HOWTO: Copying Mark6 modules

Introduction

This page describes how to copy experiment data from multiple Mark6 modules for two scenarios:

• Case1: copying to a single module
• Case2: copying onto a set of 4 modules

The copying is done via the 10Gbps ethernet interface of the Mark6 recorders. At PV the following ethernet devices are used for coying:

recorder1     eth2    172.16.2.1
recorder2     eth2    172.16.2.2     eth4  172.16.4.2
recorder3     eth2    172.16.2.3     eth4  172.16.4.3
recorder4     eth2    172.16.2.4

recorder1-----eth2-----recorder2
                           |                           |
                           |
                          eth4
                           |
                           |
recorder4-----eth2------recorder3                              

Prerequisits

The Mark6 units should be in the state they were in at the time of the observation with the modules installed in the same slots as before, and their disks mounted.

Copying

1. on the destination recorder go to /home/oper/collect
2. in case no file collect._scans.conf  exists create it with the following content

   [collect_scans]
   # module=all to copy to a set of 4 modules
   # module={slot} to copy to the module in slot number {slot}
   module=all
   
   #recorders is a space limited list of the source recorder IPs
   # use:
   # 172.16.2.29 for recorder1
   # 172.16.4.30 for recorder2
   # 172.16.2.28 for recorder3
   # 172.16.4.37 for recorder4
   recorders=1.2.3.4 5.6.7.8
   
   # scans is a space limited list of scan names as recorded 
   # on the module (but excluding the vdif extension)
   scans=eXXaYY_ZZ_HHH-MMMM eXXaYY_ZZ_HHH-MMMM
   
   # target is the name of the directory on the destination modules
   # that will hold the copied data
   target=collected
   

3. Edit the collect._scans.conf  according to the above instructions
4. execute the copying

collect_scans.py -c collect_scans.conf -q -v