diff --git a/cmd/cgr-loader/cgr-loader.go b/cmd/cgr-loader/cgr-loader.go
index f21fe5d6d..8c978cd26 100644
--- a/cmd/cgr-loader/cgr-loader.go
+++ b/cmd/cgr-loader/cgr-loader.go
@@ -210,12 +210,21 @@ func main() {
 		return
 	}
 	if migrate != nil && *migrate != "" { // Run migrator
+		ratingDb, err := engine.ConfigureRatingStorage(*tpdb_type, *tpdb_host, *tpdb_port, *tpdb_name,
+			*tpdb_user, *tpdb_pass, *dbdata_encoding, cgrConfig.CacheConfig, *loadHistorySize)
+		if err != nil {
+			log.Fatal(err)
+		}
+		accountDb, err := engine.ConfigureAccountingStorage(*datadb_type, *datadb_host, *datadb_port, *datadb_name, *datadb_user, *datadb_pass, *dbdata_encoding, cgrConfig.CacheConfig, *loadHistorySize)
+		if err != nil {
+			log.Fatal(err)
+		}
 		storDB, err := engine.ConfigureStorStorage(*stor_db_type, *stor_db_host, *stor_db_port, *stor_db_name, *stor_db_user, *stor_db_pass, *dbdata_encoding,
 			cgrConfig.StorDBMaxOpenConns, cgrConfig.StorDBMaxIdleConns, cgrConfig.StorDBCDRSIndexes)
 		if err != nil {
 			log.Fatal(err)
 		}
-		if err := migrator.NewMigrator(storDB, *stor_db_type).Migrate(*migrate); err != nil {
+		if err := migrator.NewMigrator(ratingDb, accountDb, *datadb_type, storDB, *stor_db_type).Migrate(*migrate); err != nil {
 			log.Fatal(err)
 		}
 		log.Print("Done migrating!")
diff --git a/engine/storage_interface.go b/engine/storage_interface.go
index 4aab3a610..efa952488 100644
--- a/engine/storage_interface.go
+++ b/engine/storage_interface.go
@@ -42,6 +42,7 @@ type Storage interface {
 // Interface for storage providers.
 type RatingStorage interface {
 	Storage
+	Marshaler() Marshaler
 	HasData(string, string) (bool, error)
 	LoadRatingCache(dstIDs, rvDstIDs, rplIDs, rpfIDs, actIDs, aplIDs, aapIDs, atrgIDs, sgIDs, lcrIDs, dcIDs []string) error
 	GetRatingPlan(string, bool, string) (*RatingPlan, error)
@@ -83,6 +84,7 @@ type RatingStorage interface {
 
 type AccountingStorage interface {
 	Storage
+	Marshaler() Marshaler
 	LoadAccountingCache(alsIDs, rvAlsIDs, rlIDs []string) error
 	GetAccount(string) (*Account, error)
 	SetAccount(*Account) error
@@ -117,6 +119,7 @@ type AccountingStorage interface {
 // OnlineStorage contains methods to use for administering online data
 type DataDB interface {
 	Storage
+	Marshaler() Marshaler
 	HasData(string, string) (bool, error)
 	LoadRatingCache(dstIDs, rvDstIDs, rplIDs, rpfIDs, actIDs, aplIDs, aapIDs, atrgIDs, sgIDs, lcrIDs, dcIDs []string) error
 	GetRatingPlan(string, bool, string) (*RatingPlan, error)
diff --git a/engine/storage_map.go b/engine/storage_map.go
index 722572cf7..5a8cb3769 100644
--- a/engine/storage_map.go
+++ b/engine/storage_map.go
@@ -86,6 +86,10 @@ func (ms *MapStorage) Flush(ignore string) error {
 	return nil
 }
 
+func (ms *MapStorage) Marshaler() Marshaler {
+	return ms.ms
+}
+
 func (ms *MapStorage) SelectDatabase(dbName string) (err error) {
 	return
 }
diff --git a/engine/storage_mongo_datadb.go b/engine/storage_mongo_datadb.go
index fcbe00219..efc0567b6 100644
--- a/engine/storage_mongo_datadb.go
+++ b/engine/storage_mongo_datadb.go
@@ -322,6 +322,15 @@ func (ms *MongoStorage) Flush(ignore string) (err error) {
 	return dbSession.DB(ms.db).DropDatabase()
 }
 
+func (ms *MongoStorage) Marshaler() Marshaler {
+	return ms.ms
+}
+
+// CloneSession returns a clone of the existing session so we can perform queries from outside of engine package
+func (ms *MongoStorage) CloneSession() *mgo.Session {
+	return ms.session.Copy()
+}
+
 func (ms *MongoStorage) SelectDatabase(dbName string) (err error) {
 	ms.db = dbName
 	return
diff --git a/engine/storage_redis.go b/engine/storage_redis.go
index 2dd9188cc..1e956606d 100644
--- a/engine/storage_redis.go
+++ b/engine/storage_redis.go
@@ -109,6 +109,10 @@ func (rs *RedisStorage) Flush(ignore string) error {
 	return rs.Cmd("FLUSHDB").Err
 }
 
+func (rs *RedisStorage) Marshaler() Marshaler {
+	return rs.ms
+}
+
 func (rs *RedisStorage) SelectDatabase(dbName string) (err error) {
 	return rs.Cmd("SELECT", dbName).Err
 }
diff --git a/engine/storage_sql.go b/engine/storage_sql.go
index 2c4f86d1e..cf63150fd 100644
--- a/engine/storage_sql.go
+++ b/engine/storage_sql.go
@@ -61,7 +61,7 @@ func (self *SQLStorage) GetKeysForPrefix(prefix string) ([]string, error) {
 	return nil, utils.ErrNotImplemented
 }
 
-func (ms *SQLStorage) RebuildReverseForPrefix(prefix string) error {
+func (self *SQLStorage) RebuildReverseForPrefix(prefix string) error {
 	return utils.ErrNotImplemented
 }
 
diff --git a/migrator/accounts.go b/migrator/accounts.go
new file mode 100644
index 000000000..c4c6c6de1
--- /dev/null
+++ b/migrator/accounts.go
@@ -0,0 +1,97 @@
+/*
+Real-time Online/Offline Charging System (OCS) for Telecom & ISP environments
+Copyright (C) ITsysCOM GmbH
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>
+*/
+package migrator
+
+import (
+	"time"
+
+	"github.com/cgrates/cgrates/engine"
+	"github.com/cgrates/cgrates/utils"
+)
+
+func (m *Migrator) migrateAccounts() (err error) {
+	return
+}
+
+type v1Account struct {
+	Id             string
+	BalanceMap     map[string]v1BalanceChain
+	UnitCounters   []*v1UnitsCounter
+	ActionTriggers v1ActionTriggers
+	AllowNegative  bool
+	Disabled       bool
+}
+
+type v1BalanceChain []*v1Balance
+
+type v1Balance struct {
+	Uuid           string //system wide unique
+	Id             string // account wide unique
+	Value          float64
+	ExpirationDate time.Time
+	Weight         float64
+	DestinationIds string
+	RatingSubject  string
+	Category       string
+	SharedGroup    string
+	Timings        []*engine.RITiming
+	TimingIDs      string
+	Disabled       bool
+}
+
+func (b *v1Balance) IsDefault() bool {
+	return (b.DestinationIds == "" || b.DestinationIds == utils.ANY) &&
+		b.RatingSubject == "" &&
+		b.Category == "" &&
+		b.ExpirationDate.IsZero() &&
+		b.SharedGroup == "" &&
+		b.Weight == 0 &&
+		b.Disabled == false
+}
+
+type v1UnitsCounter struct {
+	Direction   string
+	BalanceType string
+	//	Units     float64
+	Balances v1BalanceChain // first balance is the general one (no destination)
+}
+
+type v1ActionTriggers []*v1ActionTrigger
+
+type v1ActionTrigger struct {
+	Id                    string
+	ThresholdType         string
+	ThresholdValue        float64
+	Recurrent             bool
+	MinSleep              time.Duration
+	BalanceId             string
+	BalanceType           string
+	BalanceDirection      string
+	BalanceDestinationIds string
+	BalanceWeight         float64
+	BalanceExpirationDate time.Time
+	BalanceTimingTags     string
+	BalanceRatingSubject  string
+	BalanceCategory       string
+	BalanceSharedGroup    string
+	BalanceDisabled       bool
+	Weight                float64
+	ActionsId             string
+	MinQueuedItems        int
+	Executed              bool
+}
diff --git a/migrator/costdetails.go b/migrator/costdetails.go
index d0b37d770..7d2755b61 100644
--- a/migrator/costdetails.go
+++ b/migrator/costdetails.go
@@ -18,11 +18,100 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>
 package migrator
 
 import (
+	"database/sql"
+	"encoding/json"
+	"fmt"
 	"time"
 
 	"github.com/cgrates/cgrates/engine"
+	"github.com/cgrates/cgrates/utils"
 )
 
+func (m *Migrator) migrateCostDetails() (err error) {
+	if m.storDB == nil {
+		return utils.NewCGRError(utils.Migrator,
+			utils.MandatoryIEMissingCaps,
+			utils.NoStorDBConnection,
+			"no connection to StorDB")
+	}
+	vrs, err := m.storDB.GetVersions(utils.COST_DETAILS)
+	if err != nil {
+		return utils.NewCGRError(utils.Migrator,
+			utils.ServerErrorCaps,
+			err.Error(),
+			fmt.Sprintf("error: <%s> when querying storDB for versions", err.Error()))
+	} else if len(vrs) == 0 {
+		return utils.NewCGRError(utils.Migrator,
+			utils.MandatoryIEMissingCaps,
+			utils.UndefinedVersion,
+			"version number is not defined for CostDetails model")
+	}
+	if vrs[utils.COST_DETAILS] != 1 { // Right now we only support migrating from version 1
+		return
+	}
+	var storSQL *sql.DB
+	switch m.storDBType {
+	case utils.MYSQL:
+		storSQL = m.storDB.(*engine.MySQLStorage).Db
+	case utils.POSTGRES:
+		storSQL = m.storDB.(*engine.PostgresStorage).Db
+	default:
+		return utils.NewCGRError(utils.Migrator,
+			utils.MandatoryIEMissingCaps,
+			utils.UnsupportedDB,
+			fmt.Sprintf("unsupported database type: <%s>", m.storDBType))
+	}
+	rows, err := storSQL.Query("SELECT id, tor, direction, tenant, category, account, subject, destination, cost, cost_details FROM cdrs WHERE run_id!= '*raw' and cost_details IS NOT NULL AND deleted_at IS NULL")
+	if err != nil {
+		return utils.NewCGRError(utils.Migrator,
+			utils.ServerErrorCaps,
+			err.Error(),
+			fmt.Sprintf("error: <%s> when querying storDB for cdrs", err.Error()))
+	}
+	defer rows.Close()
+	for cnt := 0; rows.Next(); cnt++ {
+		var id int64
+		var ccDirection, ccCategory, ccTenant, ccSubject, ccAccount, ccDestination, ccTor sql.NullString
+		var ccCost sql.NullFloat64
+		var tts []byte
+		if err := rows.Scan(&id, &ccTor, &ccDirection, &ccTenant, &ccCategory, &ccAccount, &ccSubject, &ccDestination, &ccCost, &tts); err != nil {
+			return utils.NewCGRError(utils.Migrator,
+				utils.ServerErrorCaps,
+				err.Error(),
+				fmt.Sprintf("error: <%s> when scanning at count: <%d>", err.Error(), cnt))
+		}
+		var v1tmsps v1TimeSpans
+		if err := json.Unmarshal(tts, &v1tmsps); err != nil {
+			utils.Logger.Warning(
+				fmt.Sprintf("<Migrator> Unmarshalling timespans at CDR with id: <%d>, error: <%s>", id, err.Error()))
+			continue
+		}
+		v1CC := &v1CallCost{Direction: ccDirection.String, Category: ccCategory.String, Tenant: ccTenant.String,
+			Subject: ccSubject.String, Account: ccAccount.String, Destination: ccDestination.String, TOR: ccTor.String,
+			Cost: ccCost.Float64, Timespans: v1tmsps}
+		cc, err := v1CC.AsCallCost()
+		if err != nil {
+			utils.Logger.Warning(
+				fmt.Sprintf("<Migrator> Error: <%s> when converting into CallCost CDR with id: <%d>", err.Error(), id))
+			continue
+		}
+		if _, err := storSQL.Exec(fmt.Sprintf("UPDATE cdrs SET cost_details='%s' WHERE id=%d", cc.AsJSON(), id)); err != nil {
+			utils.Logger.Warning(
+				fmt.Sprintf("<Migrator> Error: <%s> updating CDR with id <%d> into StorDB", err.Error(), id))
+			continue
+		}
+	}
+	// All done, update version wtih current one
+	vrs = engine.Versions{utils.COST_DETAILS: engine.CurrentStorDBVersions()[utils.COST_DETAILS]}
+	if err := m.storDB.SetVersions(vrs); err != nil {
+		return utils.NewCGRError(utils.Migrator,
+			utils.ServerErrorCaps,
+			err.Error(),
+			fmt.Sprintf("error: <%s> when updating CostDetails version into StorDB", err.Error()))
+	}
+	return
+}
+
 type v1CallCost struct {
 	Direction, Category, Tenant, Subject, Account, Destination, TOR string
 	Cost                                                            float64
diff --git a/migrator/migrator.go b/migrator/migrator.go
index fe4c7e242..2b9cc4bfe 100644
--- a/migrator/migrator.go
+++ b/migrator/migrator.go
@@ -18,23 +18,25 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>
 package migrator
 
 import (
-	"database/sql"
-	"encoding/json"
 	"fmt"
 
 	"github.com/cgrates/cgrates/engine"
 	"github.com/cgrates/cgrates/utils"
 )
 
-func NewMigrator(storDB engine.Storage, storDBType string) *Migrator {
-	return &Migrator{storDB: storDB, storDBType: storDBType}
+func NewMigrator(tpDB engine.RatingStorage, dataDB engine.AccountingStorage, dataDBType string, storDB engine.Storage, storDBType string) *Migrator {
+	return &Migrator{tpDB: tpDB, dataDB: dataDB, dataDBType: dataDBType, storDB: storDB, storDBType: storDBType}
 }
 
 type Migrator struct {
+	tpDB       engine.RatingStorage // ToDo: unify the databases when ready
+	dataDB     engine.AccountingStorage
+	dataDBType string
 	storDB     engine.Storage
 	storDBType string
 }
 
+// Migrate implements the tasks to migrate, used as a dispatcher to the individual methods
 func (m *Migrator) Migrate(taskID string) (err error) {
 	switch taskID {
 	default: // unsupported taskID
@@ -51,91 +53,8 @@ func (m *Migrator) Migrate(taskID string) (err error) {
 		}
 	case utils.MetaCostDetails:
 		err = m.migrateCostDetails()
-	}
-	return
-}
-
-func (m *Migrator) migrateCostDetails() (err error) {
-	if m.storDB == nil {
-		return utils.NewCGRError(utils.Migrator,
-			utils.MandatoryIEMissingCaps,
-			utils.NoStorDBConnection,
-			"no connection to StorDB")
-	}
-	vrs, err := m.storDB.GetVersions(utils.COST_DETAILS)
-	if err != nil {
-		return utils.NewCGRError(utils.Migrator,
-			utils.ServerErrorCaps,
-			err.Error(),
-			fmt.Sprintf("error: <%s> when querying storDB for versions", err.Error()))
-	} else if len(vrs) == 0 {
-		return utils.NewCGRError(utils.Migrator,
-			utils.MandatoryIEMissingCaps,
-			utils.UndefinedVersion,
-			"version number is not defined for CostDetails model")
-	}
-	if vrs[utils.COST_DETAILS] != 1 { // Right now we only support migrating from version 1
-		return
-	}
-	var storSQL *sql.DB
-	switch m.storDBType {
-	case utils.MYSQL:
-		storSQL = m.storDB.(*engine.MySQLStorage).Db
-	case utils.POSTGRES:
-		storSQL = m.storDB.(*engine.PostgresStorage).Db
-	default:
-		return utils.NewCGRError(utils.Migrator,
-			utils.MandatoryIEMissingCaps,
-			utils.UnsupportedDB,
-			fmt.Sprintf("unsupported database type: <%s>", m.storDBType))
-	}
-	rows, err := storSQL.Query("SELECT id, tor, direction, tenant, category, account, subject, destination, cost, cost_details FROM cdrs WHERE run_id!= '*raw' and cost_details IS NOT NULL AND deleted_at IS NULL")
-	if err != nil {
-		return utils.NewCGRError(utils.Migrator,
-			utils.ServerErrorCaps,
-			err.Error(),
-			fmt.Sprintf("error: <%s> when querying storDB for cdrs", err.Error()))
-	}
-	defer rows.Close()
-	for cnt := 0; rows.Next(); cnt++ {
-		var id int64
-		var ccDirection, ccCategory, ccTenant, ccSubject, ccAccount, ccDestination, ccTor sql.NullString
-		var ccCost sql.NullFloat64
-		var tts []byte
-		if err := rows.Scan(&id, &ccTor, &ccDirection, &ccTenant, &ccCategory, &ccAccount, &ccSubject, &ccDestination, &ccCost, &tts); err != nil {
-			return utils.NewCGRError(utils.Migrator,
-				utils.ServerErrorCaps,
-				err.Error(),
-				fmt.Sprintf("error: <%s> when scanning at count: <%d>", err.Error(), cnt))
-		}
-		var v1tmsps v1TimeSpans
-		if err := json.Unmarshal(tts, &v1tmsps); err != nil {
-			utils.Logger.Warning(
-				fmt.Sprintf("<Migrator> Unmarshalling timespans at CDR with id: <%d>, error: <%s>", id, err.Error()))
-			continue
-		}
-		v1CC := &v1CallCost{Direction: ccDirection.String, Category: ccCategory.String, Tenant: ccTenant.String,
-			Subject: ccSubject.String, Account: ccAccount.String, Destination: ccDestination.String, TOR: ccTor.String,
-			Cost: ccCost.Float64, Timespans: v1tmsps}
-		cc, err := v1CC.AsCallCost()
-		if err != nil {
-			utils.Logger.Warning(
-				fmt.Sprintf("<Migrator> Error: <%s> when converting into CallCost CDR with id: <%d>", err.Error(), id))
-			continue
-		}
-		if _, err := storSQL.Exec(fmt.Sprintf("UPDATE cdrs SET cost_details='%s' WHERE id=%d", cc.AsJSON(), id)); err != nil {
-			utils.Logger.Warning(
-				fmt.Sprintf("<Migrator> Error: <%s> updating CDR with id <%d> into StorDB", err.Error(), id))
-			continue
-		}
-	}
-	// All done, update version wtih current one
-	vrs = engine.Versions{utils.COST_DETAILS: engine.CurrentStorDBVersions()[utils.COST_DETAILS]}
-	if err := m.storDB.SetVersions(vrs); err != nil {
-		return utils.NewCGRError(utils.Migrator,
-			utils.ServerErrorCaps,
-			err.Error(),
-			fmt.Sprintf("error: <%s> when updating CostDetails version into StorDB", err.Error()))
+	case utils.MetaAccounts:
+		err = m.migrateAccounts()
 	}
 	return
 }
diff --git a/sessionmanager/smgeneric.go b/sessionmanager/smgeneric.go
index 2e05f523f..0bc255a3e 100644
--- a/sessionmanager/smgeneric.go
+++ b/sessionmanager/smgeneric.go
@@ -473,9 +473,6 @@ func (smg *SMGeneric) replicateSessionsWithID(cgrID string, passiveSessions bool
 	ssMux.RLock()
 	ss := ssMp[cgrID]
 	ssMux.RUnlock()
-	if len(ss) == 0 {
-		return
-	}
 	var wg sync.WaitGroup
 	for _, rplConn := range smgReplConns {
 		if rplConn.Synchronous {
diff --git a/utils/consts.go b/utils/consts.go
index 90a98fabb..037110ce9 100644
--- a/utils/consts.go
+++ b/utils/consts.go
@@ -347,6 +347,7 @@ const (
 	SchedulerNotRunningCaps      = "SCHEDULLER_NOT_RUNNING"
 	MetaScheduler                = "*scheduler"
 	MetaCostDetails              = "*cost_details"
+	MetaAccounts                 = "*accounts"
 	Migrator                     = "migrator"
 	UnsupportedMigrationTask     = "unsupported migration task"
 	NoStorDBConnection           = "not connected to StorDB"