1. Computing Model di PANDA:
Stato e prospettive
Stefano Spataro
ISTITUTO NAZIONALE
DI FISICA NUCLEARE
Sezione di Torino
Mercoledì, 28 Maggio 2014

2. GSI The FAIR Facility Darmstadt (Germany)
Facility for
Antiproton and
Ion
Research
In the incoming future (taking data from 2018) …

3. Well, not so distant future…
forest
forest
GSI
???
forest

4. Multi purpose detector at FAIR
The Panda experiment
AntiProton Annihilations at Darmstadt
pp, pA collisions
1.515 GeV/c (p momentum)
Multi purpose detector at FAIR
Darmstadt (Germany)
GSI
Facility for
Antiproton and
Ion
Research
Charmonium (cc) spectroscopy
Open charm spectroscopy
Search for gluonic excitations
(hybrids - glueballs)
Charmed hadrons in nuclei
Drell-Yan
Single and double Hypernuclei
Parton Dist., EM Form Factor…
2017: Detector Assembly
2018: First Data taking

5. The Panda Collaboration
More than 410 physicists from more than 54 institutions in 17 countries

6. The Panda Italy Collaboration
Ferrara (INFN, UNIFE)
Frascati (LNF)
Genova (INFN, UNIGE)
Legnaro (LNR)
Pavia (INFN, UNIPV)
Torino (INFN, POLITO, UNITO)
Trieste (INFN, UNITS)
People: 49
FTE: 19
2014)
Deputy Spokeperson (D.Bettoni)
Physics Coordinator (P.Gianotti)
Computing Coordinator (me)
PANDA is not officially funded yet

7. Panda Italy Involvement
Target
Straw Tube Tracker
Micro Vertex Detector
Computing
Forward Tracking
Stations
Muon System
Hypernuclei Setup

8. PandaGrid: an Alien2-based GRID
It can run on all platforms (source distribution)
Several Panda institutions were hosting Alien sites
Why Alien?
“Reuse” of currently existing manpower
Use of parts of already existing resources
Strong collaboration with Alien developers
Beta-tester
(now 2.20)
Successfully used for:
Central Tracker TDR
MVD TDR
Many Analyses

9. Bucharest 40 cores Chicago 100 cores GSI 200 cores Dubna 100 cores
Lightweight Directory Access Protocol (LDAP) GSI
MySQL DataBases (DB) GSI, Torino
AliEn2 Central Services (CS) GSI
PANDA GRID MonaLisa (ML) Torino
Bucharest cores
Chicago cores
GSI 200 cores
Dubna 100 cores
Juelich cores
KVI 100 cores
Mainz cores
Torino cores
Torino-2G 150 cores
Vienna 70 cores

10. The Italian Sites Torino Pure Alien site PBS queue 38 cores SE 40 TB
Torino-2G
to INFNGrid
LCG VO-Box
150 cores
no SE
Initially Sending Panda jobs to the Alice node
Recently buying machines for the Torino Private cloud
CNAF

11. The @ Torino CdC
Torino Private Cloud
PandaGrid
S. Bagnasco et al.

12. Torino 9%
Last year
Torino-2G 11%
Last week

13. What is now the future of our distributed computing?
Alien3?
PanDa?
Big batch farm?
No further developments for Alien2
Still some time before taking decisions for PandaGrid
Well, not so much time…
Currently a FAIR Computing TDR is under preparation
66k cores
12PB disks
12PB/year tape
PANDA requirements
calculated in 2008
new calculations are needed
New technologies should be included (FPGAs, GPUs, many-core CPUs)

14. Distributed T0/T1 centre embedded in Grid/Cloud
APPA
CBM
LQCD
NuStar
Panda (66k cores,12PB disks,12PB/y tape)
in 2018
cores + grid
40 PB disk
40PB/y archive

15. Triggerless Data Acquisition
Interaction rates of 20 MHz (50 MHz peak)
Event size of 15 kB
Data rates after front end preprocessing: 80GB/s ‐ 300GB/s
H.Xu, TIPP2011, Chicago
Ipeak/Iavg ≈ 2-2.5

16. Perspectives
The PANDA Computing model is currently under design (just started)
With the other FAIR experiments  joint computing TDR (end 2015?)
Need for a distributed computing scheme, new middleware?
Online computing is becoming important and it merges with offline
Computing Model
The MONARC model good starting point but must be updated by new technologies
Grid, Cloud, Proof, computing on FPGAs and on GPUs…
Multi-core CPUs and many-core GPUs → importance of scalable software
More democratic and flexible models → Italy can play an important role!