From: Near real-time optimization of fog service placement for responsive edge computing

Symbol | Definition |
---|---|

E | all edge nodes in the service topology |

F | all fog nodes in the swirl |

E_{x} | an edge node in the service topology |

|E| | the number of items in E |

F_{x} | a fog node in the service topology |

|F| | the number of items in F |

e | an edge node without a service provider |

F(e) | fog nodes ordered by distance from e |

E(F_{x}) | edge nodes serviced by F_{x} |

A | set of active fog nodes |

D_{e,f} | distance between edge node e and fog node f |

D_{e} | distances of edge node e to all fog nodes |

d | a distance according to the chosen metric |

d_{max} | maximum distance between an edge node and fog node |

R_{x,f} | current level of resource x on fog node f |

RL_{x,f} | limit for resource x on fog node f |

LL_{x,f} | lower limit for resource x on fog node f |

RD_{x} | default resource x increase for a service client |