Page History

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• cnf starts dab/eb ports (everyone gets CM well-known ipaddr/port via cnf.  port corresponds to platform number)
• (needs work) drp/eb nodes find their own IB addr's
• user asks for partition, sends out PLAT msg (says "who exists?") 
• all drp/eb nodes reply with their name/hostname
• CM sends ALLOC message to nodes selected for partition, e.g. 4 drp, 2 db. (says "who is participating in partition")
• eb/drp open up appropriate ephemeral ports (possibly depending on who else is in partition) and report them to the CM (response to ALLOC)
• CM sends CONNECT Messages to eb/drp nodes with assigned pseudo-random ID numbers and connection information.  ID numbers could also be communicated with ALLOC message.
• eb/drp nodes connect
• (needs work) need to add CONNECT_COMPLETE msg to send to CM
• eb/drp/control.py do their usual mainloop

...

DTI Collection Information

Collection behavior of DTI (should be implemented in the as-yet-to-be-named "blob" process).

On PLAT:

• epics prefixes
• available upstream/downstream ports

On CONNECT:

• alloc ports and connect upstream/downstream

Some details.  The epics prefixes are:

• "where" (DAQ:LAB2)
• XPM:crate#
• DTI:crate:slot

DTI port info (UDET devices, e.g. Jungfrau):

• crate/slot/port/device (device auto-detected with PGP)

XPM port info (TDET devices, e.g. hsd, tool, tes)

• crate/port/device

Issues:

• need upstream/downstream ids for detectors/KCUs
• downstream ids are 32-bit and should communicate padder, firmware type, card#
• multiple detector auto detect in 1 TDET-style KCU doesn't work trivially
• KCU firmware is detector specific
• TTOOL/TES don't currently have device detection