Outline Launching of t he LHC Logging proj ect Mandat e, scope and obj ect ives LHC LOGGING Timeline of t he proj ect , resources Cont ext : where does logging f it in? Basic f unct ionalit ies Filt ering of dat a I nt erf acing t o ot her syst ems Ronny BI LLEN & Maciej PERYT The t ime issue Archit ect ural design, use of t echnologies SL/MR/DBS - LHC-IAS Conclusions LHC Logging - slide 1 /12 LHC-CP Workshop 21-22 March 2002 R. Billen, CERN LHC Logging - slide 2 /12 LHC-CP Workshop 21-22 March 2002 R. Billen, CERN Project launch Mandate, scope, objectives Analysis, design, procurement of Logging Facilit ies f or http://lhc-logging.web.cern.ch/lhc-logging/ f ut ure LHC Cont rols Syst em St art ed on I nf ormat ion management f or LHC perf ormance improvement 17-Sep-2001 Meet I NB requirement s f or recording beam hist ory launched as Make available long t erm st at ist ics f or management sub-proj ect Avoid duplicat e logging ef f ort s of LHC-CP Wit hin t he scope is: Analyze experience, capt ure requirement s I mplement f irst version t o support QRL cont rols R. Billen (SL) I nvest igat e int erf ace wit h Alarms and Post -Mort em syst ems M. Peryt (LHC) Obj ect ives init ial Est ablish logging f acilit y f or QRL, scalable t o LHC resources ˜ Maj or proj ect review af t er validat ion f or QRL LHC Logging - slide 3 /12 LHC-CP Workshop 21-22 March 2002 R. Billen, CERN LHC Logging - slide 4 /12 LHC-CP Workshop 21-22 March 2002 R. Billen, CERN
Project Timeline Logging Context Dat a input , Arrival Today st orage & Fellow Dat a providers Dat a users out put 2001Q3 2001Q4 2002Q1 2002Q2 2002Q3 2002Q4 2003Q1 2003Q2 LHC equipment OPERATORS LHC QR CRYOGENICS Selected Run-time Logging Logging L Architectural Logging Data Logging Database VACUUM EXPERTS Data Off- Design Project line Published Gen. SERVICES Launch Analy sis User MANAGERS User OTHERS … Requirements Interfaces ALARMS system Selected Alarms Data Collected Published AD-HOC USERS POST-MORTEM system Selected Post-Mortem Data Functional System System Specification Available Needed Published for QRL by QRL Users Users LHC Logging - slide 5 /12 LHC-CP Workshop 21-22 March 2002 R. Billen, CERN LHC Logging - slide 6 /12 LHC-CP Workshop 21-22 March 2002 R. Billen, CERN Functionalities Data filtering Logging data = Time- Series data + Meta- data The f inal obj ect ive of t he cent ral logging f acilit y in LHC operational perf ormance Time Time- -Series Series = 2D {Timest amp, Value} Met a- -dat a dat a describes Time-Series Met a Dat a values of all normal t ypes I n discussion wit h t he dat a provider, advice will be given Timest amps wit h sub-second precision possible wit h respect t o appropriat e data input f ilt ering Depending on syst em concerned Derived t ime-series wit h f ormula or algorit hm applied May imply summary dat a, averages, sampling,… Physical values f rom raw values Aggregat e inf ormat ion like subt ot als, averages Logged dat a remains persist ent For data output f ilt ering opt ions will be f oreseen as well Dat a out put t ool wit h chart ing and f iling opt ions User prof ile dat a kept t o st ore pref erences f or dat a visualizat ion LHC Logging - slide 7 /12 LHC-CP Workshop 21-22 March 2002 R. Billen, CERN LHC Logging - slide 8 /12 LHC-CP Workshop 21-22 March 2002 R. Billen, CERN
Interfacing to other systems The TIME issue Correlat e Alarms Alarms dat a t o logging dat a The data provider will procure t o t he logging syst em M Event t ype dat a time- stamped dat a, i.e. t he Time-Series M St art / End t ime of an alarm The responsibilit y f or t he correctness of t he t ime M Charact er st ring dat a remains wit h t he data provider N Well-def ined naming schema t o be respect ed All dat a providers should have a synchronized time- Combine Post Post - - Mortem Mortem dat a t o logging dat a stamping f acility M Only loosely coupled syst ems The use of UTC, Local Time, Time-zone, Summer-t ime M High f requency dat a t imest amp accuracy M Large volume dat a f ilt ering (t ill 2006 at least ) must must be def ined at LHC-CP level N Well-def ined naming schema t o be respect ed I t will be dif f icult t o correlat e dat a wit h dif f erent Dat a exchange wit h indust rial syst ems ( SCADA SCADA ) t ime-st amp accuracy (and t o indicat e dif f erent accuracies) Logging of t heir dat a st andardized ? Visualizing logging dat a in PVSS t rending t ool why not ? LHC Logging - slide 9 /12 LHC-CP Workshop 21-22 March 2002 R. Billen, CERN LHC Logging - slide 10 /12 LHC-CP Workshop 21-22 March 2002 R. Billen, CERN Architecture & Technology Conclusions The archit ect ural design phase will st art in a f ew weeks The LHC Logging proj ect is f irmly launched The syst ems involved in QRL are t he f irst real client s Est ablished Technologies will be used… The Logging Syst em must be scalable f or LHC Milest ones have been respect ed so f ar The archit ect ural design phase is about t o st art The ext ra 6 mont hs are warmly welcomed f or t he implement at ion phase That ’s all f olks! LHC Logging - slide 11 /12 LHC-CP Workshop 21-22 March 2002 R. Billen, CERN LHC Logging - slide 12 /12 LHC-CP Workshop 21-22 March 2002 R. Billen, CERN
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