EXPReS SA1: at the half-way mark. Arpad Szomoru JIVE

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "EXPReS SA1: at the half-way mark. Arpad Szomoru JIVE"

Transcription

1 EXPReS SA1: at the half-way mark Arpad Szomoru JIVE

2 Outline Progress in 2007 Going intercontinental The next 18 months Slide #2

3 e-vlbi science/test runs 17 e-vlbi science projects accepted since 2006: 2 failed (in early 2006) 8 active binary systems (Algol-type, X-ray or gamma-ray binaries); 4 of these were ToO projects, 3 part of multi-wavelength campaign 1 adaptive observation of 16 X-ray binaries (no detections..) 4 determination of compactness of calibrator or target 1 spectral line run 1 supernova ToO Rapid access to EVN provides clear benefit to users (important for calibrator/multi-wavelength projects) Follow-up observations of bursting transients were only a moderate success in 2006; two weeks delay between proposal submission and observations is too long e-vbli observing policy was changed in early 2007, to allow quick response to triggered projects (in 24 hours). Slide #3

4 e-vlbi: operational improvements Overall improvement in first 18 months: Robustness Reliability Speed Ease of operation Station feedback Minimizing data loss by careful scheduling Increase of production data rate from 128 Mbps to 256 Mbps 6-station fringes at 512 mbps Inclusion of Metsähovi and Medicina telescopes First successes with Shanghai and Australian telescopes, Arecibo and TIGO Slide #4

5 e-vlbi results Slide #5

6 Sharply reduced time to publication Data processing took 1-2 weeks with first images within 48 hours Publication took less than 2 months Slide #6

7 e-vlbi: data rate improvements Number of data rate Data rate (Mbps) Aggregate data rate Aug-04 Feb-05 Sep-05 Mar-06 Oct-06 Apr-07 Nov-07 Jun Data rate (Mbps) Jun-03 Jan Apr-04 Sep-04 May-05 Sep-05 Oct-05 Nov-05 May-06 Aug-06 Dec-06 Feb-07 Jun-07 Slide #7

8 The EVN MarkIV correlator Custom-made hardware, ~ lines of C++ code Designed and built on tape technology, only recently adapted for disk-based recording Slide #8

9 Work packages Standard e-vlbi correlator mode: Wall-clock time vs ROT Centralized control Rapid response/too functionality: Real-time monitoring/feedback/analysis On-the-fly adjustment of observational/correlator parameters Improved amplitude calibration Data transport issues Lightpaths: guaranteed (high) bandwidth Transport protocols (modified TCP, UDP-based, VSI-e ) Hardware issues New control computers (reliability, speed) Replacement of SUs (cause of much misery) Networking hardware (router, interfaces) Slide #9

10 Hardware New control computers Solaris AMD servers, redundant power supplies Interchangeable for maximum reliability Cut down dramatically on (re-)start time Removal of single points of failure Mark5 upgrade Original Mark5s woefully under-powered (Pentium PIII ) New dual processor motherboards, memory, power supplies Immediate result: Mc and Tr sustain 512 Mbps Mark5A B: new streamstor cards, new serial links (optical and coax), Correlator Interface Boards Elimination of Station Units, VSI compliance Slide #10

11 Upgrade of network at JIVE Slide #11

12 Tools for feedback and streamlining Public Status Rapid feedback Streamlined processing Adaptive observing Slide #12

13 The road to China. Slide #13

14 The APAN demo challenges Australian telescopes EXPReS demo only planned for October Need for physical bandwidth Data format conversion, playback at correlator LBADR interface Suitable transport protocol? Chinese telescopes Only Shanghai available Still no Mark5A with Linux 2.6 kernel, Reno TCP not an option, no working UDP-Mark5A European telescopes Torun willing, but under maintenance Medicina willing, but only formatter data UK possibly one dish Westerbork one dish Slide #14

15 e-vlbi to China Connection Sheshan (near Shanghai) JIVE (via HongKong, Chicago). RTT 360 ms, real distance 8800 km, path length km Slide #15

16 e-vlbi to China: Connectivity tests Sheshan-JIVE In practice: a sizzling 22 Mbps Slide #16

17 Hacking time Investigation by Harro Verkouter of UDP on Mark5A After discussions with Richard Hughes-Jones and Simon Casey, realization that serious hacking was needed Extra-simple UDP variation, inspired by vlbi-udp: no replacement of missing data, out-of-order packets are chucked out Has saved the Chinese part of the APAN demo Simon is catching up now Slide #17

18 And other solutions Home-grown version of Circuit TCP (Mudambi, Zheng and Veeraraghavan), made by Mark Kettenis using pluggable TCP congestion avoidance algorithms After additional debugging by Chris Phillips, 512 Mbps over lightpath from Australia, 256 over production network On-the-fly data conversion, playback on Mark5A+ (by Chris and Mark) LBADR correlator interface Three different protocols used in demo Slide #18

19 The results.. Slide #19

20 China: e-vlbi and (network )politics ORIENT: 2.5 G TEIN2: 622 M 155 M 100 M 32 M 34 M 2.5 G 50 M 1G 1G 2.5 G 622 M HKOEP SURFnet Slide #20

21 1 Gbps 2.5 Gbps 10 Gbps 155 Mbps

22 SA1: the next 18 months Main focus: Adaptive scheduling Increasing the operational data rate Improving flexibility and robustness of correlation New telescopes Enabling mixed-mode operations Inclusion of emerlin telescopes Slide #22

23 Specific tasks Crucial: fast/adaptive (re-)scheduling Transform EVN into a truly flexible instrument Reaction time of hours Remote control of widely different telescope control systems Safeguard local operational constraints hard/software upgrade Phase out aging Station Units, main cause of operational instability VSI compliance Slide #23

24 Fine-tuning of deliverables Use of WSRT synthesis data for e-vlbi calibration (absolute flux calibration, polarization calibration, source selection) Space craft tracking correlator mode On-the-fly fringe fitting Real-time download and extraction of station information Automated correlator diagnostics Removing/adding stations from the correlation process on the fly Investigating a 1024M sub-array Slide #24

25 Connectivity improvements: Work toward stable UDP solution on Mark5 Increase granularity of data streams to optimize utilization of available bandwidth Increase of sensitivity and resolution through addition of telescopes: Effelsberg, Yebes, Shanghai Improving global connectivity: South-America, Puerto Rico, China, Australia Slide #25

26 Global connectivity: Arecibo: recent UDP tests yield sustained 64 Mbps. New submarine cable facilities (bypassing Abilene) in near future Australia: 4 LBA telescopes connected at 1 Gbps, one 1Gbps lightpath from Sydney to JIVE. AARNET will provide a total of three 1-Gbps lightpaths for demo in October (3 * 512 Mbps to JIVE) TIGO: 64 Mbps UDP sustained with data generator South Africa: local situation improving, connection to Europe remains problematic Slide #26

27 e-vlbi Slide #27

PoS(EXPReS09)023. e-evn progress. 3 years of EXPReS. Arpad Szomoru 1

PoS(EXPReS09)023. e-evn progress. 3 years of EXPReS. Arpad Szomoru 1 3 years of EXPReS 1 Joint Institute for VLBI in Europe P.O. Box 2, 7990 AA Dwingeloo, The Netherlands E-mail: szomoru@jive.nl During the past years e-vlbi has undergone a remarkable development. At the

More information

Grid Integration of Future Arrays of Broadband Radio Telescopes moving towards e-vlbi

Grid Integration of Future Arrays of Broadband Radio Telescopes moving towards e-vlbi Grid Integration of Future Arrays of Broadband Radio Telescopes moving towards e-vlbi Marcin Okoń Poznań Supercomputing and Networking Center, Supercomputing Department INGRID 2007 S. Margherita Ligure,

More information

Trans-Atlantic UDP and TCP network tests

Trans-Atlantic UDP and TCP network tests , Paul Burgess, Richard Hughes-Jones, Stephen Kershaw, Ralph Spencer and Matthew Strong The University of Manchester Jodrell Bank Observatory Macclesfield Cheshire SK11 9DL UK E-mail: Anthony.Rushton@postgrad.manchester.ac.uk

More information

High bandwidth, Long distance. Where is my throughput? Robin Tasker CCLRC, Daresbury Laboratory, UK

High bandwidth, Long distance. Where is my throughput? Robin Tasker CCLRC, Daresbury Laboratory, UK High bandwidth, Long distance. Where is my throughput? Robin Tasker CCLRC, Daresbury Laboratory, UK [r.tasker@dl.ac.uk] DataTAG is a project sponsored by the European Commission - EU Grant IST-2001-32459

More information

E-VLBI Development in NICT

E-VLBI Development in NICT E-VLBI Development in NICT E-VLBI Activity in NICT E-VLBI Project JGN2 Sympo07 Demo: real-time e-vlbi with Haystack Realtime e-vlbi(kashima,tsukuba,gifu,yamaguchi,usuda) Ultra-rapid UT1 measurement (Onsala,Tsukuba,Metsahovi)

More information

Guifré Molera, J. Ritakari & J. Wagner Metsähovi Radio Observatory, TKK - Finland

Guifré Molera, J. Ritakari & J. Wagner Metsähovi Radio Observatory, TKK - Finland European 4-Gbps VLBI and evlbi Click to edit Master subtitle style Guifré Molera, J. Ritakari & J. Wagner Observatory, TKK - Finland 1 Outline Introduction Goals for 4 Gbps Testing Results Product Conclusions

More information

Mark 6: design and status update

Mark 6: design and status update VLBI Technical Meeting MIT Haystack Observatory 2012.10.23 Roger Cappallo Alan Whitney Chet Ruszczyk Mark 6: design and status update Why Mark6? drivers for everincreasing datarates Sensitivity! VLBI2010

More information

Long Baseline Array Status

Long Baseline Array Status Long Baseline Array Status Cormac Reynolds, Chris Phillips + LBA Team 19 November 2015 CSIRO ASTRONOMY & SPACE SCIENCE LBA LBA VLBI array operated by CSIRO University of Tasmania, Auckland University of

More information

EXPReS Express e-vlbi Service List of contents

EXPReS Express e-vlbi Service List of contents Proposal full title Express e-vlbi Service Proposal acronym EXPReS List of contents Page number 1 OVERVIEW Table 1 - List of participants of I3.... Table 2 - List of activities of I3... Table 3 - Summary

More information

VLBI Participation in Next Generation Network Development

VLBI Participation in Next Generation Network Development VLBI Participation in Next Generation Network Development evlbi Workshop Haystack Observatory 9 th April 2002 Steve Parsley parsley@jive.nl Agenda evlbi Network requirements Existing networks and future

More information

(a) Figure 1: Inter-packet gaps between data packets. (b)

(a) Figure 1: Inter-packet gaps between data packets. (b) Performance Evaluation of Transport Protocols for Internet-Based Teleoperation Systems Jae-young Lee, Shahram Payandeh, and Ljiljana Trajković Simon Fraser University Vancouver, British Columbia Canada

More information

Rapid Turn Around EOP Measurements by VLBI over the Internet

Rapid Turn Around EOP Measurements by VLBI over the Internet Rapid Turn Around EOP Measurements by VLBI over the Internet Yasuhiro Koyama, Tetsuro Kondo, and Hiro Osaki Kashima Space Research Center, Communications Research Laboratory, 893-1 Hirai, Kashima, Ibaraki

More information

APAN Global Collaboration Linking the World with Light

APAN Global Collaboration Linking the World with Light APAN Global Collaboration Linking the World with Light 1 Andrew Howard Coordinating Engineer Advanced Communications Services and International Development Massive increase in International connectivity

More information

AutoBAHN Provisioning guaranteed capacity circuits across networks

AutoBAHN Provisioning guaranteed capacity circuits across networks AutoBAHN Provisioning guaranteed capacity circuits across networks Afrodite Sevasti, GRNET 1 st End-to-end workshop: Establishing lightpaths 1-2 December 2008, TERENA, Amsterdam AutoBAHN is a research

More information

AdMob Mobile Metrics. Metrics Highlights. May 2010

AdMob Mobile Metrics. Metrics Highlights. May 2010 AdMob Mobile Metrics Metrics Highlights May 2010 Metrics Highlights Summary While mobile Internet requests are growing rapidly worldwide, there are regional differences in the devices used 92 countries

More information

ADDENDUM #2 TO REQUEST FOR PROPOSAL (RFP) #2252 Institutional Network Service, Data Center Co-location Service, and High-Speed Internet Service

ADDENDUM #2 TO REQUEST FOR PROPOSAL (RFP) #2252 Institutional Network Service, Data Center Co-location Service, and High-Speed Internet Service CITY OF CONCORD, CALIFORNIA March 13, 2013 ADDENDUM #2 TO REQUEST FOR PROPOSAL (RFP) #2252 Institutional Network Service, Data Center Co-location Service, and High-Speed Internet Service NOTICE TO PROPOSERS

More information

HPE Security Data Security. HPE SecureData. Product Lifecycle Status. End of Support Dates. Date: April 20, 2017 Version:

HPE Security Data Security. HPE SecureData. Product Lifecycle Status. End of Support Dates. Date: April 20, 2017 Version: HPE Security Data Security HPE SecureData Product Lifecycle Status End of Support Dates Date: April 20, 2017 Version: 1704-1 Table of Contents Table of Contents... 2 Introduction... 3 HPE SecureData Appliance...

More information

Data Intensive Science Impact on Networks

Data Intensive Science Impact on Networks Data Intensive Science Impact on Networks Eli Dart, Network Engineer ESnet Network Engineering g Group IEEE Bandwidth Assessment Ad Hoc December 13, 2011 Outline Data intensive science examples Collaboration

More information

Assignment 7: TCP and Congestion Control Due the week of October 29/30, 2015

Assignment 7: TCP and Congestion Control Due the week of October 29/30, 2015 Assignment 7: TCP and Congestion Control Due the week of October 29/30, 2015 I d like to complete our exploration of TCP by taking a close look at the topic of congestion control in TCP. To prepare for

More information

CDMA in Latin America, the present and the future Latin America Conference São Paulo April 17, 2002

CDMA in Latin America, the present and the future Latin America Conference São Paulo April 17, 2002 CDMA in Latin America, the present and the future 2002 Latin America Conference São Paulo April 17, 2002 CDMA today and tomorrow 2 In five years, CDMA has grown to reached over 111 million subscribers

More information

Traffic Types and Growth in Backbone Networks

Traffic Types and Growth in Backbone Networks Traffic Types and Growth in Backbone Networks Alexandre Gerber, Robert Doverspike AT&T Labs Research Outline Overview of a US carrier inter-city backbone optical network: Services running on ROADMs Breakdown

More information

Wide-Area Reliability Monitoring and Visualization Tools

Wide-Area Reliability Monitoring and Visualization Tools OE Visualization and Controls Peer Review Wide-Area Reliability Monitoring and Visualization Tools Carlos Martinez CERTS - Electric Power Group 21 October 2008 Washington, D.C. Presentation Outline Research

More information

Q23-5 In a network, the size of the receive window is 1 packet. Which of the follow-ing protocols is being used by the network?

Q23-5 In a network, the size of the receive window is 1 packet. Which of the follow-ing protocols is being used by the network? CS368: Exercise 5 Q23-5 In a network, the size of the receive window is 1 packet. Which of the follow-ing protocols is being used by the network? a) Stop_and_Wait b) Go-Back-N c) Selective-Repeat Q23-6.

More information

WHOIS Accuracy Reporting System (ARS): Phase 2 Cycle 1 Results Webinar 12 January ICANN GDD Operations NORC at the University of Chicago

WHOIS Accuracy Reporting System (ARS): Phase 2 Cycle 1 Results Webinar 12 January ICANN GDD Operations NORC at the University of Chicago WHOIS Accuracy Reporting System (ARS): Phase 2 Cycle 1 Results Webinar 12 January 2016 ICANN GDD Operations NORC at the University of Chicago Webinar Agenda 1 2 3 WHOIS ARS Background Phase 2 Cycle 1:

More information

Monthly SEO Report. Example Client 16 November 2012 Scott Lawson. Date. Prepared by

Monthly SEO Report. Example Client 16 November 2012 Scott Lawson. Date. Prepared by Date Monthly SEO Report Prepared by Example Client 16 November 212 Scott Lawson Contents Thanks for using TrackPal s automated SEO and Analytics reporting template. Below is a brief explanation of the

More information

New Approaches to Optical Packet Switching in Carrier Networks. Thomas C. McDermott Chiaro Networks Richardson, Texas

New Approaches to Optical Packet Switching in Carrier Networks. Thomas C. McDermott Chiaro Networks Richardson, Texas New Approaches to Optical Packet Switching in Carrier Networks Thomas C. McDermott Chiaro Networks Richardson, Texas Outline Introduction, Vision, Problem statement Approaches to Optical Packet Switching

More information

Polycom Advantage Service Endpoint Utilization Report

Polycom Advantage Service Endpoint Utilization Report Polycom Advantage Service Endpoint Utilization Report ABC Company 3/1/2016-3/31/2016 Polycom, Inc. All rights reserved. SAMPLE REPORT d This report is for demonstration purposes only. Any resemblance to

More information

Making TCP more Robust against Packet Reordering

Making TCP more Robust against Packet Reordering Making TCP more Robust against Packet Reordering Alexander Zimmermann Lennart Schulte TCPM, IETF-9, Honolulu, HI, USA November, 24 TCPM s feedback

More information

GÉANT : e-infrastructure connectivity for the data deluge

GÉANT : e-infrastructure connectivity for the data deluge GÉANT : e-infrastructure connectivity for the data deluge Richard Hughes-Jones, Maria Minaricova & Vincenzo Capone DANTE BioMedBridges Workshop, Hinxton, 15-16 May 2014 What is GÉANT? High-bandwidth, high-performance

More information

Logging Mechanism. Cisco Logging Mechanism

Logging Mechanism. Cisco Logging Mechanism Cisco, page 1 Cisco ISE System Logs, page 2 Configure Remote Syslog Collection Locations, page 7 Cisco ISE Message Codes, page 8 Cisco ISE Message Catalogs, page 8 Debug Logs, page 8 Endpoint Debug Log

More information

Broadband Networks in Asia

Broadband Networks in Asia 2002.9.9v5 Broadband Networks in Asia 2002. 9. 26 Kilnam Chon KAIST http://cosmos.kaist.ac.kr Broadband Internet is Asian Phenomenon ( So is Wireless Internet ) Contents 1. Broadband Networks 2. Current

More information

Tracking the Internet s BGP Table

Tracking the Internet s BGP Table Tracking the Internet s BGP Table Geoff Huston Telstra December 2000 Methodology! The BGP table monitor uses a router at the boundary of AS1221 which has a default-free ebgp routing table 1. Capture the

More information

TCP HACK: TCP Header Checksum Option to improve Performance over Lossy Links

TCP HACK: TCP Header Checksum Option to improve Performance over Lossy Links TCP HACK: TCP Header Checksum Option to improve Performance over Lossy Links R. K. Balan, B. P. Lee, K. R. R. Kumar, L. Jacob, W. K. G. Seah,, A. L. Ananda Centre for Internet Research School of Computing

More information

Computer

Computer 2011-2014 Computer 2014.12. Contents 1. 2011-2013 China Computer Export Trend Analysis... 3 1.1. 2011-2013 China Computer Export Quantity Trend Analysis... 3 1.2. 2011-2013 China Computer Export Amount

More information

Test-Traffic Project Status and Plans

Test-Traffic Project Status and Plans Test-Traffic Project Status and Plans Henk Uijterwaal, Fotis Georgatos, Johann Gutauer, Daniel Karrenberg, René Wilhelm RIPE-NCC New Projects Group RIPE-36, Budapest, May 2000 1 Overview Manpower, Email

More information

App Economy Market analysis for Economic Development

App Economy Market analysis for Economic Development App Economy Market analysis for Economic Development Mustapha Hamza, ISET Com Director mustapha.hamza@isetcom.tn ITU Arab Forum on Future Networks: "Broadband Networks in the Era of App Economy", Tunis

More information

SMARTPHONE LAUNCH CAMPAIGN. Australia 2017

SMARTPHONE LAUNCH CAMPAIGN. Australia 2017 SMARTPHONE LAUNCH CAMPAIGN Australia 2017 Timing is everything Changing landscape Details matter Timing is everything Changing landscape Details matter New device arrivals follow 3 key stages: pre-announcement,

More information

Public Disclosure Copy

Public Disclosure Copy Public Disclosure Authorized AFRICA Western Africa Transport & ICT Global Practice IBRD/IDA Adaptable Program Loan FY 2011 Seq No: 9 ARCHIVED on 03-Feb-2016 ISR21999 Implementing Agencies: Ministry of

More information

Seattle (NWMLS Areas: 140, 380, 385, 390, 700, 701, 705, 710) Summary

Seattle (NWMLS Areas: 140, 380, 385, 390, 700, 701, 705, 710) Summary October, 2016 MTD MARKET UPDATE Data Current Through: October, 2016 (NWMLS Areas: 140, 380, 385, 390,, 701, 705, 710) Summary Active, Pending, & Months Supply of Inventory 4,500 4,000 3,500 4,197 4,128

More information

What you learned so far. Loops & Arrays efficiency for statements while statements. Assignment Plan. Required Reading. Objective 2/3/2018

What you learned so far. Loops & Arrays efficiency for statements while statements. Assignment Plan. Required Reading. Objective 2/3/2018 Loops & Arrays efficiency for statements while statements Hye-Chung Kum Population Informatics Research Group http://pinformatics.org/ License: Data Science in the Health Domain by Hye-Chung Kum is licensed

More information

The UniBoard. a RadioNet FP7 Joint Research Activity. Arpad Szomoru, JIVE

The UniBoard. a RadioNet FP7 Joint Research Activity. Arpad Szomoru, JIVE The UniBoard a RadioNet FP7 Joint Research Activity Arpad Szomoru, JIVE Overview Background, project setup Current state UniBoard as SKA phase 1 correlator/beam former Future: UniBoard 2 The aim Creation

More information

2015 DDoS Attack Trends and 2016 Outlook

2015 DDoS Attack Trends and 2016 Outlook CDNetworks 2015 DDoS Attack Trends and 2016 Outlook 2016, January CDNetworks Security Service Team Table of Contents 1. Introduction... 3 2. Outline... 3 3. DDoS attack trends... 4 4. DDoS attack outlook

More information

More Binary Search Trees AVL Trees. CS300 Data Structures (Fall 2013)

More Binary Search Trees AVL Trees. CS300 Data Structures (Fall 2013) More Binary Search Trees AVL Trees bstdelete if (key not found) return else if (either subtree is empty) { delete the node replacing the parents link with the ptr to the nonempty subtree or NULL if both

More information

Edge versus Host Pacing of TCP Traffic in Small Buffer Networks

Edge versus Host Pacing of TCP Traffic in Small Buffer Networks Edge versus Host Pacing of TCP Traffic in Small Buffer Networks Hassan Habibi Gharakheili 1, Arun Vishwanath 2, Vijay Sivaraman 1 1 University of New South Wales (UNSW), Australia 2 University of Melbourne,

More information

More BSTs & AVL Trees bstdelete

More BSTs & AVL Trees bstdelete More BSTs & AVL Trees bstdelete if (key not found) return else if (either subtree is empty) { delete the node replacing the parents link with the ptr to the nonempty subtree or NULL if both subtrees are

More information

Maximising Search Engine Marketing. Search Marketing and Google Analytics

Maximising Search Engine Marketing. Search Marketing and Google Analytics Maximising Search Engine Marketing Search Marketing and Google Analytics Why Digital Marketing? UK Business Digital Index 2016 52% state cost savings is one of the advantages to being online, a significant

More information

ICT PROFESSIONAL MICROSOFT OFFICE SCHEDULE MIDRAND

ICT PROFESSIONAL MICROSOFT OFFICE SCHEDULE MIDRAND ICT PROFESSIONAL MICROSOFT OFFICE SCHEDULE MIDRAND BYTES PEOPLE SOLUTIONS Bytes Business Park 241 3rd Road Halfway Gardens Midrand Tel: +27 (11) 205-7000 Fax: +27 (11) 205-7110 Email: gauteng.sales@bytes.co.za

More information

TLD-OPS Standing Committee Meeting cctld Security and Stability Together

TLD-OPS Standing Committee Meeting cctld Security and Stability Together Meeting cctld Security and Stability Together October 31, 2017 ICANN60, Abu Dhabi Jacques Latour,.ca (Chair) Agenda TLD-OPS Meeting @ ICANN60, Oct 29, 2017 1. Opening and welcome (Jacques) 2. TLD-OPS introduction

More information

FUJITSU Software Interstage Information Integrator V11

FUJITSU Software Interstage Information Integrator V11 FUJITSU Software V11 An Innovative WAN optimization solution to bring out maximum network performance October, 2013 Fujitsu Limited Contents Overview Key technologies Supported network characteristics

More information

SHARED MESH RESTORATION IN OPTICAL NETWORKS

SHARED MESH RESTORATION IN OPTICAL NETWORKS SHARED MESH RESTORATION IN OPTICAL NETWORKS OFC 2004 Jean-Francois Labourdette, Ph.D. labourdette@ieee.org Page: 2 Outline Introduction Network & Restoration Arch Evolution Mesh Routing & Provisioning

More information

IoT - Next Wave of DDoS? IoT Sourced DDoS Attacks A Focus on Mirai Botnet and Best Practices in DDoS Defense

IoT - Next Wave of DDoS? IoT Sourced DDoS Attacks A Focus on Mirai Botnet and Best Practices in DDoS Defense IoT - Next Wave of DDoS? IoT Sourced DDoS Attacks A Focus on Mirai Botnet and Best Practices in DDoS Defense DDoS Attacks Increasing in Size, Frequency & Complexity Arbor Networks WISR XII Largest attack

More information

Aon Hewitt. Facts & Figures. March 2016 Update. Risk. Reinsurance. Human Resources. Empower Results

Aon Hewitt. Facts & Figures. March 2016 Update. Risk. Reinsurance. Human Resources. Empower Results Aon Hewitt Facts & Figures Risk. Reinsurance. Human Resources. Empower Results Facts & Figures Contents In this document... This button normally prints the whole document. If you want to print just the

More information

The State of the Raven. Jon Warbrick University of Cambridge Computing Service

The State of the Raven. Jon Warbrick University of Cambridge Computing Service The State of the Raven Jon Warbrick University of Cambridge Computing Service jw35@cam.ac.uk Corvus corax Raven photo used under the terms of the GNU Free Documentation License. Author Pcb21. Raven Web

More information

Case Study Core Capabilities in Nuclear Forensics

Case Study Core Capabilities in Nuclear Forensics Nuclear Forensics Workshop, Bangkok, 7 9 December 2011 1 Case Study Core Capabilities in Nuclear Forensics Klaus Mayer Joint Research Centre Institute for Transuranium Elements (ITU) Karlsruhe, Germany

More information

UBS Data Center Efficiency Strategy

UBS Data Center Efficiency Strategy UBS Group Technology Public UBS Data Center Efficiency Strategy Steps in Efficiency, Automation leading to enabling the Cloud October 18, 2011 UBS one of the leading financial firms UBS draws on its 150-year

More information

CIDR. The Life Belt of the Internet 2005/03/11. (C) Herbert Haas

CIDR. The Life Belt of the Internet 2005/03/11. (C) Herbert Haas CIDR The Life Belt of the Internet (C) Herbert Haas 2005/03/11 Early IP Addressings Before 1981 only class A addresses were used Original Internet addresses comprised 32 bits (8 bit net-id = 256 networks)

More information

Past and present of the Linux NVMe driver Christoph Hellwig

Past and present of the Linux NVMe driver Christoph Hellwig Past and present of the Linux NVMe driver Christoph Hellwig 2017 Storage Developer Conference. Insert Your Company Name. All Rights Reserved. 1 A driver.. (from https://www.merriam-webster.com/dictionary/driver)

More information

TCP and BBR. Geoff Huston APNIC. #apricot

TCP and BBR. Geoff Huston APNIC. #apricot TCP and BBR Geoff Huston APNIC The IP Architecture At its heart IP is a datagram network architecture Individual IP packets may be lost, re-ordered, re-timed and even fragmented The IP Architecture At

More information

CS Transport. Outline. Window Flow Control. Window Flow Control

CS Transport. Outline. Window Flow Control. Window Flow Control CS 54 Outline indow Flow Control (Very brief) Review of TCP TCP throughput modeling TCP variants/enhancements Transport Dr. Chan Mun Choon School of Computing, National University of Singapore Oct 6, 005

More information

ACTIAN PRODUCTS by Platform - Vector, Vector in Hadoop as of October 18, 2017

ACTIAN PRODUCTS by Platform - Vector, Vector in Hadoop as of October 18, 2017 ACTIAN PRODUCTS by Platform - Vector, Vector in Hadoop as of October 18, 2017 Platform Product Type Product Product Release LINUX 64-Bit Administration Tools Actian Director Web 2.1 2.1 Administration

More information

All King County Summary Report

All King County Summary Report September, 2016 MTD MARKET UPDATE Data Current Through: September, 2016 18,000 16,000 14,000 12,000 10,000 8,000 6,000 4,000 2,000 0 Active, Pending, & Months Supply of Inventory 15,438 14,537 6.6 6.7

More information

The Conversion Technology Experts. Choosing a Fast Ethernet Media Converter

The Conversion Technology Experts. Choosing a Fast Ethernet Media Converter The Conversion Technology Experts Choosing a Fast Ethernet Media Converter Table of Contents Introduction................................ 3 Extend Distance in a Full-Duplex Environment....... 4 Extend

More information

AC System Monitoring Device. Andrew Jarrett Project Advisor: Professor Gutschlag Department of Electrical and Computer Engineering October 1, 2015

AC System Monitoring Device. Andrew Jarrett Project Advisor: Professor Gutschlag Department of Electrical and Computer Engineering October 1, 2015 AC System Monitoring Device Andrew Jarrett Project Advisor: Professor Gutschlag Department of Electrical and Computer Engineering October 1, 2015 Outline Background Problem Background Problem Statement

More information

International Networking in support of Extremely Large Astronomical Data-centric Operations

International Networking in support of Extremely Large Astronomical Data-centric Operations ADASS 2017 Santiago, Chile October 24 th 2017 International Networking in support of Extremely Large Astronomical Data-centric Operations Jeronimo Bezerra, Jeff Kantor, Sandra Jaque, Luis Corral, Vinicius

More information

TCP and BBR. Geoff Huston APNIC

TCP and BBR. Geoff Huston APNIC TCP and BBR Geoff Huston APNIC Computer Networking is all about moving data The way in which data movement is controlled is a key characteristic of the network architecture The Internet protocol passed

More information

AC System Monitoring Device

AC System Monitoring Device AC System Monitoring Device Andrew Jarrett Project Adviser: Professor Gutschlag Department of Electrical and Computer Engineering October 28, 2015 Executive Summary The alternating current (AC) system

More information

Internet data transfer record between CERN and California. Sylvain Ravot (Caltech) Paolo Moroni (CERN)

Internet data transfer record between CERN and California. Sylvain Ravot (Caltech) Paolo Moroni (CERN) Internet data transfer record between CERN and California Sylvain Ravot (Caltech) Paolo Moroni (CERN) Summary Internet2 Land Speed Record Contest New LSR DataTAG project and network configuration Establishing

More information

Congestion Control for High Bandwidth-delay Product Networks

Congestion Control for High Bandwidth-delay Product Networks Congestion Control for High Bandwidth-delay Product Networks Dina Katabi, Mark Handley, Charlie Rohrs Presented by Chi-Yao Hong Adapted from slides by Dina Katabi CS598pbg Sep. 10, 2009 Trends in the Future

More information

HN/HX System Bandwidth Efficiency

HN/HX System Bandwidth Efficiency HN/HX System Bandwidth Efficiency It is well understood by satellite network operators that bandwidth efficiency for a VSAT system is a critical element in achieving profitability, as higher efficiency

More information

Toward a Reliable Data Transport Architecture for Optical Burst-Switched Networks

Toward a Reliable Data Transport Architecture for Optical Burst-Switched Networks Toward a Reliable Data Transport Architecture for Optical Burst-Switched Networks Dr. Vinod Vokkarane Assistant Professor, Computer and Information Science Co-Director, Advanced Computer Networks Lab University

More information

TCP and BBR. Geoff Huston APNIC

TCP and BBR. Geoff Huston APNIC TCP and BBR Geoff Huston APNIC The IP Architecture At its heart IP is a datagram network architecture Individual IP packets may be lost, re-ordered, re-timed and even fragmented The IP Architecture At

More information

Jobs Resource Utilization as a Metric for Clusters Comparison and Optimization. Slurm User Group Meeting 9-10 October, 2012

Jobs Resource Utilization as a Metric for Clusters Comparison and Optimization. Slurm User Group Meeting 9-10 October, 2012 Jobs Resource Utilization as a Metric for Clusters Comparison and Optimization Joseph Emeras Cristian Ruiz Jean-Marc Vincent Olivier Richard Slurm User Group Meeting 9-10 October, 2012 INRIA - MESCAL Jobs

More information

Integrated Water Resources Science and Services (IWRSS)

Integrated Water Resources Science and Services (IWRSS) TOO MUCH POOR QUALITY TOO LITTLE Integrated Water Resources Science and Services (IWRSS) Collaborative Science, Services and Tools to Support Integrated and Adaptive Water Resources Management April, 2011

More information

Asia Key Economic and Financial Indicators

Asia Key Economic and Financial Indicators Quarterly Yearly Quarterly Quarterly Month-End Quarter-End Monthly (USD) Monthly Monthly Monthly Monthly Interest Daily GDP GDP per BoP CA IR External Debt Import Trade Unemployment IPI PPI CPI Rates*

More information

OpenOnload. Dave Parry VP of Engineering Steve Pope CTO Dave Riddoch Chief Software Architect

OpenOnload. Dave Parry VP of Engineering Steve Pope CTO Dave Riddoch Chief Software Architect OpenOnload Dave Parry VP of Engineering Steve Pope CTO Dave Riddoch Chief Software Architect Copyright 2012 Solarflare Communications, Inc. All Rights Reserved. OpenOnload Acceleration Software Accelerated

More information

Arbor White Paper. DDoS: THE STAKES HAVE CHANGED. HAVE YOU? REVEALED: 3 dangerous myths about DDoS attacks

Arbor White Paper. DDoS: THE STAKES HAVE CHANGED. HAVE YOU? REVEALED: 3 dangerous myths about DDoS attacks Arbor White Paper DDoS: THE STAKES HAVE CHANGED. HAVE YOU? REVEALED: 3 dangerous myths about DDoS attacks The findings of the latest annual Worldwide Infrastructure Security Report (WISR) by Arbor Networks

More information

D.e-Express Introduction of High-Speed Function

D.e-Express Introduction of High-Speed Function D.e-Express Introduction of Function Ver.1.7 TOYOTA DIGITAL CRUISE INC. 1 1. Problem of connection speed from overseas The D.e-Express connection speed can be decreased by distance between locations, or

More information

TCP Revisited CONTACT INFORMATION: phone: fax: web:

TCP Revisited CONTACT INFORMATION: phone: fax: web: TCP Revisited CONTACT INFORMATION: phone: +1.301.527.1629 fax: +1.301.527.1690 email: whitepaper@hsc.com web: www.hsc.com PROPRIETARY NOTICE All rights reserved. This publication and its contents are proprietary

More information

MTAC Visibility and Service Performance Robert Cintron

MTAC Visibility and Service Performance Robert Cintron MTAC Visibility and Service Performance Robert Cintron Moderator January 15, 2014 0 First-Class Mail X: 9:00 10:00 AM 1 Increase Full Service Resolve mailer quality exceptions that prevent mail from entering

More information

First Experience with LCG. Board of Sponsors 3 rd April 2009

First Experience with LCG. Board of Sponsors 3 rd April 2009 First Experience with LCG Operation and the future... CERN openlab Board of Sponsors 3 rd April 2009 Ian Bird LCG Project Leader The LHC Computing Challenge Signal/Noise: 10-9 Data volume High rate * large

More information

CIMA Asia. Interactive Timetable Live Online

CIMA Asia. Interactive Timetable Live Online CIMA Asia Interactive Timetable 2018 Live Online Information version 8 last updated 04/05/18 Please note information and dates are subject to change. Premium Learning Partner 2018 CIMA Cert BA Course Overview

More information

Seattle (NWMLS Areas: 140, 380, 385, 390, 700, 701, 705, 710) Summary

Seattle (NWMLS Areas: 140, 380, 385, 390, 700, 701, 705, 710) Summary September, 2016 MTD MARKET UPDATE Data Current Through: September, 2016 (NWMLS Areas: 140, 380, 385, 390,, 701, 705, 710) Summary Active, Pending, & Months Supply of Inventory 5,000 4,500 4,000 3,500 4,091

More information

Improving Perforce Performance At Research In Motion (RIM)

Improving Perforce Performance At Research In Motion (RIM) Improving Perforce Performance At Research In Motion (RIM) Perforce User Conference il 2008 Tim Barrett 1 Agenda RIM s Environment RIM s Perforce performance problems Project approach and major initiatives

More information

UK EPR GDA PROJECT. Name/Initials Date 30/06/2011 Name/Initials Date 30/06/2011. Resolution Plan Revision History

UK EPR GDA PROJECT. Name/Initials Date 30/06/2011 Name/Initials Date 30/06/2011. Resolution Plan Revision History RP unique number: Page GI-UKEPR-RP-01-RP 0 30/06/2011 1 of 5 Approved for EDF by: A. PETIT Approved for AREVA by: C. WOOLDRIDGE Name/Initials Date 30/06/2011 Name/Initials Date 30/06/2011 Resolution Plan

More information

Computer Network. Direct Link Networks Reliable Transmission. rev /2/2004 1

Computer Network. Direct Link Networks Reliable Transmission. rev /2/2004 1 Computer Network Direct Link Networks Reliable Transmission rev 1.01 24/2/2004 1 Outline Direct link networks (Ch. 2) Encoding Framing Error detection Reliable delivery Media access control Network Adapter

More information

Seattle (NWMLS Areas: 140, 380, 385, 390, 700, 701, 705, 710) Summary

Seattle (NWMLS Areas: 140, 380, 385, 390, 700, 701, 705, 710) Summary November, 2016 MTD MARKET UPDATE Data Current Through: November, 2016 (NWMLS Areas: 140, 380, 385, 390,, 701, 705, 710) Summary 4,000 3,500 3,000 2,500 2,000 1,500 1,000 500 0 Active, Pending, & Months

More information

Chapter 8: Multiplexing

Chapter 8: Multiplexing NET 456 High Speed Networks Chapter 8: Multiplexing Dr. Anis Koubaa Reformatted slides from textbook Data and Computer Communications, Ninth Edition by William Stallings, 1 (c) Pearson Education - Prentice

More information

1.0 PXL-500 Family Controllers

1.0 PXL-500 Family Controllers When adding newer controllers into an access control network with older controllers, certain rules and restrictions apply. This document provides compatibility tables for software, PXL Tiger Controller

More information

Monthly Performance Pack May 2010

Monthly Performance Pack May 2010 1 Monthly Performance Pack May 2010 Dan Maynard, Publicist, BBC iplayer BBC Marketing, Communications & Audiences T. 020 8008 5294 M. 07912 583654 E.Daniel.Maynard@bbc.co.uk Monthly summary May 2010 2

More information

Industrial Data Communications Protocol Training Information and Schedule

Industrial Data Communications Protocol Training Information and Schedule Industrial Data Communications Protocol Training Information and Schedule www.idx.co.za Fast-track! www.idx.co.za Your path to becoming a PROFIBUS expert Enhance skills PROFIBUS System Designer () PROFIBUS

More information

TCP and BBR. Geoff Huston APNIC

TCP and BBR. Geoff Huston APNIC TCP and BBR Geoff Huston APNIC Computer Networking is all about moving data The way in which data movement is controlled is a key characteristic of the network architecture The Internet protocol passed

More information

AdMob Mobile Metrics Report

AdMob Mobile Metrics Report AdMob Mobile Metrics Report AdMob serves ads for more than 15,000 mobile Web sites and applications around the world. AdMob stores and analyzes the data from every ad request, impression, and click and

More information

ASX NET. In Detail: Connectivity Guide

ASX NET. In Detail: Connectivity Guide ASX NET In Detail: Connectivity Guide CONTENTS INTRODUCTION 2 ASX NET SITE REQUIREMENTS 3 ASX NET SERVICES OVERVIEW 4 ASX NET SERVICES IN DETAIL 5 ASX NET NETWORK SERVICES 6 ASX NET GLOBAL OVERVIEW 11

More information

Data Types. 9. Types. a collection of values and the definition of one or more operations that can be performed on those values

Data Types. 9. Types. a collection of values and the definition of one or more operations that can be performed on those values Data Types 1 data type: a collection of values and the definition of one or more operations that can be performed on those values C++ includes a variety of built-in or base data types: short, int, long,

More information

TCP/IP THROUGHPUT ENHANCEMENT FOR GLOBAL IP NETWORKS WITH TRANS-OCEANIC SUBMARINE LINK

TCP/IP THROUGHPUT ENHANCEMENT FOR GLOBAL IP NETWORKS WITH TRANS-OCEANIC SUBMARINE LINK / THROUGHPUT ENHANCEMENT FOR GLOBAL NETWORKS WITH TRANS-OCEANIC SUBMARINE LINK Yohei Hasegawa, Masahiro Jibiki, Tatsuhiro Nakada, Yasushi Hara and Yasuhiro Aoki (NEC Corporation) Email:

More information

Investigating the Use of Synchronized Clocks in TCP Congestion Control

Investigating the Use of Synchronized Clocks in TCP Congestion Control Investigating the Use of Synchronized Clocks in TCP Congestion Control Michele Weigle Dissertation Defense May 14, 2003 Advisor: Kevin Jeffay Research Question Can the use of exact timing information improve

More information

Shared Risk Observing

Shared Risk Observing Shared Risk Observing EVLA Advisory Committee Meeting, March 19-20, 2009 Claire Chandler Deputy AD for Science, NM Ops Motivation Early science: Want to get EVLA science capabilities i into the hands of

More information

Fixed and wireless broadband mapping in Belgium

Fixed and wireless broadband mapping in Belgium Belgian Institute for Postal Services and Telecommunications Fixed and wireless broadband mapping in Belgium Broadband mapping Conference in Warsaw, Poland, 11-12 April, 2016 BIPT Agenda Objectives Roadmap

More information

CS519: Computer Networks. Lecture 5, Part 4: Mar 29, 2004 Transport: TCP congestion control

CS519: Computer Networks. Lecture 5, Part 4: Mar 29, 2004 Transport: TCP congestion control : Computer Networks Lecture 5, Part 4: Mar 29, 2004 Transport: TCP congestion control TCP performance We ve seen how TCP the protocol works Sequencing, receive window, connection setup and teardown And

More information

Updates and Analyses

Updates and Analyses Archipelago Measurement Infrastructure Updates and Analyses Young Hyun CAIDA ISMA 2009 AIMS Workshop Feb 12, 2009 2 Outline Focus and Architecture Monitor Deployment Measurements Future Work 3 Introduction

More information