IceCube Offline Database Overview

Georges KohnenUniversité de Mons-Hainaut

6.6.06

Today’s ride…

• Introduction• Database contents• Filling the Database, now and in the

future• Reading from the Database, interaction

with offline-software• Practical information

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Introduction

• MySQL Database, “I3OmDb”• Contains / will contain all the non -physics

information needed by offline -software, on the SouthPole, on a cluster or on your laptop:– Detector Geometry / Calibration / Status / Run /

Monitoring / Trigger… information– Ice Properties– AMANDA information– Different “lookup” tables

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Introduction

• The stored information is time -based• Records are “stacked” on each other• Example: Geometry

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Time

Planned Geometry, whole detectorDrilling: only string 21

Better calibrations: only string 21

Drilling: lots of strings

01/2004 01/2005 01/2006

“Qualifier”

Drilling01/2006Corr02/2005Drilling01/2005Initial

Demonst

ration

Geometry tables

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• AMANDA Geometry (recently corrected…)

• Planned geometry (IceCube + IceTop)

• Drilling/Installation Season 1 (string 21 and stations 21, 29, 30 and 39)

• Corrections to these coordinates (from Kurt)

• Drilling/Installation Season 2 (strings 29, 30, 38, 39, 40, 49, 50, 59 and stations 38, 40, 47, 48, 49, 50, 57, 58, 59, 66, 67, 74)

(= most “real” geometry presently available)

IceTop tables

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AMANDA tables

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Contents of “old” AMANDA omdb used by Sieglinde

Charge (Calibration) tables

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from domcal .xml files

Updated every few weeks

DOM Configuration tables

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Updated once per run

DOM Configuration tables

• There are 64 variables in these table: for 5000 DOMs and 1 run = 1 day, there are 117 million entries for just one year → waaaaaay too much!

• → Split this table up according to the frequency at which the variables change (once a run, once a year,…)

• This is one of the cases where input / documentation / coordination is still needed!

A

DOM Monitoring table

B

from Ignacio’s Monitoring files

Trigger tables

C

• Different design: triggers do not all have the same parameters

• New! Being tested right now…

“Lookup” tables

D

• OMId ↔ (string,tube) for AMANDA• DOM Serial number ↔ DOM location (string,tube)• DOM Serial number ↔ DOM name/nickname• RunId ↔ Run start date/time

Independent tables

E

IceProperties: Effective Scattering length and Absorption length for different wavelengths (in 10 nm bins), for cos θ = 0.80 and 0.94, and for different depths: Z in 10 m bins (X and Y not (yet) available)

Filling the Database

• Until recently: filled from (text/.xml) files, database created from scratch each time

• Since this past Pole season: automatic update of Detector Calibration/Status from DAQ for online use

• Then, regular synchronization of SouthPole I3OmDb with a reference Database in the northern hemisphere, and overall synchronization with this reference DB

F

Using the I3OmDb Database at SouthPole

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DAQ

Offline chain of modulesSouthPole version

SouthPoleI3OmDb

fillcalibration anddetector status

informationautomatically

Sourcemodules

Othermodules

…

ReferenceI3OmDb

I3Dbservices

To be done: automaticsynchronization ofPole and reference DBs(c.f. RevisionId)

Using the Database in offline-software

• I3Db project in offline-software: new design: not one monolithic piece of code anymore, but– one service for each stream (geometry, calibration, detector status,…)– one database service, responsible for connecting to the Database,

retrieving/caching the data,…• IceProperties are currently not used in offline-software, thus

I3Db does not retrieve this information (yet)

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I3OmDb

Sourcemodules

Othermodules

…

I3Dbservices

Physics input

I3Db retrieves the information according to the date of the event

Offline chain of modules

“hot-pluggable”

Offline-software V2

soon available!

Practical Information

• Primary Database server: icedb.umh.ac.be (containing information about the content of the Database and about the I3Db services)

• Secondary Database Servers: ppemons.umh.ac.be, dbs2.icecube.wisc.edu

• Database Name: "I3OmDb"• Read-only login: username "www“

(> mysql -h "server" -u www)• Recommended tools:

– MySql Query Browser– MySql Control Center

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To be done

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• On the database side:– Need to store monitoring information from “human”

detector monitoring– Need to store precise status information about the

DOMs– Finalize complete DB synchronization– Implement “Garbage” or “Temporary” database?

• On the software side:– Need to rethink caching process in I3Db– New database services?

This is the end

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