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Package haizea :: Package pluggable :: Package policies :: Module preemption :: Class ARPreemptsEverythingPolicy
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Class ARPreemptsEverythingPolicy

source code

A simple preemption policy where AR leases can always preempt every other type of lease. Given two possible leases to preempt, the "youngest" one is preferred (i.e., the one that was most recently submitted).

Instance Methods [hide private]
 
__init__(self, slottable)
Constructor		 source code
 
get_lease_preemptability_score(self, preemptor, preemptee, time)
Computes the lease preemptability score		 source code

Inherited from core.scheduler.policy.PreemptabilityPolicy (private): _get_aging_factor

Inherited from object: __delattr__, __format__, __getattribute__, __hash__, __new__, __reduce__, __reduce_ex__, __repr__, __setattr__, __sizeof__, __str__, __subclasshook__

Properties [hide private]

Inherited from object: __class__

Method Details [hide private]

__init__(self, slottable)
(Constructor)

source code 

Constructor

Argument slottable -- A fully constructed SlotTable

Overrides: object.__init__

get_lease_preemptability_score(self, preemptor, preemptee, time)

source code 

Computes the lease preemptability score

See class documentation for details on what policy is implemented here. See documentation of PreemptabilityPolicy.get_lease_preemptability_score for more details on this function.

Arguments: preemptor -- Preemptor lease preemptee -- Preemptee lease time -- Time at which preemption would take place

Overrides: core.scheduler.policy.PreemptabilityPolicy.get_lease_preemptability_score

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