PADME General Meeting - On-line Computing Overview
Explore the on-line computing aspects discussed at the PADME General Meeting, covering topics such as spectrometer veto, DAQ data rates, L0 and L1 DAQ systems, and server specifications for efficient data processing and storage.
Download Presentation
Please find below an Image/Link to download the presentation.
The content on the website is provided AS IS for your information and personal use only. It may not be sold, licensed, or shared on other websites without obtaining consent from the author. If you encounter any issues during the download, it is possible that the publisher has removed the file from their server.
You are allowed to download the files provided on this website for personal or commercial use, subject to the condition that they are used lawfully. All files are the property of their respective owners.
The content on the website is provided AS IS for your information and personal use only. It may not be sold, licensed, or shared on other websites without obtaining consent from the author.
E N D
Presentation Transcript
On-line Computing Emanuele Leonardi PADME General Meeting - LNF 17-18 January 2017
Spectrometer Veto 192 ch FADC High Energy Positron Veto 32ch FADC Target 32ch FADC ECAL 616 ch FADC SAC 49 ch FADC TPix 65536 ch TBD BTF Beam Trigger Distribution System L1 DAQ L0 DAQ Cosmics 1 process per DAQ board 1 process per DAQ board ADC zero suppression (?) SW/Random L1 DAQ Event build RAW data Temporary disk buffer Central Data Recording Facility CNAF (+LNF?) Trigger signal Charged Filter (Vis) 2 or more tracks Data flow PADME on-line computing model PADME experiment Neutral Filter (Inv) 1 or more ECAL clusters E. Leonardi - PADME G.M. - On-line Computing site 2 17/01/2017 2
DAQ data rates Detector Channels ADC boards DAQ in MB/s DAQ out MB/s Raw event KB/event Target 32 1 2.6 1.26 24.6 Calorimeter 616 20 52.8 2.70 52.8 SAC 49 2 5.3 1.08 21.1 E veto 96 3 7.9 0.60 11.6 P veto 96 3 7.9 1.31 25.6 HEP veto 32 2 2.6 1.15 22.5 TimePix 65536 - 18.8 1.50 29.3 Total 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%) 919 30 97.9 9.60 187.5 3 17/01/2017 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 4 17/01/2017 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 5 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 6 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 7 17/01/2017 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 8 17/01/2017 E. Leonardi - PADME G.M. - On-line Computing
2017 buying list 2 L0 servers (HP Proliant or Dell PowerEdge) 2 L1 servers (Dell PowerEdge) 2 Network Switches (HPE 5130) Rack & cabling 10-15K 20-30K 4-6K 0-2K All HW to be ordered before summer 9 17/01/2017 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 10 17/01/2017 E. Leonardi - PADME G.M. - On-line Computing
