self-managingsystemsabird39seyeview(編輯修改稿)
2024-11-17 15:02 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 onment model ? Planning, reasoning, control (GOFAI) ? Selfanization: simplicity through simplicity ? Emergent functions through very simple cooperative behavior (biological, social metaphors) ? These two can pete with or plement each other 25 Autonomic puting architecture: a selfaware approach ? Autonomic elements ? Interaction between autonomic elements ? Building an autonomic system ? Design patterns to achieve selfmanagement 26 Selfmanaging element ? Must ? Be selfmanaging ? Be able to maintain relationships with other elements ? Meet its obligations (agreements, policies) ? Should ? Be reasonable… ? Have severel performance levels to allow optimization ? Be able to identify on its own what services it needs to fulfill its obligations 27 Selfmanaging element ? Policies ? Action policies ? If then rules ? Goal policies ? Requires selfmodel, planning, conceptual knowledge representation ? Utility function policies ? Numerical characterization of state ? Needs methods to carry out actions to optimize utility (difficult) 28 Interaction between elements ? Interfaces for ? Monitoring and testing ? Lifecycle ? Policy ? Negotiation, binding ? Relationship as an entity with a lifecycle ? Must not municate outofband, only through standard interfaces 29 Special autonomic elements for system functions ? Registry ? Meeting point for elements ? Sentinel ? Provides monitoring service ? Aggregator ? Combines other services to provide improved service ? Broker, negotiator ? Help creating plex relationships 30 Design patterns for selfconfiguration ? Registry based approach ? Submit query to registry ? Build relationship with one of the returned elements ? Register relationship in registry ? In general: discovery ? Service oriented paradigm, ontologies ? Longer term ambition: fully decentralized selfassembly 31 Design patterns for selfhealing ? Selfhealing elements: idiosyncratic ? Architectural selfhealing ? Monitor relationships and if fails, try to replace it ? Can maintain a standby service to avoid delay when switching ? Selfregenerating cluster (to provide a single service) where state is replicated 32 Design patterns for selfoptimization and selfprotection ? Selfoptimization ? Market mechanisms ? Resource arbiter (utility optimization) ? Selfprotection ? Selfhealing mechanisms work here too ? policies 33 A sidenote on the name ? Autonomic puting is bioinspired: autonomic nervous system: maintains blood pressure, adjusts heart rate, etc, without involving consciousness ? [disclaimer: I’m not a biologist…] the ANS ? Is based on a control loop, central control by specific parts of the brain (hypotalamus, sympathetic and parasympathetic systems) ? However, no reflection, selfmodel and environment model (???) ? Many functions, such as healing and regeneration are fully decentralized (no connection to central nervous system) (???) 34 Advantages of selfawareness ? Explicit knowledge representation: potentially more “intelligent” ? Better in semantically rich and diverse environments ? Plan and anticipate plex events (prediction) ? Possibility to reason about and explain own behavior and state ? More accessible administration interface ? Higher level of trust from users ? Incremental 35 Issues with selfaware appr
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