ligo-ex ligo-ds
  Richardson Lab Experimental Log  Not logged in ELOG logo
Message ID: 585     Entry time: Tue Jun 3 11:50:08 2025
Author: Pooyan 
Type: Update 
Category: CDS 
Subject: CDS update 

There are three major issues with the lab's CDS system that should be addressed. They are ordered from the highest priority to the lowest.

  • CyMAC has stopped serving the fast channels (65k Hz)
    The channels are still there, and the data from the slow (16 Hz) channels is served correctly, but the fast data is not served. As a result, diagggui can not retrieve any information at the moment.
    Probably the issue is the same as the version conflict between daqd and nds2-server. After installing nds2-server on CyMAC and realizing that the conflict can not be resolved, I reverted the changes so that the CyMAC could be compatible with daqd, but there is a chance that there are still version conflicts that block the fast channels.
    I suspect that we have broken the MSC model when adding the new button. This could explain both the fasr-channels fault and the unexpected crashes.

    UPDATE 6/5
    Fixes this by rebuilding the models.
    Note for the future: The c1iop and c1msc models should be rebuilt together, even if no change has been made to c1iop.
  • The fast channels were not saved to the frames
    Reviewing the frame files showed that the daqd was only saving the 16 Hz data in the .gwf frame files. I had missed this because I only checked the existence and the integrity of the raw frame files, but never retrieved the high-frequency data itself to check it.
  • NDS2-server is installed, but does not distribute the data
    I managed to install the nds2-server and its satellite programs on the Chimay, and NFS mount the frame files on it. The server successfully chaches the channel names, frame files, and the data, but fails to list the channels for distribution.

Note: CyMAC machine was strangely disconnected from the network, and required manual reboot. I couldn't find any abnormal logs that could explain what happened.

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