Masaki hirabaru masaki@crl go jp crl japan
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Common Performance Measurement Platform. APAN Engineering Team Meeting APAN 2003 in Busan, Korea August 27, 2003. Masaki Hirabaru <[email protected]> CRL, Japan. Motivations. MIT Haystack – CRL Kashima e-VLBI Experiment on August 27, 2003 to measure UT1-UTC in 24 hours

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Masaki Hirabaru CRL, Japan

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Masaki hirabaru masaki@crl go jp crl japan

Common Performance Measurement Platform

APAN Engineering Team Meeting

APAN 2003 in Busan, KoreaAugust 27, 2003

Masaki Hirabaru

<[email protected]>

CRL, Japan


Motivations

Motivations

  • MIT Haystack – CRL Kashima e-VLBI Experiment on August 27, 2003 to measure UT1-UTC in 24 hours

    • 41.54 GB CRL => MIT 107 Mbps (~50 mins) 41.54 GB MIT => CRL 44.6 Mbps (~120 mins)

    • RTT ~220 ms, UDP throughput 300-400 MbpsHowever TCP ~6-8 Mbps (per session, tuned)

    • BBFTP with 5 x 10 TCP sessions to gain performance

  • HUT – CRL Kashima Gigabit VLBI Experiment

    • -RTT ~325 ms, UDP throughput ~70 MbpsHowever TCP ~2 Mbps (as is), ~10 Mbps (tuned)

    • -Netants (5 TCP sessions with ftp stream restart extension)

They need high-speed / real-time / reliable / long-haul high performance data transfer.


Purpose

Purpose

  • Ensure >1 Gbps end-to-end performance in high bandwidth-delay product networks

    • to support for networked science applications

    • to help operations in finding a bottleneck

    • to evaluate advanced transport protocols (e.g. Tsunami, SABUL, HSTCP, FAST, XCP, ikob)


Masaki hirabaru masaki crl go jp crl japan

Seoul XP

10G

Korea

Kashima

Daejon

HUT

KOREN

0.1G

Taegu

Tokyo XP

2.5G

Helsinki

Kwangju

0.1G?

Busan

Koganei

Stockholm

funet

1Gx2

2.4G

1G

250km

Nordunet

2.4G

2.5G SONET

TransPAC

0.6G

GEANT

APII/JGN

7,000km

2.5G + 1G x2

2.4G

Kitakyushu

1,000km

Cicago

MIT Haystack

1Gx2

0.6G

10,000km

Fukuoka

Abilene

1G

Genkai XP

Fukuoka Japan

4,000km

QGPOP

Los Angeles

New York

10G


Proposal

Proposal

  • Place a good PC box for performance measurement at each NOC / POP as well as experiment sites (hop-by-hop and end-to-end)

  • Advanced rate-based / window-based transports (kernel may be modified)

  • Common measurement method / tool (iperf?)

  • Monitor for TCP / UDP protocol behavior (tcpdump & tcptrace)

  • Combine with ping, traceroute, routing stats

  • Share the boxes and develop scheduler to avoid duplicate tests

  • Need a consensus to put a strong pressure on our networks (?)


Questions

Questions?

  • See http://www2.crl.go.jp/ka/radioastro/index.htmlfor VLBI


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