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Put Distributor hash algorithm back the way it was before 922a3b989a #1343

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Merged
bboreham merged 2 commits into from
Apr 23, 2019
Merged

Put Distributor hash algorithm back the way it was before 922a3b989a #1343

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a4afefb
Put Distributor hash algorithm back the way it was before 922a3b989a
bboreham Apr 23, 2019
6c0451a
Fix comment typos
bboreham Apr 23, 2019
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8 changes: 5 additions & 3 deletions pkg/ingester/client/fnv.go
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,7 @@ func hashNew() uint64 {
}

// hashAdd adds a string to a fnv64a hash value, returning the updated hash.
// Note this is the same algorithm as Go stdlib `sum64a.Write()`
func hashAdd(h uint64, s string) uint64 {
for i := 0; i < len(s); i++ {
h ^= uint64(s[i])
Expand All @@ -44,16 +45,17 @@ func hashAddByte(h uint64, b byte) uint64 {
return h
}

// HashNew32 initializies a new fnv64a hash value.
// HashNew32 initializies a new fnv32 hash value.
func HashNew32() uint32 {
return offset32
}

// HashAdd32 adds a string to a fnv64a hash value, returning the updated hash.
// HashAdd32 adds a string to a fnv32 hash value, returning the updated hash.
// Note this is the same algorithm as Go stdlib `sum32.Write()`
func HashAdd32(h uint32, s string) uint32 {
for i := 0; i < len(s); i++ {
h ^= uint32(s[i])
h *= prime32
h ^= uint32(s[i])
}
return h
}