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Setup on detector-PC

Get hidra

• login as user root
• use frozen HiDRA version 4.0.7

• download HiDRA from http://nims.desy.de/extra/hidra/freeze/linux/

• unpack HiDRA into /opt

  Code Block
  tar -xzvf hidra-v4.0.7-x86_64-2.7-suse10.2.tar.gz -C /opt

  
  

• For version 4.x and newer there is an option in the config file to handle monitored sub-directory creation inside the source directory:

  Code Block
  language bash
  eventdetector: inotify_events: create_fix_subdirs =: True

  For hidra versions 3.x and older:

  Create source directory where the data is written to

  Code Block
  language bash
  mkdir /ramdisk/local mkdir -p /ramdisk/current/raw mkdir -p /ramdisk/current/scratch_bl mkdir -p /ramdisk/commissioning/raw mkdir -p /ramdisk/commissioning/scratch_bl

  
  

• Create log directory

  Code Block
  mkdir -m 777 /var/log/hidra

  
  

Configure

• the configuration file can be found  in <unpacked_dir>/hidra/conf (e.g. when done as described above: /opt/hidra/conf)

• adjust hidra config file, e.g for beamline p00

  Code Block
  title conf/datamanager_p00.conf
  general: log_path =: /var/log/hidra log_name =: datamanager_p00.log procname = procname: hidra_p00 eventdetector: inotify_events: monitored_dir: = /ramdisk fixed_subdirs =: ["commissioning/raw", "commissioning/scratch_bl", "current/raw", "current/scratch_bl", "local"] datafetcher: use_data_stream =: True data_stream_targets =: [["asap3-p00", 50100]] remove_data =: True

  You may think on changing permissions of datamanager_p00.conf to read-only
  Alternatively (for version > 4.0:

  Code Block
  remove_data =: stop_on_error

  or

  Code Block
  remove_data =: with_confirmation

  
  

Run

• login as user det

• run sender

  Code Block
  /opt/hidra/hidra.sh start --beamline <beamline>

  what the script does is following:

  • export library path
  • creating log-dir (/var/log/hidra) + change permissions of log-dir to 1777
  • starts hidra daemon

Setup on receiver-PC

Get hidra

from git

• clone git repo into /opt 

  Code Block
  /opt/hidra

  
  

• Create log directory + change permissions

  Code Block
  language bash
  mkdir /var/log/hidra chmod 1777 /var/log/hidra

  
  

from repo

• on all Debian beamline PCs hidra can be installed via apt

  Code Block
  apt install hidra-receiver

  
  

Configure

• adjust hidra config file, e.g. for beamline p00

  Code Block
  title conf/datareceiver_p00.conf
  general: log_path =: /var/log/hidra log_name =: datareceiver_p00.log username = username: p00user procname = procname: hidra_receiver_p00 whitelist = whitelist: a3p00-hosts datareceiver: target_dir =: /beamline/p00 data_stream_ip =: asap3-p00

  TODO: set target_dir to /beamline/pxx

Run

• run receiver

  Code Block
  systemctl start hidra-receiver@p00