LIGO-KAGRA CDS meeting - 6/21 8am (JST), 6/20 6pm (LLO)

Connection Info

Teamspeak (password protected page. KAGRA wiki account is necessary to view.)

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Participants

Osamu, Takahiro, Keiko, Keith, Rolf, Jamie

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Agenda

• Takahiro's slide https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=8403

• Solved issues in KAGRA
  • Timing (IRIGB issue)
  • Installation of the trend writers
  • Dolphin disable script
• Remaining issues in KAGRA
  • CPU Max issue
• LIGO's update

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Minutes

• (Trend writer) when data file is separated in multiple local SSD (?) the NDS server can read regardless of the separated files => Keith will send us his note.

• (Dolphin) There are two ways to kill the other models:
  1. Disable the links when FEs shutdown
  2. Disable the node ID to swith

     => Keith will send us documents or his note. LIGO's new Dolphin switch has remote controller over tcp/ip network.

• (CPU max) LIGO had the same experience when

  1. With intel Xion v2. Upgrading to v4 solved the problem. KAGRA will test it. => Keith will send us information of Supermicro's part number or mother board being used in LIGO.

  2. When the fiber links between an FE and IO chassis age. Symptom was dropping communications.
• LIGO's new IO chassis is PCIE gen2. Regular LC-LC fibers.

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Next meeting

TBD.