Haystack e-VLBI Progress & Plans
Chester Ruszczyk
3Rd US VLBI Technical Meeting
Arecibo, Puerto Rico
November 30th 2007
Network Progress
• Bossnet / Glownet upgrade has been completed
– Operational November 2007
– Supports up to 10Gbps
– Present configuration
• Support for 4 antennas (2Gbps)
– 3 external antennas
– + Westford
– 10Gbps Test Point
• Between Bossnet & Glownet
– For further isolation of problems
e-VLBI Projects
• VSI-E
– Proposed standard for protocol / packet format on the network
– e-VLBI Workshop in Bonn
• Deadline was proposed at next e-VLBI workshop
– June 2008 - China
• Community – Thumbs up / Thumbs down
– VSI-E Committee restarted
• Small tiger team
– 7 community members from around the world
• Address deficiencies
• Additional features to be added
– Channel / packet
– VSI-E Software tiger team for software library completion
• 5 developers
e-VLBI Plans
• Automation of set up / tear down of dedicated
Light paths
– Follow work with the Dragon Project
• Over Glownet / Bossnet / Dragon networks.
– Expected to be completed March 2008
• Burst Mode project
– Using Mark5C Layer 2 protocol
• Transport from DBE2 to Server (10G Ethernet NIC)
– Mark5C emulator
» Sender / Receiver application
» Preliminary design doc. received 11/30/2007
– Receiver socket interface to main application
e-VLBI Plans
• Mark5 Operating System
– Upgrade to Debian “Etch”
• 2.6.18 kernel
– Initially for e-VLBI
• Take advantage of new network stack.
– Bogged down
• Jungo / Conduant
– Memory Leak
– Last telecon Nov. 2007
• Swapped method of transfer
– from Amazon to Memory
• Expect next release shortly
• Project is quantification of performance
e-VLBI Trials
• Westford / GGAO baseline real-time trial
– 2 Gbps aggregate / station
– Mark5B’s
– Target March 2008
• Westford / GGAO baseline real-time transfer
– DBE2 / Mark5C
– Target Spring / Summer 2008
• Intensive transfers – 2008
– Westford / NyAlesund / Wetzell
– first to Haystack
– then to USNO
• Fiber Connection established
Thank you