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Accession Number N20130010379
Title Application Agreement and Integration Services.
Publication Date Feb 2013
Media Count 39p
Personal Author B. Hall K. Schweiker K. R. Driscoll
Abstract Application agreement and integration services are required by distributed, fault-tolerant, safety critical systems to assure required performance. An analysis of distributed and hierarchical agreement strategies are developed against the backdrop of observed agreement failures in fielded systems. The documented work was performed under NASA Task Order NNL10AB32T, Validation And Verification of Safety-Critical Integrated Distributed Systems Area 2. This document is intended to satisfy the requirements for deliverable 5.2.11 under Task 4.2.2.3. This report discusses the challenges of maintaining application agreement and integration services. A literature search is presented that documents previous work in the area of replica determinism. Sources of non-deterministic behavior are identified and examples are presented where system level agreement failed to be achieved. We then explore how TTEthernet services can be extended to supply some interesting application agreement frameworks. This document assumes that the reader is familiar with the TTEthernet protocol. The reader is advised to read the TTEthernet protocol standard (1) before reading this document. This document does not re-iterate the content of the standard.
Keywords Delivery
Failure
Fault tolerance
Protocol(Computers)
Readers
Reading
Replicas
Safety
Systems integration


 
Source Agency National Aeronautics and Space Administration
NTIS Subject Category 62 - Computers, Control & Information Theory
Corporate Author National Aeronautics and Space Administration, Hampton, VA. Langley Research Center.
Document Type Technical report
Title Note N/A
NTIS Issue Number 1319
Contract Number NNL10AB32T

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