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SMASTA+ 1.1

Maxime MORGE requested to merge smacrhul/smastaplus:master into master

A distributed system contains:

  • a pool of computing nodes available within the infrastructure which can be activated in order to process the tasks;
  • some resource nodes since each task requires resources which are distributed across different resource nodes.

We consider :

We consider the following operations:

  • a deal between contractors (i.e. computing nodes involved) which exchanges some lists of tasks within a stap instance;
  • a task consumption;
  • an activation of a computing node modifies the set of active computing nodes and so, the time-extended allocation is also updated since the recently activated node is associated with an empty bundle;
  • a deactivation of a computing node modifies the set of active computing nodes and so the time-extended allocation. A node must be associated with an empty bundle in order to be deactivated.

A time-extended allocation is an assignment of the tasks to some computing nodes. Its delay is the time since the initial boot time of the distributed system.

A configuration (at time t) represents a specific task allocation for a non-empty set of computing nodes.

A load-balancer returns an allocation with the aim of making it optimal with respect to a social rule

A scaler returns a configuration with the aim of making it minimal according to the QoS constraints.

We propose a first scaler based on PyDCOP.

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