diff --git a/consumer.go b/consumer.go
index 9a69e30..67557a0 100644
--- a/consumer.go
+++ b/consumer.go
@@ -2,6 +2,8 @@
 package main
 
 import (
+	"crypto/md5"
+	"crypto/sha1"
 	"crypto/sha256"
 	"encoding/hex"
 	"fmt"
@@ -19,7 +21,7 @@ type consumed struct {
 	logins []string
 }
 
-func hash(val []byte) string {
+func hash256(val []byte) string {
 
 	h := sha256.New()
 	h.Write(val)
@@ -27,6 +29,22 @@ func hash(val []byte) string {
 	return hex.EncodeToString(h.Sum(nil))
 }
 
+func hash160(val []byte) string {
+
+	h := sha1.New()
+	h.Write(val)
+
+	return hex.EncodeToString(h.Sum(nil))
+}
+
+func hash128(val []byte) string {
+
+	h := md5.New()
+	h.Write(val)
+
+	return hex.EncodeToString(h.Sum(nil))
+}
+
 func consumer() {
 
 	for {
@@ -46,7 +64,7 @@ func consumer() {
 		bulk.Unordered()
 
 		for p := range prod {
-			mlID := hash([]byte(fmt.Sprintf("%s%s", prod[p].user, start.Format("20060102T15"))))
+			mlID := hash128([]byte(fmt.Sprintf("%s%s", prod[p].user, start.Format("20060102T15"))))
 			mquota := MongoQuota{
 				ID:       mlID,
 				User:     prod[p].user,
diff --git a/main.go b/main.go
index 3ad1d7b..b128ed5 100644
--- a/main.go
+++ b/main.go
@@ -12,7 +12,7 @@ import (
 )
 
 const (
-	_Version  = "v2.2.2"
+	_Version  = "v2.3.0"
 	_Producer = 0
 	_Consumer = 1
 )
diff --git a/options.go b/options.go
index cd65620..12cd7b1 100644
--- a/options.go
+++ b/options.go
@@ -70,6 +70,6 @@ func init() {
 	flag.DurationVar(&opts.Timeout, "T", 0, "Running timeout")
 	flag.BoolVar(&opts.Debug, "D", false, "Debug")
 	flag.BoolVar(&opts.Test, "DD", false, "Test")
-	flag.IntVar(&opts.MaxBulk, "M", 500, "Max Mongodb bulk")
+	flag.IntVar(&opts.MaxBulk, "M", 300, "Max Mongodb bulk")
 	flag.IntVar(&opts.Queue, "q", 2, "parallel consumer")
 }