LHCb Resource requests for (2011),2012,2013

LHCb Resource requests for

(2011),2012,2013

M.Cattaneo (and R. Graciani)LHCC referees meeting

21 March 2010

Summary from LHCb-PUB-2011-009(updated, to reduce tape usage)

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Overview

m Changes to Computing Modelm 2011 Re-assessmentm 2012-2013 requests

LHCC Referees meeting 21st March 2011

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Changes to Computing Model (I)

m LHC has increased mean number of visible proton-proton collisions per bunch crossing relative to LHCb TDR design:

o from 0.4 to 2.0m This implies changes to basic

parameters of the model:Process

CPU (HS06·s/evt) Data Type Storage (kB/evt)

New Old New Old

Data Taking RAW 50 30

Reconstruction 25 12 SDST 40 25

Stripping 1.75 0.8 DST 130 80MDST 13

Simulation 1700 376 DST 400 300


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Changes to the Computing Model (II)

m Reduce number of replicas to accommodate larger events:

o 4 T0D1 replicas (was 2 T1D1 (‘master’) plus 5 T0D1 (‘secondary’))

o All are now considered ‘secondary’ m Archival:

o 2 archive: T1D0 (T2D0 at CERN for RAW)o ‘master’ copy written directly to archival storage

P In previous model, T1D1 masters migrated to T1D0 at ‘archival’ time

m More aggressive reduction of old data from disk:o keep 2 versions + ½ of next version


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Changes to Computing Model (III)

Baseline: b Physics: 2 kHz of Trigger 10% retention in Stripping

RAW: 500 TB/year SDTS: 400 TB/pass DST: 130 TB/pass

m New: c Physicso 1 kHz of Triggero 100% retention in Strippingo 10% reduction in size after Stripping

P RAW: 250 TB/yearP MDST: 65 TB/pass

m Monte Carlo dedicated to b/c samplesP DST: 300 TB/year


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✔Average work fits well within pledge✘Peak power during full reprocessing

exceeds the average pledge

2011 Re-assessment CPU

Work2011

kHS06*y %Tier0 17 14Tier1 58 47Tier2 48 39


Power2011 Pledge

kHS06 % kHS06Tier0 27 16 21Tier1 90 55 70Tier2 48 29 48

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✔Small amount of extra disk needed✘Reduction in tape at Tier1, increase

at CERN

2011 Re-assessment Storage

Disk2011 Pledge

PB % PB

Tier0 1.9 26 1.5

Tier1 5.3 74 3.8


Tape2011 Pledge

PB % PB

Tier0 3.4 52 2.5

Tier1 3.2 48 3.9

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2012 and 2013 estimates

m Changes in 2012 with respect to 2011:

o One additional reprocessing of 2010+2011 data

o 30% increase in user activitym Changes in 2013 with respect to

2012o No LHC runningo Re-stripping of full 2010-2012 sample

in springo Reprocessing of full 2010-2012 sample

in autumno Additional simulation, using Tier0/Tier1

resources dedicated to quasi-online data processing in previous years


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2011-2013 CPU

Online Reco. & Strip.

Partial Repro.

Partial Re-strip.Full Repro.

Users Simulation


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2011-2013 CPU

Work2011 2012 2013

kHS06*y kHS06*y kHS06*yTier0 17 24 22Tier1 58 80 74Tier2 48 48 48


Power2011 2012 2013 2011

PledgekHS06 kHS06 kHS06 kHS06

Tier0 27 34 33 21Tier1 90 113 110 70Tier2 48 48 48 48

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2011–2013 Storage


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2011-2013 Storage

Disk2011 2012 2013 2011

PledgePB PB PB PB

Tier0 1.9 3.5 4.0 1.5

Tier1 5.3 9.5 11.1 3.8


Tape2011 2012 2013 2011

PledgePB PB PB PB

Tie0 3.4 6.4 7.7 2.5

Tier1 3.2 6.2 8.0 3.9

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Backup Slides


2011 Pledges

Date Site kHS06 Disk (TB) Tape (TB)

Apr’11

CERN 21 1500 2500

Tier-1 70 3817 3933

Tier-2 48


Tier1s CPU Disk Tape

Site HS06 % TB % TB %

GRIDKA 11050 17.0% 600 17.1% 590 17.0%

IN2P3 19773 30.4% 1065 30.4% 1056 30.4%

CNAF 8000 12.3% 450 12.9% 400 11.5%NIKHEF/SARA 14992 23.1% 807 23.1% 1000 28.8%

PIC 4527 7.0% 244 7.0% 242 7.0%

RAL 12090 18.6% 651 18.6% 645 18.6%

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m From: WLCGResources-2010-2012_15DEC2010.pdf

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Changes to Computing Model (IV)

m CPU efficiency:o Simulation: 80% Data Processing: 70% User Analysis: 60%

m Storage efficiency:o Disk: 70 %o Tape: 100 %


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2011 Re-assessment (w/o Charm)


No Charm

CPU Disk Tape

kHS06*y kHS06 TB TB

Tier0 15 23 1.5 2.7Tier1 50 78 4.2 2.7Tier2 48 48All 113 149 5.8 5.4

LHCb Resource requests for (2011),2012,2013

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