WHFS Database Data Exchange Jerry Nunn West Gulf River Forecast Center December 05, 2002

Software Package Overview l Three Main Components:  Transfer (Copy) Component (WHFSTran)  Standardization Component (SNOOPY/UPDATEDB)  Consistency Check and Standardization Check Component (in production – dependent on CR project )

Database Transfer Program (WHFSTran) Preliminary version in almost every SR office with WHFS Shell program  Runs twice weekly on cron

Database Transfer Program (WHFSTran - continued) l Unloads database tables & schema l NOTE: ONLY Parametric data (no met. or hydro data tables) transferred l Makes output files smaller

Database Transfer Program (WHFSTran - continued) l Transfers (tarred and compressed) files to central server (SRH) l Small file size increases program efficiency l SRH server:  allows full access  avoids firewall, password, permissions

Automated Database Standardization Package l UPDATEDB – Batch scripts to update selected table entries (automatic); l SNOOPY - a GUI used to make changes (interactive); l Final design recently set; l Input from every region during the development and testing phase; l National Headquarters also involved  Goal: Build consensus and “nationalize” the code.

Consistency and Standardization Check Program l Under development l Most likely a “C” program  Logic: Patrick Sneeringer  Code: James Paul l Designed to be run at RFC and backup WFO

Consistency and Standardization Check Program (continued) l Automatically downloads files (created by WHFSTran) from selected WFOs l Creates version of WFO database in INFORMIX at RFC (or backup WFO)

Consistency and Standardization Check Program (continued) l GUI-based program then checks each table  Looks for differences in databases  Changes approved by user  May be automated (WFO level)

Consistency and Standardization Check Program (continued) l Discrepancies stored in new database tables l Known discrepancies can be skipped with next pass l Considerable user freedom to make changes (or not)

In Summary… l Standardization and transfer functions almost complete l Consistency check function expected Spring 2003 l Questions: Patrick Sneeringer X209