IceCube Offline Database Overview

Georges KohnenUniversité de Mons-Hainaut

07.09.2006Zeuthen Collaboration Meeting

Today’s ride…

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

the future• Reading from the Database, interaction with

offline-software• Practical information• New features this year• To do

2

Introduction

• MySQL Database, “I3OmDb”• Contains / will contain most of 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

3

Introduction

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

4

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

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

7

Contents of “old” AMANDA omdb used by Sieglinde

Charge (Calibration) tables

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from domcal .xml files

Updated after domcal runs every few weeks/months

Very large sets of data (~100 MB per run for 9 strings)!

DOM Configuration (Detector Status) tables

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• Updated once per run• Indexed by ConfigId

DOM Monitoring table

A

Under work, need to include post-monitoring results

Trigger tables

B

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

NEW!

“Lookup” tables

C

• 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

D

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)

Internal tables

E

• Set of tables that keep track of

• Updates / Revisions

• Start and End dates of records

• Comments

Filling the Database

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

• Since this year: automatic update of Run details, Trigger data and Detector Configuration/Status from DAQ on Pole DB for online use

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

• Manual updates/filling of non-regular data: Geometry, Domcal, ...

F

Using the I3OmDb Database at SouthPole

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DAQ

PnF / Offline Softwareon SouthPole

SouthPoleI3OmDb

Fill run,trigger and

detector statusinformation

automatically

Sourcemodules

Othermodules

…

ReferenceI3OmDb

I3Dbservices

In testing now: 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”

I3Db Parameters

Practical Information

• Primary redundant Database server: icedb.umh.ac.be (also containing information about the content of the Database and about the I3Db services, as well as a public web-interface DEMONSTRATION)

• Mirrors: ppemons.umh.ac.be, dbs2.icecube.wisc.edu (should be used from the USA)

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

(> mysql -h "server" -u www)• Recommended tools for “brute” access:

– MySql Query Browser– MySql Control Center

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New features this year

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• On the database side:– Trigger storage tables– Continuous update of detector and trigger on SouthPole

(each run)• On the software side:

– I3Db turned into a set of services– Reconnection to DB in case of problem

To be done

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• On the database side:– Store monitoring information from “human” detector

monitoring– Store precise status information about the DOMs– Store TWR data– Store Flasher data– 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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• Questions?

• ...?