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9d7ae40003
true -> always send to peer false -> use ledger-based strategy described in IPFS paper draft 3
35 lines
687 B
Go
35 lines
687 B
Go
package strategy
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import (
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"math"
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"math/rand"
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)
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type strategyFunc func(*ledger) bool
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// TODO avoid using rand.Float64 method. it uses a singleton lock and may cause
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// performance issues. Instead, instantiate a rand struct and use that to call
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// Float64()
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func standardStrategy(l *ledger) bool {
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return rand.Float64() <= probabilitySend(l.Accounting.Value())
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}
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func yesManStrategy(l *ledger) bool {
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return true
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}
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func probabilitySend(ratio float64) float64 {
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x := 1 + math.Exp(6-3*ratio)
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y := 1 / x
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return 1 - y
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}
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type debtRatio struct {
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BytesSent uint64
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BytesRecv uint64
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}
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func (dr *debtRatio) Value() float64 {
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return float64(dr.BytesSent) / float64(dr.BytesRecv+1)
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}
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