Online DQ Segments and Triggers John Zweizig LIGO/Caltech

DMT Overview

DQ Segment Handling Monitors send raw segments {pid, name, version, start, stop, active} to trigger manager. Trigger manager (TrigMgr)‏ »Collects segments from all monitors »Writes data to 1-32 output streams‏ »Current configuration one stream –S6segments, 16s xml files, ~32s latency (end-time). –Written as xml to /dmt/triggers/DQ_Segment

DQ Segment Handling User access »Segment written aynchronously to database »Xml file access utilities (Syracuse segment pkg)‏ Archival »Coalesce files (Syracuse)‏ »Archive coalesced files.

On-line Segment Generation Segments generated by extant on-line monitors »SegGener: Generic condition evaluation. »LightMon: Monitor arm light dips »PlaneMon: acoustic airplane detection‏ »SenseMonitor: inspiral range variation »PSLmon: glitch, RMS based segments »blrms_monitor:‏ Excess noise at low-f, trains

Current On-line Segment Types

Status h(t) generation »Bugs in stability, flag generation found and fixed by Joirdi, in gds (dol )‏ »running since 2/7/2008 Segment generation »Segments stored and inserted in Segment DB since 3/10/2009. »~1% not inserted in database immediately – reinserted off-line. KleineWelle trigger generation »Running – triggers lists written to /dmt »Occasional failures (source unknown: resource leak?)‏