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DCS Alternate Data Distribution System (DADDS)

DCS Alternate Data Distribution System (DADDS). Database Development Status Presentation to the STIWG/TWG July 9, 2008. Introduction. The DCS Alternate Data Distribution System (DADDS) was initially developed to disseminate DCS message data directly from the DAMS-NT

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DCS Alternate Data Distribution System (DADDS)

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  1. DCS Alternate Data Distribution System (DADDS) Database Development Status Presentation to the STIWG/TWG July 9, 2008

  2. Introduction • The DCS Alternate Data Distribution System (DADDS) was initially developed to disseminate DCS message data directly from the DAMS-NT • DADDS is designed to act as emergency DAPS backup for DOMSAT and NWSTG data streams • DADDS has been used operationally in place of DAPS and is available for backup • DADDS forms the first incremental component to replace DAPS

  3. Architecture

  4. Availability • DADDS includes redundant hardware with automatic failover switching capability • The architecture design has dual processing paths for immediate re-routing of data • Provides high-availability hardware configuration with rapid recovery in event of equipment failure • Hot-swappable hardware with redundant components and power supplies • Parallel blade servers/disks and SAN disk array • SQL server high-availability DBMS features

  5. Operation • DADDS uses daily PDT/UDT compressed files exported from DAPS as the database source • The DADDS concept allowed users to update records via web application in event DAPS unavailable for extended period • NOAA conducted Technical Interchange Meetings with Operators, Managers and Major Users to identify database requirements • To replace DAPS, DADDS enhanced to support user web interfaces and legacy batch functions

  6. Objectives • Maintain all database records essential to operation and maintenance of DCS • Provide database management software to fulfill real-time message handling requirements • Incorporate general functionality of the present DAPS fields, records, tables, and databases • Allow expansion/modification of the current fields, records, tables and databases • Support web interface to allow user access for updates, queries, searches, reports and utilities

  7. Requirements • User login and authentication • Access level and user privileges • User agency affiliation with individual accounts • Web database application and user interface • Incorporate DAPS tables and records • Update and expand database records and fields • Support legacy database batch updates • Message data access and retrieval • Replication, redundancy and robustness • System management and control

  8. Authentication • User application and registration process • Account authorization and privilege level • Password management functions • Emailing initial password instructions and changing passwords • Password expiration and warnings • Reminders and forgotten password features • Current NOAA password policy and rules may apply • Minimum of twelve characters with at least one capital letter, one lower case letter, one special character and no characters repeated more than twice • Passwords expire every sixty days and cannot be re-used for two years • No names or words found in the dictionary

  9. Access • Browser-based GUI for Login with common look and feel for all user classes • Secure access control for registered users • NOAA password rules enforcement for user access to Government system • Database controls for selective user access to authorized records

  10. Schedule • DBMS Requirements Apr – Jun 2008 • Redundant HW/SAN Jul – Aug 2008 • NSOF Acceptance Aug – Sep 2008 • Web Application Jul – Dec 2008 • DBMS Development Jul – Jan 2009 • DBMS Acceptance Feb – Mar 2009

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