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[feature] allow for an odd number of erasure packs (#9221)

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Too many deployments come up with an odd number
of hosts or drives, to facilitate even distribution
among those setups allow for odd and prime numbers
based packs.
This commit is contained in:
Harshavardhana
2020-03-31 09:32:16 -07:00
committed by GitHub
parent 90c365a174
commit 30707659b5
15 changed files with 74 additions and 299 deletions
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4
cmd/endpoint-ellipses.go
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@@ -40,7 +40,7 @@ type endpointSet struct {
// Supported set sizes this is used to find the optimal
// single set size.
var setSizes = []uint64{4, 6, 8, 10, 12, 14, 16}
var setSizes = []uint64{4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}
// getDivisibleSize - returns a greatest common divisor of
// all the ellipses sizes.
@@ -60,7 +60,7 @@ func getDivisibleSize(totalSizes []uint64) (result uint64) {
// isValidSetSize - checks whether given count is a valid set size for erasure coding.
var isValidSetSize = func(count uint64) bool {
return (count >= setSizes[0] && count <= setSizes[len(setSizes)-1] && count%2 == 0)
return (count >= setSizes[0] && count <= setSizes[len(setSizes)-1])
}
// getSetIndexes returns list of indexes which provides the set size