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look back when adding to sorted values

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look back when adding to sorted values, before adding it to overflow
This commit is contained in:
Chris Lu 2021-06-28 22:46:49 -07:00
parent fc8dd58aea
commit 24e11d1e90
2 changed files with 25 additions and 5 deletions
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20
weed/storage/needle_map/compact_map.go
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@ -64,11 +64,31 @@ func (cs *CompactSection) Set(key NeedleId, offset Offset, size Size) (oldOffset
needOverflow := cs.counter >= batch
needOverflow = needOverflow || cs.counter > 0 && cs.values[cs.counter-1].Key > skey
if needOverflow {
lookBackIndex := cs.counter - 128
if lookBackIndex < 0 {
lookBackIndex = 0
}
if cs.counter < batch && cs.values[lookBackIndex].Key < skey {
// still has capacity and only partially out of order
p := &cs.values[cs.counter]
p.Key, cs.valuesExtra[cs.counter].OffsetHigher, p.OffsetLower, p.Size = skey, offset.OffsetHigher, offset.OffsetLower, size
//println("added index", cs.counter, "key", key, cs.values[cs.counter].Key)
for x := cs.counter - 1; x >= lookBackIndex; x-- {
if cs.values[x].Key > cs.values[x+1].Key {
cs.values[x], cs.values[x+1] = cs.values[x+1], cs.values[x]
cs.valuesExtra[x], cs.valuesExtra[x+1] = cs.valuesExtra[x+1], cs.valuesExtra[x]
} else {
break
}
}
cs.counter++
} else {
//println("start", cs.start, "counter", cs.counter, "key", key)
if oldValueExtra, oldValue, found := cs.findOverflowEntry(skey); found {
oldOffset.OffsetHigher, oldOffset.OffsetLower, oldSize = oldValueExtra.OffsetHigher, oldValue.OffsetLower, oldValue.Size
}
cs.setOverflowEntry(skey, offset, size)
}
} else {
p := &cs.values[cs.counter]
p.Key, cs.valuesExtra[cs.counter].OffsetHigher, p.OffsetLower, p.Size = skey, offset.OffsetHigher, offset.OffsetLower, size

2
weed/storage/needle_map/compact_map_cases_test.go
View file

@ -22,7 +22,7 @@ func Test5bytesIndexLoading(t *testing.T) {
println("total entries:", rowCount)
key := types.NeedleId(0x671b905)
key := types.NeedleId(0x671b905) // 108116229
needle, found := m.Get(types.NeedleId(0x671b905))