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- W2476543262 abstract "The point of Software-Defined Infrastructure is an infrastructure that is at once more flexible, controllable, and transparent to user and developer. One important characteristic of this infrastructure is that it is not owned or controlled by the user. At runtime, it is an opaque black box. Thus, it must have guaranteed properties of both performance and function. Infrastructure also has limited visibility and debuggability. It's hard to diagnose network problems, and it's hard to diagnose runtime issues on a remote system. Thus, programs which manipulate the infrastructure (e.g., orchestration systems, SDN applications, etc.) should have their infrastructure manipulations verified, to the extent that this is possible â?A ¸S we need to catch bugs statically to the extent that we can, performance and correctness both. Fortunately, infrastructure configurations ought to be inherently verifiable. Verification of state-free systems is in NP; verification of finite-state systems, at least for safety properties, is similarly in NP It has been shown by a number of authors that OpenFlow rulesets are state-free, and verification is therefore in NP. Similar arguments can be made for various orchestration layers and workflow engines, depending on precise semantics. These results imply that the underlying model of computation for configuration of software-defined networking and at least some elements of software-defined infrastructure are state-free or, at worst, finite-state, and therefore that verification of these systems is relatively tractable. It is, at the least, not undecidable. The large challenge before the community is then to design configuration models for software-defined infrastructure that preserve the precise and weak semantics of the implementation domain; offer appropriate abstractions of performance characteristics; and nonetheless retain usability and concision." @default.
- W2476543262 created "2016-08-23" @default.
- W2476543262 creator A5038757242 @default.
- W2476543262 date "2016-05-01" @default.
- W2476543262 modified "2023-09-27" @default.
- W2476543262 title "Declarative Verifiable SDI Specifications" @default.
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- W2476543262 doi "https://doi.org/10.1109/spw.2016.49" @default.
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