LHC LOGGING Timeline of t he proj ect , resources Cont ext : where - - PowerPoint PPT Presentation

• R. Billen, CERN

LHC Logging - slide 1 /12 LHC-CP Workshop 21-22 March 2002

LHC LOGGING

Ronny BI LLEN & Maciej PERYT

SL/MR/DBS

• LHC-IAS
• R. Billen, CERN

LHC Logging - slide 2 /12 LHC-CP Workshop 21-22 March 2002

Outline

Launching of t he LHC Logging proj ect Mandat e, scope and obj ect ives 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 The t ime issue Archit ect ural design, use of t echnologies Conclusions

• R. Billen, CERN

LHC Logging - slide 3 /12 LHC-CP Workshop 21-22 March 2002

Project launch

St art ed on 17-Sep-2001 launched as sub-proj ect

• f LHC-CP
• R. Billen (SL)
• M. Peryt (LHC)

init ial resources http://lhc-logging.web.cern.ch/lhc-logging/

• R. Billen, CERN

LHC Logging - slide 4 /12 LHC-CP Workshop 21-22 March 2002

Mandate, scope, objectives

Analysis, design, procurement of Logging Facilit ies f or f ut ure LHC Cont rols Syst em

I nf ormat ion management f or LHC perf ormance improvement Meet I NB requirement s f or recording beam hist ory Make available long t erm st at ist ics f or management Avoid duplicat e logging ef f ort s

Wit hin t he scope is:

Analyze experience, capt ure requirement s I mplement f irst version t o support QRL cont rols I nvest igat e int erf ace wit h Alarms and Post -Mort em syst ems

Obj ect ives

Est ablish logging f acilit y f or QRL, scalable t o LHC ˜ Maj or proj ect review af t er validat ion f or QRL

• R. Billen, CERN

LHC Logging - slide 5 /12 LHC-CP Workshop 21-22 March 2002

Project Timeline

2001Q3 2001Q4 2002Q1 2002Q2 2002Q3 2002Q4 2003Q1 2003Q2

Logging Project Launch Today User Requirements Collected Functional Specification Published Architectural Design Published User Interfaces Published System Available for QRL Users Arrival Fellow System Needed by QRL Users

• R. Billen, CERN

LHC Logging - slide 6 /12 LHC-CP Workshop 21-22 March 2002

Selected Alarms Data Selected Post-Mortem Data

Logging Context

LHC equipment

• Gen. SERVICES

VACUUM CRYOGENICS

QR L

OTHERS … POST-MORTEM system Off- line Analy sis OPERATORS EXPERTS MANAGERS AD-HOC USERS

Selected Logging Data

LHC Logging Database

Run-time Logging Data

ALARMS system

Dat a providers Dat a users Dat a input , st orage &

• ut put
• R. Billen, CERN

LHC Logging - slide 7 /12 LHC-CP Workshop 21-22 March 2002

Functionalities

Logging data = Time- Series data + Meta- data

Time Time-

• Series

Series = 2D {Timest amp, Value} Met a Met a-

• dat a

dat a describes Time-Series

Dat a values of all normal t ypes Timest amps wit h sub-second precision possible Derived t ime-series wit h f ormula or algorit hm applied

Physical values f rom raw values Aggregat e inf ormat ion like subt ot als, averages

Logged dat a remains persist ent 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

• R. Billen, CERN

LHC Logging - slide 8 /12 LHC-CP Workshop 21-22 March 2002

Data filtering

The f inal obj ect ive of t he cent ral logging f acilit y in LHC

• perational perf ormance

I n discussion wit h t he dat a provider, advice will be given wit h respect t o appropriat e data input f ilt ering

Depending on syst em concerned May imply summary dat a, averages, sampling,…

For data output f ilt ering opt ions will be f oreseen as well

• R. Billen, CERN

LHC Logging - slide 9 /12 LHC-CP Workshop 21-22 March 2002

Interfacing to other systems

Correlat e Alarms Alarms dat a t o logging dat a

M Event t ype dat a M St art / End t ime of an alarm M Charact er st ring dat a N Well-def ined naming schema t o be respect ed

Combine Post Post -

• Mortem

Mortem dat a t o logging dat a

M Only loosely coupled syst ems M High f requency dat a t imest amp accuracy M Large volume dat a f ilt ering N Well-def ined naming schema t o be respect ed

Dat a exchange wit h indust rial syst ems (SCADA SCADA)

Logging of t heir dat a st andardized ? Visualizing logging dat a in PVSS t rending t ool why not ?

• R. Billen, CERN

LHC Logging - slide 10 /12 LHC-CP Workshop 21-22 March 2002

The TIME issue

The data provider will procure t o t he logging syst em time- stamped dat a, i.e. t he Time-Series The responsibilit y f or t he correctness of t he t ime remains wit h t he data provider All dat a providers should have a synchronized time- stamping f acility The use of UTC, Local Time, Time-zone, Summer-t ime

(t ill 2006 at least ) must

must be def ined at LHC-CP level I t will be dif f icult t o correlat e dat a wit h dif f erent t ime-st amp accuracy (and t o indicat e dif f erent accuracies)

• R. Billen, CERN

LHC Logging - slide 11 /12 LHC-CP Workshop 21-22 March 2002

Architecture & Technology

The archit ect ural design phase will st art in a f ew weeks Est ablished Technologies will be used…

• R. Billen, CERN

LHC Logging - slide 12 /12 LHC-CP Workshop 21-22 March 2002

Conclusions

The LHC Logging proj ect is f irmly launched The syst ems involved in QRL are t he f irst real client s 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!