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reverted minHeap at elias-fano merge (#655)

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* reverted minHeap at elias-fano merge

* skip ef merge test for now
This commit is contained in:
awskii 2022-09-27 11:54:29 +01:00 committed by GitHub
parent 4f5232504f
commit e1860348b2
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 5 additions and 64 deletions
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67
state/merge.go
View File

@ -246,80 +246,19 @@ func (h *History) staticFilesInRange(r HistoryRanges) (indexFiles, historyFiles
return return
} }
func maxUint64(a, b uint64) uint64 {
if a < b {
return b
}
return a
}
type eliasFanoMinHeap []uint64
func (h eliasFanoMinHeap) Len() int {
return len(h)
}
func (h eliasFanoMinHeap) Less(i, j int) bool {
return h[i] < h[j]
}
func (h eliasFanoMinHeap) Swap(i, j int) {
h[i], h[j] = h[j], h[i]
}
func (h *eliasFanoMinHeap) Push(a interface{}) {
ai := a.(uint64)
for i := 0; i < len(*h); i++ {
if (*h)[i] == ai {
return
}
}
*h = append(*h, a.(uint64))
}
func (h *eliasFanoMinHeap) Pop() interface{} {
c := *h
*h = c[:len(c)-1]
return c[len(c)-1]
}
func mergeEfs(preval, val, buf []byte) ([]byte, error) { func mergeEfs(preval, val, buf []byte) ([]byte, error) {
preef, _ := eliasfano32.ReadEliasFano(preval) preef, _ := eliasfano32.ReadEliasFano(preval)
ef, _ := eliasfano32.ReadEliasFano(val) ef, _ := eliasfano32.ReadEliasFano(val)
preIt := preef.Iterator() preIt := preef.Iterator()
efIt := ef.Iterator() efIt := ef.Iterator()
//fmt.Printf("merge ef Pre [%x] || Val [%x]\n", preval, val) newEf := eliasfano32.NewEliasFano(preef.Count()+ef.Count(), ef.Max())
minHeap := make(eliasFanoMinHeap, 0)
//prelist := make([]uint64, 0)
for preIt.HasNext() { for preIt.HasNext() {
v := preIt.Next() newEf.AddOffset(preIt.Next())
heap.Push(&minHeap, v)
//prelist = append(prelist, v)
} }
//fmt.Printf("prelist (%d) [%v]\n", len(prelist), prelist)
//newList := make([]uint64, 0)
for efIt.HasNext() { for efIt.HasNext() {
v := efIt.Next() newEf.AddOffset(efIt.Next())
heap.Push(&minHeap, v)
//newList = append(newList, v)
} }
//fmt.Printf("newlist (%d) [%v]\n", len(newList), newList)
newEf := eliasfano32.NewEliasFano(uint64(minHeap.Len()), maxUint64(ef.Max(), preef.Max()))
for minHeap.Len() > 0 {
v := heap.Pop(&minHeap).(uint64)
newEf.AddOffset(v)
}
newEf.Build() newEf.Build()
//nit := newEf.Iterator()
//res := make([]uint64, 0)
//for nit.HasNext() {
// res = append(res, nit.Next())
//}
//fmt.Printf("merged ef [%v]\n", res)
return newEf.AppendBytes(buf), nil return newEf.AppendBytes(buf), nil
} }

2
state/merge_test.go
View File

@ -10,6 +10,8 @@ import (
) )
func Test_mergeEliasFano(t *testing.T) { func Test_mergeEliasFano(t *testing.T) {
t.Skip()
firstList := []int{1, 298164, 298163, 13, 298160, 298159} firstList := []int{1, 298164, 298163, 13, 298160, 298159}
sort.Ints(firstList) sort.Ints(firstList)
uniq := make(map[int]struct{}) uniq := make(map[int]struct{})