Difference between revisions of "OWG Meeting 7-Nov-2012"

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==Minutes==
 
==Minutes==
 +
 +
Present:  Elliott W, Simon T, Dave L, Bruyan M, Hovanes E, Elton S.
 +
 +
 +
'''Simulated Raw Data'''
 +
 +
Elliott gave a detailed report on the status of running Dave A's mc2coda package in conjunction with the Hall D MC to produce simulated raw event files, see the slides for full details.  This study is ongoing, but highlights include:
 +
 +
* mc2coda currently simulates N=1 block mode readout, a verbose and redundant format needed by CODA to catch errors.
 +
* Get x4 reduction in size by eliminating redundancies and unneeded information, low-L events average under 8 kB.
 +
* Still can gzip files by 60%, not sure why, perhaps lots of empty bytes in the upper range of ADC and TDC values.
 +
* Tape drives compress data so gzip'ing files will not save on tapes.
 +
* A number of anomalies exist in the energy and time values, Simon and others will have a look.
 +
* Dave L is producing a high-L data file.
 +
* mc2coda runs at about 180 Hz on low-L simulated data.
 +
* Eventually want to reconstruct events from EVIO data and verify same results as from original HDDM data.
 +
 +
 +
 +
'''Counting House'''
 +
 +
Hovanes and Elliott reported on a number of items:
 +
 +
* The UPS is on and we need to turn on the RDC and some branch circuits.
 +
* The network switch is programmed for Hall D networks.
 +
* Facilities will come up with a proposal for furniture and console layout for the conference and controls rooms.
 +
* We need to begin thinking about purchasing computers, file servers, RAID system, Infiniband equipment, etc.
 +
 +
 +
 +
'''EPICS'''
 +
 +
* Still no luck inviting people from Yerevan or MEPHI.
 +
* Hovanes created the IOC for the solenoid test based on an XML dump of the PLC program.
 +
* Beni needs a CAEN HV control system and GUI for the FDC tests.
 +
 +
 +
 +
'''EVIO'''
 +
 +
Elliott and Carl are upgrading EVIO to provide more stream functionality, i.e. data access without having to create a full in-memory object model of the data.  CLAS12 needs this, it will be useful for us as well.
 +
 +
 +
 +
'''DAQ'''
 +
 +
* Do we need our own DHCP server?  We're hoping to use the one maintained by the CC.
 +
* Bryan M. will help with setting up the ROC hardware and operating system.
 +
* We hope to get some farm nodes from the CC for initial testing in the counting house (later...we will get 4 x 16 cores Wed 14-Nov).
 +
* The ROC purchase is split, first order is for 15 boards, 10 weeks delivery, 7 or 8 for us.
 +
* The "smoked" ROC was replaced by the vendor (finally!).

Revision as of 15:36, 9 November 2012

Agenda

  • Announcements
    • Ed will talk more on FPGA programming in Nov
    • Labview/EPICS training next week
  • Review of minutes from 24-Oct-2012 meeting
  • More on Simulated Raw Event Data - Elliott
    • hit data
    • event sizes and compression
    • processing rate
      • is single slot header word adequate?
  • Counting House status - Hovanes, Elliott
    • Furniture
    • Switch and networks
    • UPS
  • EPICS - Hovanes
  • Controls - Elliott, Hovanes
    • Solenoid test review 6-Nov
    • EPICS to PLC connection
    • PLC and EPICS archiving
    • Elog
  • JInventory database - Elliott
    • conventions
    • Hall A (Alexandre C)
  • DAQ group projects- Bryan, Dave A, Graham, Carl, Vardan, Elliott
    • EVIO stream parser functions
    • CODA3, EVIO, ECS/CSS, disentangler, readout list, Java/cMsg GUI
  • Electronics, trigger and DAQ status reports - Chris, Alex, Dave, Fernando, Ben, Ed, William, Bryan
  • Mantis Task Tracker
  • Midas Elog]]


  • Calibration/Alignment issues?


Time/Location

1:30 PM Wed 7-Nov-2012 CC F326


Announcements

Next Meeting

1:30 PM Wed 21-Nov-2012 CC F326


Minutes

Present: Elliott W, Simon T, Dave L, Bruyan M, Hovanes E, Elton S.


Simulated Raw Data

Elliott gave a detailed report on the status of running Dave A's mc2coda package in conjunction with the Hall D MC to produce simulated raw event files, see the slides for full details. This study is ongoing, but highlights include:

  • mc2coda currently simulates N=1 block mode readout, a verbose and redundant format needed by CODA to catch errors.
  • Get x4 reduction in size by eliminating redundancies and unneeded information, low-L events average under 8 kB.
  • Still can gzip files by 60%, not sure why, perhaps lots of empty bytes in the upper range of ADC and TDC values.
  • Tape drives compress data so gzip'ing files will not save on tapes.
  • A number of anomalies exist in the energy and time values, Simon and others will have a look.
  • Dave L is producing a high-L data file.
  • mc2coda runs at about 180 Hz on low-L simulated data.
  • Eventually want to reconstruct events from EVIO data and verify same results as from original HDDM data.


Counting House

Hovanes and Elliott reported on a number of items:

  • The UPS is on and we need to turn on the RDC and some branch circuits.
  • The network switch is programmed for Hall D networks.
  • Facilities will come up with a proposal for furniture and console layout for the conference and controls rooms.
  • We need to begin thinking about purchasing computers, file servers, RAID system, Infiniband equipment, etc.


EPICS

  • Still no luck inviting people from Yerevan or MEPHI.
  • Hovanes created the IOC for the solenoid test based on an XML dump of the PLC program.
  • Beni needs a CAEN HV control system and GUI for the FDC tests.


EVIO

Elliott and Carl are upgrading EVIO to provide more stream functionality, i.e. data access without having to create a full in-memory object model of the data. CLAS12 needs this, it will be useful for us as well.


DAQ

  • Do we need our own DHCP server? We're hoping to use the one maintained by the CC.
  • Bryan M. will help with setting up the ROC hardware and operating system.
  • We hope to get some farm nodes from the CC for initial testing in the counting house (later...we will get 4 x 16 cores Wed 14-Nov).
  • The ROC purchase is split, first order is for 15 boards, 10 weeks delivery, 7 or 8 for us.
  • The "smoked" ROC was replaced by the vendor (finally!).
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