp://noc.kreonet2.net