Transcript NEPTUNE SYSTEM DESIGN PHILOSOPHY

NEPTUNE SYSTEM DESIGN
PHILOSOPHY
David H Rodgers
August 20, 1999
NEPTUNE System Design Philosophy
• The system design is independent of the
management or funding of network operations
• NEPTUNE is conceptually divided into two parts:
– the core system, providing power,
communications, navigation, archiving, data
distribution, etc. (cf. report para??)
– PI proposed and developed instrumentation,
supported by the core system but independently
developed consistent with well defined
interfaces
NEPTUNE System Design Philosophy
• The useful life of the NEPTUNE core system is at
least 25 years, with 24/7 availability, once
operational
• Data return probability is better than 0.999.
• NEPTUNE provides high bandwidth and power as a
matter of policy - 5Gbps//100kW
• All data will be archived at, and distributed from, a
central point where CAL corrections are performed
• NEPTUNE will have auto reconfiguration capability
NEPTUNE System Design Philosophy
• The core system design will:
– use hardware/software that is expected to be available
in the 2003/04 timeframe
– be upgraded as technology evolves, in a manner largely
transparent to the users
– use an internet based approach for data and
commanding - basically a “point & click”, “PlugNPlay”
approach
– have uniform, well defined interface standards,
guidelines for implementation and network simulation
hardware/software.
NEPTUNE System Design Philosophy
• The core system design will:
– Use COTS capabilities as much as practical to
minimize costs and the cost/schedule risks
associated with new developments
– be single point failure tolerant
– perform self reconfiguration as needed to
prevent error/failure propagation
– recognize predefined “events” and initiate
action sets, including reconfiguration, on the
occurrence of such events - e.g. a seafloor
eruption
NEPTUNE System Design Philosophy
• Operations & Maintenance:
– Routine operation & maintenance of the core
facility will be transparent to the users except in
emergency conditions
– In Emergencies:
• users will be notified - internet/phone
• priority is for personnel and network safety decisions will be made on this basis
• corrective action to restore network will not be
transparent to users
NEPTUNE System Design Philosophy
• Operations & Maintenance (cont.):
– Installation and removal of PI experiments will
be scheduled in agreement between the network
and the PI
– Safety Protocol - No manned operation shall be
planned in such a manner that a network failure
can prejudice personnel safety