Emanuele Leonardi PADME General Meeting - LNF 17-18 January 2017 On-line Computing Emanuele Leonardi PADME General Meeting - LNF 17-18 January 2017

PADME on-line computing model Target 32ch FADC Spectrometer Veto 192 ch FADC High Energy Positron Veto 32ch FADC ECAL 616 ch FADC SAC 49 ch FADC TPix 65536 ch TBD L1 DAQ 1 process per DAQ board L0 DAQ 1 process per DAQ board ADC zero suppression (?) Trigger Distribution System BTF Beam Cosmics SW/Random L1 DAQ Event build Temporary disk buffer Neutral Filter (Inv) 1 or more ECAL clusters Charged Filter (Vis) 2 or more tracks RAW data Trigger signal Data flow Central Data Recording Facility CNAF (+LNF?) PADME experiment site PADME on-line computing model 17/01/2017 E. Leonardi - PADME G.M. - On-line Computing 2

DAQ data rates Detector Channels ADC boards DAQ in MB/s DAQ out Raw event KB/event Target 32 1 2.6 1.26 24.6 Calorimeter 616 20 52.8 2.70 SAC 49 2 5.3 1.08 21.1 E veto 96 3 7.9 0.60 11.6 P veto 1.31 25.6 HEP veto 1.15 22.5 TimePix 65536 - 18.8 1.50 29.3 Total 919 30 97.9 9.60 187.5 Output estimates assume that zero-suppression is active, include trigger ADC samples (25%) and a 1% autopass stream (10%), and do not include ROOT data-compression factor (testbeam: ≈50%) 17/01/2017 E. Leonardi - PADME G.M. - On-line Computing

E. Leonardi - PADME G.M. - On-line Computing L0 DAQ system Data acquisition + Zero suppression (?) 2 DAQ servers directly connected to ADC boards Each server will mount 2 CAEN A3818 optical boards CAEN will provide 4 A3818 with the ADC boards Current server: HP Proliant DL560 gen 8 (2015) Now available from CONSIP: HP Proliant DL560 gen 9 Possible alternative: DELL PowerEdge R630 Cheaper (-30%) but less performant/expandable 17/01/2017 E. Leonardi - PADME G.M. - On-line Computing

E. Leonardi - PADME G.M. - On-line Computing L1 DAQ system DAQ data buffer + Event build + Event filters I/O bound in: L0 data, local: DAQ→RAW out: RAW to CNAF/LNF Storage requirements depend on zero suppression Zero suppression on-line → 1-2 TB/day Zero suppression off-line → ≈ 10 TB/day 17/01/2017 E. Leonardi - PADME G.M. - On-line Computing

Server Dell PowerEdge R730xd 2 CPU Xeon E5-2630L v3 8 core 64 GB RDIMM 2 x 300 GB RAID1 (system) + 22 x 1 TB RAID5 (storage) 2 x 10 Gbps Ethernet 2 servers → 2-10 days of data buffer 17/01/2017 E. Leonardi - PADME G.M. - On-line Computing

Local Network Infrastructure Ethernet switch 48 × 1Gbps + 4 × 10Gbps (e.g. HPE 5130) 8 × 1Gbps: L0 servers (4x1Gbps trunking if needed) 2 × 10Gbps: L1 servers 1 × 10Gbps: uplink to LNF-IT n × 1Gbps: other services (DCS, Trigger, HV, …) Will buy 2 switches for redundancy/backup 17/01/2017 E. Leonardi - PADME G.M. - On-line Computing

E. Leonardi - PADME G.M. - On-line Computing Other infrastructure The whole online system (servers+switches) fits in 1 rack Airflow/air conditioning must be guaranteed (should be easy) UPS? Network cabling depends on the positioning of L0/L1 systems In/near experimental area Need to setup 10Gbps fiber link to LNF-IT Connectivity to Trigger system 17/01/2017 E. Leonardi - PADME G.M. - On-line Computing

2017 buying list 2 L0 servers (HP Proliant or Dell PowerEdge) 10-15K€ 2 L1 servers (Dell PowerEdge) 20-30K€ 2 Network Switches (HPE 5130) 4-6K€ Rack & cabling 0-2K€ All HW to be ordered before summer 17/01/2017 E. Leonardi - PADME G.M. - On-line Computing

E. Leonardi - PADME G.M. - On-line Computing DAQ software update Improved zero-suppression algorithm Channel is accepted if RMS is large Total number of events per run is written to DB New web interface to Padme DB http://www.lnf.infn.it/acceleratori/padme/php/query_run.php 17/01/2017 E. Leonardi - PADME G.M. - On-line Computing