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The Use of Carrier Grade Linux in Space

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The Use of Carrier Grade Linux in Space TheThe UseUse ofof CarrierCarrier GradeGrade LinuxLinux inin SpaceSpace David Bryan The PTR Group, Inc. August 2007 AgendaAgenda What is Carrier Grade Linux? xCarrier Grade xStandards xEvolution xServices Applicability to Spacecraft A usage scenario Conclusion Small Satellite Conference 2007 WhatWhat isis CarrierCarrier Grade?Grade? From the Telecommunications Industry Carrier Grade refers to product availability xTypically 5 nines or better (99.999%) xLess than 5 minutes downtime per year Small Satellite Conference 2007 ChallengesChallenges facedfaced inin TelecomTelecom Demanding Environment xQuality of Service xHigh Availability Custom hardware Custom / Proprietary OS Upgrades and Implementation of New Services and Features xTied to proprietary vendor xLong Lead times to implement / limited development support xVery expensive Small Satellite Conference 2007 ChallengesChallenges forfor FlightFlight SoftwareSoftware Harsh environment xRadiation xLimited Resources Custom Hardware xLong Lead times xVery expensive xLimited development support Technology Gap xMoore’s Law Small Satellite Conference 2007 Solution:Solution: CarrierCarrier GradeGrade StandardsStandards Hardware Standards: ATCA xEnables development of portable software applications xOne board may be swapped for another Software Standards: Middleware xMove the autonomy requirements from the application into middleware xRequires standardized middleware interfaces Small Satellite Conference 2007 WhatWhat isis CarrierCarrier GradeGrade Linux?Linux? Linux Flight Heritage Photo Courtesy NRL Illustration Courtesy AirForce LinuxLinux OSOS Small Satellite Conference 2007 WhatWhat isis CarrierCarrier GradeGrade Linux?Linux? Promoting and Maintaining Standards HAHA MiddlewareMiddleware LinuxLinux OSOS Small Satellite Conference 2007 WhatWhat isis CarrierCarrier GradeGrade LinuxLinux Increased Mission Availability Tools, Technologies, and APIs Use of COTS processors and boards for space applications HAHA ApplicationsApplications HA Middleware LinuxLinux OSOS Small Satellite Conference 2007 CGLCGL MiddlewareMiddleware ServicesServices Service Name Feature Availability Management Fault detection, fault Framework recovery, cluster coordination Cluster Membership Infrastructure, Publish- Service Subscribe – Node joins cluster, node leaves cluster Checkpoint Assists with fault recovery – reduce downtime Event Infrastructure, Publish- Subscribe state changes Lock Infrastructure, Shared resource control Messaging Infrastructure, inter-node, intra-node messaging Information Model Standard model of cluster Management Service entities Logging Storage of data for system administrators Notification Failure notifications Small Satellite Conference 2007 AA CGLCGL BusBus Design...Design... Hardware components x Processors, Redundant Interconnects, Sensors, Actuators Software responsibilities x Command and Data Sensor Node A0 Handling Y x Sensor data manipulation Sensor Node B0 and processing X Actuator • Actuator control Sensor X’ • Inter-processor Node B1 communication Sensor Node A1 Z High Speed Interconnect Small Satellite Conference 2007 FailoverFailover ScenarioScenario Primary Sensor Node A0 X Management Node Backup Sensor Node A1 X’ High Speed Interconnect Small Satellite Conference 2007 FaultFault OccursOccurs Primary Node Fails Primary Sensor Node A0 X Management Node Backup Sensor Node A1 X’ High Speed Interconnect Small Satellite Conference 2007 FaultFault DetectionDetection Primary Fault Detected: Sensor Node A0 Node A0 Heartbeat X Management Node Backup Sensor Node A1 X’ High Speed Interconnect Small Satellite Conference 2007 FaultFault RecoveryRecovery Primary A0 Shutdown Sensor Node A0 X Management Node Backup Sensor Node A1 X’ High Speed Interconnect Small Satellite Conference 2007 MissionMission RestoredRestored Primary A1 Brought Online Sensor Node A0 as Primary X Management Node Primary Sensor Node A1 X’ High Speed Interconnect Small Satellite Conference 2007 RedundancyRedundancy RestoredRestored Backup A0 Restored as Sensor Node A0 Backup X Management Node Primary Sensor Node A1 X’ High Speed Interconnect Small Satellite Conference 2007 ConclusionConclusion Carrier Grade Linux is an enabler for high availability space applications xLow Cost - significant functionality is available out of the box xPortable - CGL is an implementation of a standard xReduces the development lead time Small Satellite Conference 2007 ForFor MoreMore InformationInformation…… Carrier Grade Linux xhttp://www.linux-foundation.org Service Availability Forum xhttp://www.saforum.org SCOPE Alliance xhttp://www.scope-alliance.org FlightLinux xhttp://www.openflightlinux.org Small Satellite Conference 2007.
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