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UK Link Technology Refresh

UK Link Technology Refresh. Annie Griffith Infrastructure Programme Manager July 2007. UK Link Background. UK Link applications running since 1996, last Technology Refresh completed 2001 UK Link Risk Assessment Carried out in December 2004 UK Link lifespan indicated as 2008

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UK Link Technology Refresh

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  1. UK Link Technology Refresh Annie Griffith Infrastructure Programme Manager July 2007

  2. UK Link Background • UK Link applications running since 1996, last Technology Refresh completed 2001 • UK Link Risk Assessment Carried out in December 2004 • UK Link lifespan indicated as 2008 • UK Link ownership transferred to xoserve May 2005 • UK Link performance deterioration identified 3rd Quarter 2005 • 3 Month UK Link Technology Feasibility Review sanctioned December 2005 • Review recommended upgrade to hardware, database version & application toolset

  3. Scope • Technology Refresh is an upgrade of the technical components that make up Sites and Meters and Invoicingsystems • Technology refresh is essential to • Enable continued delivery of a reliable and robust set of UK Link systems • Allow xoserve to continue to provide services on behalf of Networks • Extend UK Link system lifetime for a further 4-6 years • The Technology Refresh IS NOT an application re-write • No functionality changes to be implemented alongside upgrade

  4. Progress since last update Key progress made since last update: • Successful conclusion of POC on 7th May • Installation and configuration of all servers at Peterborough Data Centre completed, installation at Wellingborough commenced • VPN Link established between Peterborough and Bangalore ODC (interim until WAN Links Delivered) enabling development activities to continue • Network Operations Centre (NOC) set up in Bangalore and all support tools selected • Interface and network design agreed with National Grid

  5. Proof of Concept • Sign off of this milestone required successful deliveries across four areas • Confirmation of compatibility of selected hardware and software stack • Data Migration • Including compatibility testing of interface between Oracle v8i and v10g • Bulk data migration approach and application of Delta data migration updates • Upgrade of the development Toolset, AllFusion:Gen and Oracle Forms and Reports • Business Processes • Input and Output files processed correctly and generated as per current format • Online functionality same as now works on current desktop platform • Oracle Reports and Forms functionalities unaffected • Testing of at least one of each type of interface • Online screens and batch processes perform database updates as now

  6. Overall Testing Approach • Full code migration and upgrade commenced (unit testing) • OAT – being done in 2 phases Jun ’07 – Jan ‘08 • OAT1 – machine build confirmation • OAT2 – performance testing, operational running against schedules, fall back and recovery testing, testing all associated support procedures, including those across NG data centres. • System testing to start : mid Aug - mid Oct • UAT : Nov – end Jan • to include Shipper Trials : late Nov - early Dec • Minimum of 2 further full scale trial migrations planned over summer period to allow for tuning • Dress rehearsal of cutover end Jan – early Feb

  7. Shipper Trials • Only file routing tests to be executed, limited to sample files only • SPA files – inbound and outbound • Invoices – outbound, with inbound delivery receipt • Read files – outbound in case of data logger reads • Involvement optional • File test approach to be same as followed in past by other projects • Use test file naming convention, such as xxx01.TN123456.IDB • Shipper trials planned during UAT - late November / early December • Planning for this phase due in September

  8. Cut-over and Implementation • Following POC, initial theoretical estimates for cut-over and implementation timescales produced based on: • Data volumes • Network Capacity • Reconciliation checks needed • Potential outage of 3 - 4 days currently • Detailed implementation planning activities commenced • Looking at cut-over activities and catch-up processing • Timescales being challenged, seeking alternative approaches and tuning to reduce outage • Minimum of 2 further full scale trial migrations planned over summer • 1 or 2 non-effective days may be needed

  9. Cutover Approach • Data cutover • Likely to start 3 weeks in advance of main cutover, then will require “delta” data updates • This will have no effect upon the operational service • Final cutover starts 22nd/23rd February 2008 • REC invoice to be issued early on Friday 22nd – due dates will be unchanged • Other production runs on 22nd will be unchanged • Outage start time • Considering what is most beneficial overall to reduce total elapsed time needed for cut-over, catch-up and return to normal operation • Starting after Datalogger issue on Saturday 23rd seen as optimal start

  10. High Level Timetable (Draft) • Invoices • Friday 22nd - REC Invoice issued early, due dates unchanged • Non-effective Days • Mon 25th Feb - Tuesday 26th Feb • Relief from DM Read liabilities Sun 24th – Weds 27th • Datalogger files • Issued from OLD UK Link Sat 23rd • Suspend daily issue of data logger files Sun 24th – Weds 27th • Issued from NEW UK Link Thursday 28th • Transfers • Last files processed 11pm Friday 22nd Feb on OLD UK Link • Next Transfer Run – Weds 27th Feb on NEW UK Link

  11. Next Steps • Code migrations and initial testing activities to continue • Commissioning of Wellingborough Data Centre and WAN Links • Continue with more in depth Implementation Planning • Firm up on outage timings • Confirm non-effective days requirement • Understand catch-up and return to normal operation • Report back at August UKLC with formal notification of outage

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