Use proto reader iterator when proto enabled

Author: justinjc

src/dbnode/client/config.go

@@ -28,6 +28,7 @@ import (
 
 	"github.com/m3db/m3/src/dbnode/encoding"
 	"github.com/m3db/m3/src/dbnode/encoding/m3tsz"
+	"github.com/m3db/m3/src/dbnode/encoding/proto"
 	"github.com/m3db/m3/src/dbnode/environment"
 	"github.com/m3db/m3/src/dbnode/namespace"
 	"github.com/m3db/m3/src/dbnode/topology"
@@ -392,9 +393,11 @@ func (c Configuration) NewAdminClient(
 		encodingOpts = encoding.NewOptions()
 	}
 
-	v = v.SetReaderIteratorAllocate(func(r io.Reader, _ namespace.SchemaDescr) encoding.ReaderIterator {
-		intOptimized := m3tsz.DefaultIntOptimizationEnabled
-		return m3tsz.NewReaderIterator(r, intOptimized, encodingOpts)
+	v = v.SetReaderIteratorAllocate(func(r io.Reader, descr namespace.SchemaDescr) encoding.ReaderIterator {
+		if c.Proto != nil && c.Proto.Enabled {
+			return proto.NewIterator(r, descr, encodingOpts)
+		}
+		return m3tsz.NewReaderIterator(r, m3tsz.DefaultIntOptimizationEnabled, encodingOpts)
 	})
 
 	if c.Proto != nil && c.Proto.Enabled {