RMDCN Requirements Tony Bakker Network and Security Section
RMDCN Requirements Tony Bakker Network and Security Section ECMWF RMDCN Steering Group, 4 -6 June 2008, Vienna Slide 1 ECMWF
Scope Current use of RMDCN and other networks between - ECMWF - Member States and Co-operating States - EUMETSAT Potential changes related to: - Increase in model resolution - Observing system - New projects RMDCN Steering Group, 4 -6 June 2008, Vienna Slide 2 ECMWF
Current situation Main traffic patterns - Data dissemination - Data acquisition - Access to computing resources - Access to archived data Network infrastructures used are - RMDCN - Leased line between UKMO and ECMWF - Internet - EUMETCast RMDCN Steering Group, 4 -6 June 2008, Vienna Slide 3 ECMWF
Access to computing resources and archived data Users from National Met Services can use both RMDC and Internet Users from universities, research institutes, etc. can use the Internet only Internet is the preferred choice for non-critical data transfers to - Avoid impact on operational traffic using the RMDCN - Take advantage of available Internet bandwidth Although difficult to assess, the future requirements for network bandwidth are likely to grow with the increase in the size of data archive RMDCN Steering Group, 4 -6 June 2008, Vienna Slide 4 ECMWF
Data acquisition Entry point and first step of the data flow needed for the operational forecast production Daily figures show that - 1. 5 gigabytes received from UKMO (GTS + USA satellite data) - 2 gigabytes received from DWD (GTS + EUMETSAT satellite data) - 2. 5 gigabytes received via Internet mainly from USA + very limited amount from Member States and Cooperating States - 20 gigabytes received via EUMETCast RMDCN used for transfers from DWD only Amount of data fairly constant in time increasing with the launch of new satellites and the availability of data from new instruments RMDCN Steering Group, 4 -6 June 2008, Vienna Slide 5 ECMWF
Data dissemination Characterised by an extremely large catalogue - Current total volume is 2. 3 terabytes - Users can request tailored products - Large variety of products with very little overlap - User can control, at product level, the network used for transfers Centred on two peak periods per day (00 and UT) each lasting 2 to 3 hours - In addition, products from BC project disseminated at 06 and 18 UT to the participating countries Time or mission critical data sent over RMDCN or Leased Line while less critical data (e. g. backup/research data) transferred over the Internet RMDCN Steering Group, 4 -6 June 2008, Vienna Slide 6 ECMWF
Data dissemination (continued) Denmark: daily traffic Denmark: weekly traffic RMDCN Steering Group, 4 -6 June 2008, Vienna Slide 7 ECMWF
Data dissemination (continued) RMDCN - Bandwidth varies between countries - “basic package” includes 768 kilobit/s IP bandwidth and 384 kilobit/s ISDN backup Funded centrally for Member States Co-operating States, EUMETSAT and other RMDCN countries fund their connection to the RMDCN - Countries are free to increase the available IP bandwidth out of their own budget according to their requirements Appropriate dissemination channel chosen by each country according to own requirements - Some (e. g. Norway) increasingly use Internet to complement RMDCN - Others (e. g. France) rely exclusively on the RMDCN Steering Group, 4 -6 June 2008, Vienna Slide 8 ECMWF
Data dissemination (continued) Over the last 8 years the volume of data transferred over RMDCN has increased by a factor of ~20 RMDCN Steering Group, 4 -6 June 2008, Vienna Slide 9 ECMWF
Upcoming changes Evolution of model resolution - 2009/2010: increase from 25 km x 25 km and 91 vertical levels to 16 km x 16 km and ~130 vertical levels - Therefore, volume of data to be transferred will increase by a factor up to ~4 - The increase in data volume is expected not to become effective immediately - 2015: next resolution upgrade will multiply by ~4 the volume of data available for dissemination New products, larger hindcast sets, etc will further increase the data volume RMDCN Steering Group, 4 -6 June 2008, Vienna Slide 10 ECMWF
Upcoming changes (continued) Data acquisition - Growth will continue to be strongly linked to satellites METOP-B and NPP are expected to increase data volume by a factor of 5 to 10 NOAA polar satellites (NPOESS), first in 2013, will require an increase in the networking capacity with UKMO by 15 Expected daily amounts for the next 10 years are: - 22. 5 gigabytes from UKMO - 10 gigabytes from DWD - 7. 5 gigabytes via the Internet - 60 gigabytes via EUMETCast RMDCN Steering Group, 4 -6 June 2008, Vienna Slide 11 ECMWF
Upcoming changes (continued) Potential new projects - The number of Member State projects running at ECMWF are expected to continue to increase continuing the recent trend - Additional time-critical applications with their needs for both acquisition and dissemination of data may be implemented - New projects like GLAMEPS are aiming to use ECMWF as a central resource All these activities will required improved networking facilities between ECMWF and MS/Co-op States RMDCN Steering Group, 4 -6 June 2008, Vienna Slide 12 ECMWF
Questionnaire Expected growth in following areas: - ECMWF dissemination data - Future service oriented architecture for ECMWF dissemination - Other ECMWF traffic requirements - GTS data - Other traffic - Envisaged new traffic RMDCN Steering Group, 4 -6 June 2008, Vienna Slide 13 ECMWF
SLA Requirement Mission Critical - Managed Network; Dual connection High Availability - Managed Network; With backup (ISDN) Standard - Managed Network; No backup Best Effort - Internet like RMDCN Steering Group, 4 -6 June 2008, Vienna Slide 14 ECMWF
Summary Responses Site Current connection Future Connection SLA requirement RMDCN traffic Finland 768 kbps 1. 5 Mbps High Availability France 3 Mbps 20 Mbps High Availability / Mission Critical Germany 2 Mbps 10 Mbps High Availability / Mission Critical Hungary 1 Mbps 2 Mbps High Availability Italy 2 Mbps 10 Mbps High Availability / Mission Critical Norway 2 Mpbs 24 -100 Mbps High Availability Romania 256 kbps 1 Mbps High Availability Sweden 3 Mbps 4 Mbps Mission Critical UK 2 Mbps 27 Mbps High Availability / Mission Critical EUMETSAT 2 Mbps 12. 5 Mbps RMDCN Steering Group, 4 -6 June 2008, Vienna Mission Critical Slide 15 ECMWF
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