Reports until 16:25, Wednesday 23 April 2025
H1 DAQ
jonathan.hanks@LIGO.ORG - posted 16:25, Wednesday 23 April 2025 (84095)
WP 12469 cont., replaced hardware used for h1daqfw2 to increase available memory
Jonathan, Dave,

We replaced the hardware that is running h2daqfw2 today.  This was done to put in a system that had more memory.  We pulled a spare daq unit out of the test stand (most recently named x6dc0).  While doing that we swapped the memory with a broken daqd system, so that the new h2daqfw2 now has 256GB of ram.  The system is up and running again, I'm tracking the setup in puppet so that we have a low rebuild time.

This was done to support investigating differences between the frames generated on h1daqfw[01] and hqdaqfw2.  I need to be able to run modified versions of daqd to see some of the internal state that is not exposed to be able to understand and fix differences in encoding of the frames.  When I ran daqd on the old hardware, it ran out of memory, even after reducing buffer sizes.