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John Benson 1

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The EVLA Archive is the E2E Archive. Will include data from : VLA ... Assorted cgi C programs. 14 June 2004. EVLA Software Review. John Benson 6. EVLA Archive ... – PowerPoint PPT presentation

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Title: John Benson 1


1
EVLA Archive
  • The EVLA Archive is the E2E Archive
  • Will include data from
  • VLA bulk data, 1976 - future
  • Continuous VLBA data
  • GBT data, 2004 future
  • EVLA data
  • ALMA connection

2
EVLA Archive
  • E2E archive design/prototype Fall 2001
  • Phase 1 operational today
  • All VLA science data 1976 current
  • VLBA science data 2002 current
  • Small amount GBT science data
  • EVLA monitor data current
  • User downloads 350 users, 8000 files,
  • 500 Gbytes public, 400 Gbytes proprietary

3
EVLA Archive
  • E2E Archive - Phase 1 Goals
  • Scientific prototype, encourage imaginative data
    mining
  • Make all metadata available in catalog - EVLA
  • By experimentation determine technology limits
    for large archives
  • Support a useful monitor data archive during EVLA
    construction.

4
EVLA Archive
  • Phase 1 Archive Technology
  • User Interfaces Query Tools
  • Web browser forms pages
  • Simple Python scripts
  • User Interfaces Displays
  • Web browser html
  • Comma Separated Variable text tables
  • XML tables (VO)
  • Graphical plotter, VO tbl inputs, applet

5
EVLA Archive
  • Phase 1 Archive Technology
  • JAVA servlet JDBC connection to db catalog
  • Apache Tomcat web server
  • Catalog tables Oracle 9 on PC Linux
  • 12 Terabytes disk array for bulk data
  • Assorted cgi C programs

6
EVLA Archive
  • E2E Archive for EVLA
  • Phase 1 Archive designed for EVLA
  • Mainly WIDAR correlator channelization
  • EVLA, NMA, VLBA combination
  • EVLA monitor data
  • currently archived in daily Oracle tables,
  • accessible via web tool,
  • display in browser tables, cvs tables, graphical
    plotter
  • Demod to engineers, techs

7
EVLA Archive
  • Future Topics
  • EVLA data storage format
  • Near ALMA Data Export Format
  • Pipeline interfaces
  • Operating at WIDAR data rates
  • Storage media
  • Storing the other information
  • Other archive technologies
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