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btindex: use off-heap EliasFano during build #21800

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AskAlexSharov wants to merge 1 commit into from
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btindex: use off-heap EliasFano during build #21800

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7 changes: 6 additions & 1 deletion db/datastruct/btindex/btree_index.go
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Original file line number Diff line number Diff line change
Expand Up @@ -270,7 +270,12 @@ func (btw *BtIndexWriter) Build() error {
log.Log(btw.args.Lvl, "[index] calculating", "file", btw.indexFileName)

if btw.keysWritten > 0 {
btw.ef = eliasfano32.NewEliasFano(btw.keysWritten, btw.maxOffset)
efBuilder, err := eliasfano32.NewEliasFanoOffHeap(btw.keysWritten, btw.maxOffset, btw.args.TmpDir)
if err != nil {
return fmt.Errorf("[index] create offheap ef: %w", err)
}
defer efBuilder.Close()
btw.ef = efBuilder.EliasFano

nodes := make([]Node, 0, btw.keysWritten/btw.args.M)
var ki uint64
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1 change: 1 addition & 0 deletions db/datastruct/btindex/btree_index_test.go
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Expand Up @@ -400,6 +400,7 @@ func TestNewBtIndex(t *testing.T) {
require.NotNil(t, bt)
bplus := bt.bplus
require.GreaterOrEqual(t, len(bplus.mx), keyCount/int(DefaultBtreeM))
require.LessOrEqual(t, len(bplus.mx), keyCount/int(DefaultBtreeM)+2)

for i := 1; i < len(bt.bplus.mx); i++ {
require.NotZero(t, bt.bplus.mx[i].di)
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