LSC Meeting 2002.03.21LIGO Scientific Collaboration - University of Wisconsin - Milwaukee 1 LSC Software and Other Things Alan Wiseman University of Wisconsin.

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LSC Meeting LIGO Scientific Collaboration - University of Wisconsin - Milwaukee 1 LSC Software and Other Things Alan Wiseman University of Wisconsin -- Milwaukee LIGO-G Z

LSC Meeting LIGO Scientific Collaboration - University of Wisconsin - Milwaukee 2 Astrophysical Searches During E7 Full search pipeline is operational »Inspiral searches: FCT and Template »Burst (unmodelled) searches: Power Statistic, TimeFreq Cluster, Slope »Continuous Waves »Stochastic Background Did any of the searches use LDAS during E7? All of them! LIGO Software Users Group: Patrick Brady, Stuart Anderson, Linqing Wen, Julien Sylvester, Ed Daw, Duncan Brown, Greg Mendell, Kent Blackburn

LSC Meeting LIGO Scientific Collaboration - University of Wisconsin - Milwaukee 3 Analysis Groups Mechanism for initiating the analysis groups »Internal LSC proposals, e.g. the upper limits groups »Good set of initial conditions –Resource demands, FTE’s, Data usage »Expanded to include the ``working groups’’ Good initial conditions, … »But short on follow up … Need a way to close the loop –Thus the All LSC telecon last month –There will be more of them –Headline news 10minute presentation format will likely change –Feedback to the Lab –Discussion of results

LSC Meeting LIGO Scientific Collaboration - University of Wisconsin - Milwaukee 4 Reduced Data Sets Long term solution »Generated within the FRAME API »Eliminate channels, and decimation Short term solution Constraints »Where do we put E7 Data this spring? »Limited disk space at the sites (during the hardware upgrade) »Limited disk space at MIT (where burst group is planning analysis) »DMT availability »Rules and philosophy about software quality Control (MDC) »Reduce the data (no decimation) –Fit on the remaining disks at the sites –Approx 2TBytes at LHO, 1TByte at LLO –Easy access to DMT at the sites »Full stripe of ``playground’’ and all the AS_Q data at MIT for Burst Group »Full data set on disk at UWM for Inspiral Group »Full data set on tape at CIT just in case

LSC Meeting LIGO Scientific Collaboration - University of Wisconsin - Milwaukee 5 ASIS Astrophysical Source Identification and Signature »Subcommitee originally developing astrophysical search code »Now … –Many of the astrophysical question now fall under the purview of the UL groups –Many of the software development details handled in the working groups »What’s next? LSC executive committee –Discussion in the ASIS/Source-workshop session on Friday

LSC Meeting LIGO Scientific Collaboration - University of Wisconsin - Milwaukee 6 Changes to FRAME Specification FRAME: Universal (International) Currency for Gravitational-Wave Data »Specification has been reasonably stable … »However some changes needed to be made… –Working group (including VIRGO representation) made some recommendations e.g. Remove the ``local time’’ from the frame carry some multidetector information carry a specific FFT data structure –Software Change Control Board met (Jolien Creighton, John Zweizig, Stuart Anderson) [Ratified, Remanded, Rejected] »Goal: Implement (and test) the changes before E7

LSC Meeting LIGO Scientific Collaboration - University of Wisconsin - Milwaukee 7 Distributed Computing Issues: Defining Tier II Centers, Managing the distributed resources, Allocating the computing resources, FTE’s to implement solutions »Under review by LSC Computing Resources Committee –Albert Lazzarini, Warren Anderson, Kent Blackburn, Patrick Brady, Sam Finn, Tom Nash, Eric Katsavounidis, Alan Wiseman »We started our planning and coding before ``Grid Computing’’ was a household word … How do we embrace this now? »How much redesign can we afford with S1 in a few months? »How much hardware and software conformity can we (should we) try to exert on the LSC institutions? »The GW data analysis problem is very well suited to distributed computing, therefore we should be bold in using the grid tools. »Should not settle adding a layer of wrapping over what we have.

LSC Meeting LIGO Scientific Collaboration - University of Wisconsin - Milwaukee 8 White Paper Status Report … Or obituary Rai has stated it is complete … until next time My suggestion: A focused rewrite of three areas that are under very active discussion (1)Mechanism or some requirements that the analysis groups close the loop with the collaboration and the lab. (2)ASIS restructuring. (3) Clearer Definition of Tier II center responsibilities

LSC Meeting LIGO Scientific Collaboration - University of Wisconsin - Milwaukee 9 LDAS Camp II Location: UWM Tentative (vague) dates: Mid May Subject Matter: LDAS Pipeline Searches, LAL, LALWrapper … If you are interested, speak to me.