1 00/XXXX Crown copyright North America-Europe Data Exchange
Meeting Dorval, Canada May 2004 2 00/XXXX Crown copyright
Telecommunication Links Status Report Prepared By: David Hennings
UK Met Office Crown copyright Main Communications Links from Exeter
Crown copyright RMDCN Connections with Exeter National
Meteorological ServiceProtocolPVC Speed (Kbs -1 ) BelgiumFTP32 in /
32 out DenmarkTCP Sockets32 in / 32 out DWDFTP64 in / 64 out
IcelandFTP 8 in / 8 out IrelandFTP64 in / 64 out ItalyFTP16 in / 16
out Mto FranceFTP128 in / 256 out [384*] Russian FederationFTP 8 in
/ 64 out NetherlandsTCP Sockets64 in / 64 out NorwayTCP Sockets32
in / 32 out PortugalFTP32 in / 32 out SpainTCP Sockets32 in / 32
out Crown copyright Present Data Volumes on NESDIS Link
Requirements DescriptionDaily Data Volume (MBytes) NOAA AMSU-A
Level 1B92 NOAA AMSU-ABLevel 1B330 DSMP SSM/I Brightness
temperatures220 NOAA TOVS MSU Level 1B1 NOAA TOVS SSU Level 1B13
QuikScat Scatterometer data209 NOAA AVHRR Products on a HIRS
Grid.35 NOAA AVHRR 100km and 50Km SSTs7.9 NOAA AVHRR Mapped Global
Area Composites6.3 NOAA Ozone Retrieved profiles and/or total
column from SBUV 1.2 AQUA AIRS Brightness temperatures300 AQUA
AMSU-A Brightness temperatures11.5 NOAA TOVS HIRS Level 1B45.7 NOAA
ATOVS HIRS Level 1B206.7 GOES cloud-tracked VIS/IR/WV Winds8.4
TOTAL1487.7 Crown copyright Frost Telesto (& Mimas) Crown
copyright Frost WMO Message Switching System Replacement for ageing
TROPICS systems HP UNIX servers running HP-UX Active and Hot
Stand-by set-up Synchronisation via 1Gbs -1 Fibre 100Mbs -1 to LAN
for data transfers. Upgrading to 1Gbs -1 Corobor Messir-Comm for
WMO switching Nexor Mailer for X.400 & SMTP Crown copyright
Netlink (Nettle) Crown copyright Netlink FTP File Switch Dec Alpha
1200 servers running VMS Active and Hot Stand-by set-up 100Mbs -1
to LAN for data transfers In-House application for file switching
Non WMO switch for Model & Sat products Switches fewer messages
than Frost, but 10 times data volume. Replacement project is just
getting underway Crown copyright GTS Link with Washington Recently
moved to BT Frame Relay link 32 Kbs -1 Committed Information Rate
Three logical data channels (Alpha-Numeric, GRIB & T4) TCP
Sockets protocol Crown copyright GTS Link with Washington
Alpha-Numeric rx 44.6 (36961)tx 17.1 (29268) GRIB rx (40803)tx
(29302) T4 rx 3.4 (38)tx 6.7 (74) Mb (Number of messages) per day
on 5 th May 2004 with Frost Crown copyright GTS link: Tx to
Washington Crown copyright Rx from Washington Crown copyright GTS
Link with Toulouse Via RMDCN Three logical data channels
(Alpha-Numeric, GRIB & T4) for output Two logical data channels
(Alpha-Numeric + GRIB, & T4) for input FTP Format 00, with
CCCCnnnnnnnn filename format Crown copyright GTS Link with Toulouse
Alpha-Numeric (+ GRIB rx) rx 39.6 (16785)tx 71.3 (47490) GRIB rx -
(-)tx 98.2 (27897) T4 rx 18 (1203)tx 57.5 (1476) Mb (Number of
messages) per day on 5 th May 2004 with Frost Crown copyright Tx to
RMDCN Crown copyright Rx from RMDCN Crown copyright CMC Dorval
Crown copyright ECMWF Rx over 2Mb/s Megastream link Using ~50%
inbound bandwidth Crown copyright Weve moved to Exeter System moves
began April 2003 Operational in Exeter from July 2003 Last system
move January 2004 Bracknell switched off in February 2004 Crown
copyright Whats new at Exeter Two separate computer halls Each hall
has generator backup Dual systems have one in each hall All WAN
connections through a dual firewall Much improved LAN
infrastructure No requirement for separate DR site Much improved
working environment Free coffee! Crown copyright Supercomputing -
Cray T3E [ ] T3E-AT3E-B Process Elements Clock Speed450 MHz600 MHz
Low Memory PEs 864 PEs at 128 MBytes 624 PEs at 256 MBytes High
Memory PEs 16 PEs at 512 MBytes Disk Capacity GBytes1440 Peak
Performance MFlops Total System Performance GFlops Crown copyright
Supercomputing - NEC [2004-] System CPUs per node MemoryDisc Space
Operating System NEC SX6832GB576GBSuper-UX NEC TX71224GB-Linux The
NEC Phase 2 system is made up of thirty NEC SX-6 supercomputer
nodes, and four NEC TX-7 front end/server systems Crown copyright
Future Plans To move away from legacy protocols (X.25, X400) IP
links only Fax and Telex already provided by bureau service via
SMTP & FTP Make use of Internet VPNs Upgrade Internet
connection from 30Mbs -1 to Mbs -1 Greater use of SMTP Upgrade of
Netlink file switch using a UNIX platform
