diff --git a/config/components/database/client.go b/config/components/database/client.go
index c0040e8..801849b 100644
--- a/config/components/database/client.go
+++ b/config/components/database/client.go
@@ -29,8 +29,9 @@ package database
 import (
 	"context"
 
+	"github.com/nabbar/golib/database/gorm"
+
 	cfgtps "github.com/nabbar/golib/config/types"
-	libdbs "github.com/nabbar/golib/database"
 	liberr "github.com/nabbar/golib/errors"
 	libver "github.com/nabbar/golib/version"
 	libvpr "github.com/nabbar/golib/viper"
@@ -159,8 +160,8 @@ func (o *componentDatabase) _runCli() liberr.Error {
 	var (
 		err liberr.Error
 		prt = ErrorComponentReload
-		dbo libdbs.Database
-		cfg *libdbs.Config
+		dbo gorm.Database
+		cfg *gorm.Config
 	)
 
 	if !o.IsStarted() {
@@ -171,7 +172,7 @@ func (o *componentDatabase) _runCli() liberr.Error {
 		return prt.Error(err)
 	}
 
-	if dbo, err = libdbs.New(cfg); err != nil {
+	if dbo, err = gorm.New(cfg); err != nil {
 		return prt.Error(err)
 	}
 
diff --git a/config/components/database/config.go b/config/components/database/config.go
index e21c0eb..8927141 100644
--- a/config/components/database/config.go
+++ b/config/components/database/config.go
@@ -29,7 +29,8 @@ package database
 import (
 	"time"
 
-	libdbs "github.com/nabbar/golib/database"
+	"github.com/nabbar/golib/database/gorm"
+
 	liberr "github.com/nabbar/golib/errors"
 	spfcbr "github.com/spf13/cobra"
 	spfvpr "github.com/spf13/viper"
@@ -107,10 +108,10 @@ func (o *componentDatabase) RegisterFlag(Command *spfcbr.Command) error {
 	return nil
 }
 
-func (o *componentDatabase) _getConfig() (*libdbs.Config, liberr.Error) {
+func (o *componentDatabase) _getConfig() (*gorm.Config, liberr.Error) {
 	var (
 		key string
-		cfg libdbs.Config
+		cfg gorm.Config
 		vpr *spfvpr.Viper
 		err liberr.Error
 	)
@@ -129,7 +130,7 @@ func (o *componentDatabase) _getConfig() (*libdbs.Config, liberr.Error) {
 	cfg.RegisterContext(o.x.GetContext)
 
 	if val := vpr.GetString(key + ".driver"); val != "" {
-		cfg.Driver = libdbs.DriverFromString(val)
+		cfg.Driver = gorm.DriverFromString(val)
 	}
 	if val := vpr.GetString(key + ".name"); val != "" {
 		cfg.Name = val
diff --git a/config/components/database/interface.go b/config/components/database/interface.go
index b54f2c9..10b29fc 100644
--- a/config/components/database/interface.go
+++ b/config/components/database/interface.go
@@ -30,10 +30,11 @@ import (
 	"sync"
 	"time"
 
+	libdbs "github.com/nabbar/golib/database/gorm"
+
 	libcfg "github.com/nabbar/golib/config"
 	cfgtps "github.com/nabbar/golib/config/types"
 	libctx "github.com/nabbar/golib/context"
-	libdbs "github.com/nabbar/golib/database"
 )
 
 type ComponentDatabase interface {
diff --git a/config/components/database/model.go b/config/components/database/model.go
index 0c9b2c7..816b564 100644
--- a/config/components/database/model.go
+++ b/config/components/database/model.go
@@ -30,8 +30,9 @@ import (
 	"sync"
 	"time"
 
+	libdbs "github.com/nabbar/golib/database/gorm"
+
 	libctx "github.com/nabbar/golib/context"
-	libdbs "github.com/nabbar/golib/database"
 	montps "github.com/nabbar/golib/monitor/types"
 )
 
diff --git a/config/components/database/monitor.go b/config/components/database/monitor.go
index 7f21330..9ff786b 100644
--- a/config/components/database/monitor.go
+++ b/config/components/database/monitor.go
@@ -27,7 +27,7 @@
 package database
 
 import (
-	libdbs "github.com/nabbar/golib/database"
+	libdbs "github.com/nabbar/golib/database/gorm"
 	libmon "github.com/nabbar/golib/monitor"
 	montps "github.com/nabbar/golib/monitor/types"
 	libver "github.com/nabbar/golib/version"
diff --git a/database/config.go b/database/gorm/config.go
similarity index 99%
rename from database/config.go
rename to database/gorm/config.go
index 4efac49..9a68152 100644
--- a/database/config.go
+++ b/database/gorm/config.go
@@ -24,7 +24,7 @@
  *
  */
 
-package database
+package gorm
 
 import (
 	"database/sql"
diff --git a/database/driver.go b/database/gorm/driver.go
similarity index 99%
rename from database/driver.go
rename to database/gorm/driver.go
index 0fa601a..56c6206 100644
--- a/database/driver.go
+++ b/database/gorm/driver.go
@@ -27,7 +27,7 @@
  *
  */
 
-package database
+package gorm
 
 import (
 	"strings"
diff --git a/database/driver_darwin.go b/database/gorm/driver_darwin.go
similarity index 99%
rename from database/driver_darwin.go
rename to database/gorm/driver_darwin.go
index a5cd7cb..1b37a62 100644
--- a/database/driver_darwin.go
+++ b/database/gorm/driver_darwin.go
@@ -27,7 +27,7 @@
  *
  */
 
-package database
+package gorm
 
 import (
 	"strings"
diff --git a/database/errors.go b/database/gorm/errors.go
similarity index 77%
rename from database/errors.go
rename to database/gorm/errors.go
index b3b5e33..d2231ee 100644
--- a/database/errors.go
+++ b/database/gorm/errors.go
@@ -24,12 +24,18 @@
  *
  */
 
-package database
+package gorm
 
-import "github.com/nabbar/golib/errors"
+import (
+	"fmt"
+
+	liberr "github.com/nabbar/golib/errors"
+)
+
+const pkgName = "golib/database/gorm"
 
 const (
-	ErrorParamsEmpty errors.CodeError = iota + errors.MinPkgDatabase
+	ErrorParamEmpty liberr.CodeError = iota + liberr.MinPkgDatabaseGorm
 	ErrorDatabaseOpen
 	ErrorDatabaseOpenPool
 	ErrorValidatorError
@@ -38,22 +44,18 @@ const (
 	ErrorDatabasePing
 )
 
-var isCodeError = false
-
-func IsCodeError() bool {
-	return isCodeError
-}
-
 func init() {
-	isCodeError = errors.ExistInMapMessage(ErrorParamsEmpty)
-	errors.RegisterIdFctMessage(ErrorParamsEmpty, getMessage)
+	if liberr.ExistInMapMessage(ErrorParamEmpty) {
+		panic(fmt.Errorf("error code collision with package %s", pkgName))
+	}
+	liberr.RegisterIdFctMessage(ErrorParamEmpty, getMessage)
 }
 
-func getMessage(code errors.CodeError) (message string) {
+func getMessage(code liberr.CodeError) (message string) {
 	switch code {
-	case errors.UNK_ERROR:
-		return ""
-	case ErrorParamsEmpty:
+	case liberr.UnknownError:
+		return liberr.NullMessage
+	case ErrorParamEmpty:
 		return "given parameters is empty"
 	case ErrorDatabaseOpen:
 		return "database : start connection to dsn"
@@ -69,5 +71,5 @@ func getMessage(code errors.CodeError) (message string) {
 		return "database : ping error"
 	}
 
-	return ""
+	return liberr.NullMessage
 }
diff --git a/database/interface.go b/database/gorm/interface.go
similarity index 99%
rename from database/interface.go
rename to database/gorm/interface.go
index 2fde62f..e6a45d5 100644
--- a/database/interface.go
+++ b/database/gorm/interface.go
@@ -24,7 +24,7 @@
  *
  */
 
-package database
+package gorm
 
 import (
 	"context"
diff --git a/database/model.go b/database/gorm/model.go
similarity index 99%
rename from database/model.go
rename to database/gorm/model.go
index dea68fe..7a49252 100644
--- a/database/model.go
+++ b/database/gorm/model.go
@@ -24,7 +24,7 @@
  *
  */
 
-package database
+package gorm
 
 import (
 	"context"
diff --git a/database/monitor.go b/database/gorm/monitor.go
similarity index 99%
rename from database/monitor.go
rename to database/gorm/monitor.go
index a193699..497de76 100644
--- a/database/monitor.go
+++ b/database/gorm/monitor.go
@@ -24,7 +24,7 @@
  *
  */
 
-package database
+package gorm
 
 import (
 	"context"
diff --git a/database/kvdriver/errors.go b/database/kvdriver/errors.go
new file mode 100644
index 0000000..3fc963c
--- /dev/null
+++ b/database/kvdriver/errors.go
@@ -0,0 +1,72 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2022 Nicolas JUHEL
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ *
+ */
+
+package kvdriver
+
+import (
+	"fmt"
+
+	liberr "github.com/nabbar/golib/errors"
+)
+
+const pkgName = "golib/database/kvdriver"
+
+const (
+	ErrorParamEmpty liberr.CodeError = iota + liberr.MinPkgDatabaseKVDrv
+	ErrorBadInstance
+	ErrorGetFunction
+	ErrorSetFunction
+	ErrorListFunction
+	ErrorFunctionParams
+)
+
+func init() {
+	if liberr.ExistInMapMessage(ErrorParamEmpty) {
+		panic(fmt.Errorf("error code collision with package %s", pkgName))
+	}
+	liberr.RegisterIdFctMessage(ErrorParamEmpty, getMessage)
+}
+
+func getMessage(code liberr.CodeError) (message string) {
+	switch code {
+	case liberr.UnknownError:
+		return liberr.NullMessage
+	case ErrorParamEmpty:
+		return "given parameters is empty"
+	case ErrorBadInstance:
+		return "bad instance of " + pkgName
+	case ErrorGetFunction:
+		return "missing get function of " + pkgName
+	case ErrorSetFunction:
+		return "missing set function of " + pkgName
+	case ErrorListFunction:
+		return "missing list function of " + pkgName
+	case ErrorFunctionParams:
+		return "missing function params"
+	}
+
+	return liberr.NullMessage
+}
diff --git a/database/kvdriver/interface.go b/database/kvdriver/interface.go
new file mode 100644
index 0000000..703a41b
--- /dev/null
+++ b/database/kvdriver/interface.go
@@ -0,0 +1,50 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2023 Nicolas JUHEL
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ *
+ */
+
+package kvdriver
+
+type FctWalk[K comparable, M any] func(key K, model M) bool
+
+type KVDriver[K comparable, M any] interface {
+	Get(key K, model *M) error
+	Set(key K, model M) error
+	List() ([]K, error)
+	Walk(fct FctWalk[K, M]) error
+}
+
+type FuncGet[K comparable, M any] func(key K) (M, error)
+type FuncSet[K comparable, M any] func(key K, model M) error
+type FuncList[K comparable, M any] func() ([]K, error)
+type FuncWalk[K comparable, M any] func(fct FctWalk[K, M]) error
+
+type Driver[K comparable, M any] struct {
+	KVDriver[K, M]
+
+	FctGet  FuncGet[K, M]
+	FctSet  FuncSet[K, M]
+	FctList FuncList[K, M]
+	FctWalk FuncWalk[K, M] // optional
+}
diff --git a/database/kvdriver/model.go b/database/kvdriver/model.go
new file mode 100644
index 0000000..af5918f
--- /dev/null
+++ b/database/kvdriver/model.go
@@ -0,0 +1,91 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2023 Nicolas JUHEL
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ *
+ */
+
+package kvdriver
+
+func (o *Driver[K, M]) Get(key K, model *M) error {
+	if o == nil {
+		return ErrorBadInstance.Error(nil)
+	} else if o.FctGet == nil {
+		return ErrorGetFunction.Error(nil)
+	} else {
+		m, e := o.FctGet(key)
+		*model = m
+		return e
+	}
+}
+
+func (o *Driver[K, M]) Set(key K, model M) error {
+	if o == nil {
+		return ErrorBadInstance.Error(nil)
+	} else if o.FctSet == nil {
+		return ErrorSetFunction.Error(nil)
+	} else {
+		return o.FctSet(key, model)
+	}
+}
+
+func (o *Driver[K, M]) List() ([]K, error) {
+	if o == nil {
+		return nil, ErrorBadInstance.Error(nil)
+	} else if o.FctList == nil {
+		return nil, ErrorListFunction.Error(nil)
+	} else {
+		return o.FctList()
+	}
+}
+
+func (o *Driver[K, M]) Walk(fct FctWalk[K, M]) error {
+	if o == nil {
+		return ErrorBadInstance.Error(nil)
+	} else if fct == nil {
+		return ErrorFunctionParams.Error(nil)
+	} else if o.FctWalk == nil {
+		return o.fakeWalk(fct)
+	} else {
+		return o.FctWalk(fct)
+	}
+}
+
+func (o *Driver[K, M]) fakeWalk(fct FctWalk[K, M]) error {
+	if l, e := o.List(); e != nil {
+		return e
+	} else {
+		for _, k := range l {
+			var m = *(new(M))
+
+			if er := o.Get(k, &m); er != nil {
+				return er
+			}
+
+			if !fct(k, m) {
+				return nil
+			}
+		}
+	}
+
+	return nil
+}
diff --git a/database/kvitem/errors.go b/database/kvitem/errors.go
new file mode 100644
index 0000000..686ef92
--- /dev/null
+++ b/database/kvitem/errors.go
@@ -0,0 +1,63 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2022 Nicolas JUHEL
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ *
+ */
+
+package kvitem
+
+import (
+	"fmt"
+
+	liberr "github.com/nabbar/golib/errors"
+)
+
+const pkgName = "golib/database/kvitem"
+
+const (
+	ErrorParamEmpty liberr.CodeError = iota + liberr.MinPkgDatabaseKVItm
+	ErrorLoadFunction
+	ErrorStoreFunction
+)
+
+func init() {
+	if liberr.ExistInMapMessage(ErrorParamEmpty) {
+		panic(fmt.Errorf("error code collision with package %s", pkgName))
+	}
+	liberr.RegisterIdFctMessage(ErrorParamEmpty, getMessage)
+}
+
+func getMessage(code liberr.CodeError) (message string) {
+	switch code {
+	case liberr.UnknownError:
+		return liberr.NullMessage
+	case ErrorParamEmpty:
+		return "given parameters is empty"
+	case ErrorLoadFunction:
+		return "missing load function of " + pkgName
+	case ErrorStoreFunction:
+		return "missing store function of " + pkgName
+	}
+
+	return liberr.NullMessage
+}
diff --git a/database/kvitem/interface.go b/database/kvitem/interface.go
new file mode 100644
index 0000000..1dec9c3
--- /dev/null
+++ b/database/kvitem/interface.go
@@ -0,0 +1,65 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2023 Nicolas JUHEL
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ *
+ */
+
+package kvitem
+
+import "sync/atomic"
+
+type FuncLoad[K comparable, M any] func(key K, model *M) error
+type FuncStore[K comparable, M any] func(key K, model M) error
+
+type KVItem[K comparable, M any] interface {
+	Set(model M)
+	Get() M
+
+	Load() error
+	Store(force bool) error
+	Clean()
+
+	HasChange() bool
+
+	RegisterFctLoad(fct FuncLoad[K, M])
+	RegisterFctStore(fct FuncStore[K, M])
+}
+
+func New[K comparable, M any](key K) KVItem[K, M] {
+	var (
+		ml = new(atomic.Value)
+		mw = new(atomic.Value)
+	)
+
+	ml.Store(nil)
+	mw.Store(nil)
+
+	return &itm[K, M]{
+		k:  key,
+		ml: ml,
+		ms: mw,
+		fl: nil,
+		fs: nil,
+	}
+
+}
diff --git a/database/kvitem/model.go b/database/kvitem/model.go
new file mode 100644
index 0000000..4a8b3f9
--- /dev/null
+++ b/database/kvitem/model.go
@@ -0,0 +1,203 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2023 Nicolas JUHEL
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ *
+ */
+
+package kvitem
+
+import (
+	"reflect"
+	"sync/atomic"
+)
+
+type itm[K comparable, M any] struct {
+	k K // key
+
+	ml *atomic.Value // model read
+	ms *atomic.Value // model write
+
+	fl *atomic.Value
+	fs *atomic.Value
+}
+
+func (o *itm[K, M]) RegisterFctLoad(fct FuncLoad[K, M]) {
+	o.fl.Store(fct)
+}
+
+func (o *itm[K, M]) getFctLoad() FuncLoad[K, M] {
+	if o == nil {
+		return nil
+	}
+
+	i := o.fs.Load()
+	if i == nil {
+		return nil
+	} else if f, k := i.(FuncLoad[K, M]); !k {
+		return nil
+	} else {
+		return f
+	}
+}
+
+func (o *itm[K, M]) RegisterFctStore(fct FuncStore[K, M]) {
+	o.fs.Store(fct)
+}
+
+func (o *itm[K, M]) getFctStore() FuncStore[K, M] {
+	if o == nil {
+		return nil
+	}
+
+	i := o.fs.Load()
+	if i == nil {
+		return nil
+	} else if f, k := i.(FuncStore[K, M]); !k {
+		return nil
+	} else {
+		return f
+	}
+}
+
+func (o *itm[K, M]) Set(model M) {
+	if o == nil {
+		return
+	}
+
+	m := o.ml.Load()
+
+	// model not loaded, so store new model
+	if m == nil {
+		o.ms.Store(model)
+		// model loaded and new model given not same, so store new model
+	} else if !reflect.DeepEqual(m.(M), model) {
+		o.ms.Store(model)
+		// model loaded and given model are same, so don't store new model
+	} else {
+		o.ms.Store(nil)
+	}
+}
+
+func (o *itm[K, M]) Get() M {
+	if o == nil {
+		return *(new(M))
+	}
+
+	// update exist so latest fresh value
+	m := o.ms.Load()
+	if m != nil {
+		if v, k := m.(M); k {
+			return v
+		}
+	}
+
+	// load model exist so return last model load
+	m = o.ml.Load()
+	if m != nil {
+		if v, k := m.(M); k {
+			return v
+		}
+	}
+
+	// nothing load, so return new instance
+	return *(new(M))
+}
+
+func (o *itm[K, M]) Load() error {
+	var fct FuncLoad[K, M]
+
+	if fct = o.getFctLoad(); fct == nil {
+		return ErrorLoadFunction.Error(nil)
+	}
+
+	m := *(new(M))
+	e := fct(o.k, &m)
+
+	if e == nil {
+		o.ml.Store(m)
+	}
+
+	return e
+}
+
+func (o *itm[K, M]) Store(force bool) error {
+	var fct FuncStore[K, M]
+
+	if fct = o.getFctStore(); fct == nil {
+		return ErrorStoreFunction.Error(nil)
+	}
+
+	m := o.ms.Load()
+	if m != nil {
+		return fct(o.k, m.(M))
+	} else if !force {
+		return nil
+	}
+
+	// no update, but force store, so use load model
+	m = o.ml.Load()
+	if m != nil {
+		return fct(o.k, m.(M))
+	}
+
+	// no update and no load, but force store, so use new instance of model
+	m = *(new(M))
+	return fct(o.k, m.(M))
+}
+
+func (o *itm[K, M]) Clean() {
+	o.ml.Store(nil)
+	o.ms.Store(nil)
+}
+
+func (o *itm[K, M]) HasChange() bool {
+	r := o.ml.Load()
+	w := o.ms.Load()
+
+	if r == nil && w == nil {
+		// not loaded and not store, so no change
+		return false
+	} else if r == nil {
+		// not loaded but store is set, so has been updated
+		return true
+	} else if w == nil {
+		// loaded and not store, so no change
+		return false
+	}
+
+	mr, kr := r.(M)
+	mw, kw := w.(M)
+
+	if !kr && !kw {
+		// no valid model, so no change
+		return false
+	} else if !kr {
+		// not valid model for load, but valid for store, so has been updated
+		return true
+	} else if !kw {
+		// valid model for load, but not valid for store, so like no change
+		return false
+	}
+
+	return !reflect.DeepEqual(mr, mw)
+}
diff --git a/database/kvmap/errors.go b/database/kvmap/errors.go
new file mode 100644
index 0000000..f8dd084
--- /dev/null
+++ b/database/kvmap/errors.go
@@ -0,0 +1,72 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2022 Nicolas JUHEL
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ *
+ */
+
+package kvmap
+
+import (
+	"fmt"
+
+	liberr "github.com/nabbar/golib/errors"
+)
+
+const pkgName = "golib/database/kvmap"
+
+const (
+	ErrorParamEmpty liberr.CodeError = iota + liberr.MinPkgDatabaseKVMap
+	ErrorBadInstance
+	ErrorGetFunction
+	ErrorSetFunction
+	ErrorListFunction
+	ErrorFunctionParams
+)
+
+func init() {
+	if liberr.ExistInMapMessage(ErrorParamEmpty) {
+		panic(fmt.Errorf("error code collision with package %s", pkgName))
+	}
+	liberr.RegisterIdFctMessage(ErrorParamEmpty, getMessage)
+}
+
+func getMessage(code liberr.CodeError) (message string) {
+	switch code {
+	case liberr.UnknownError:
+		return liberr.NullMessage
+	case ErrorParamEmpty:
+		return "given parameters is empty"
+	case ErrorBadInstance:
+		return "bad instance of " + pkgName
+	case ErrorGetFunction:
+		return "missing get function of " + pkgName
+	case ErrorSetFunction:
+		return "missing set function of " + pkgName
+	case ErrorListFunction:
+		return "missing list function of " + pkgName
+	case ErrorFunctionParams:
+		return "missing function params"
+	}
+
+	return liberr.NullMessage
+}
diff --git a/database/kvmap/interface.go b/database/kvmap/interface.go
new file mode 100644
index 0000000..f26b3f0
--- /dev/null
+++ b/database/kvmap/interface.go
@@ -0,0 +1,43 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2023 Nicolas JUHEL
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ *
+ */
+
+package kvmap
+
+import (
+	libkvd "github.com/nabbar/golib/database/kvdriver"
+)
+
+type FuncGet[K comparable, MK comparable] func(key K) (map[MK]any, error)
+type FuncSet[K comparable, MK comparable] func(key K, model map[MK]any) error
+type FuncList[K comparable, MK comparable] func() ([]K, error)
+
+type Driver[K comparable, MK comparable, M any] struct {
+	libkvd.KVDriver[K, M]
+
+	FctGet  FuncGet[K, MK]
+	FctSet  FuncSet[K, MK]
+	FctList FuncList[K, MK]
+}
diff --git a/database/kvmap/model.go b/database/kvmap/model.go
new file mode 100644
index 0000000..e9dcf04
--- /dev/null
+++ b/database/kvmap/model.go
@@ -0,0 +1,109 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2023 Nicolas JUHEL
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ *
+ */
+
+package kvmap
+
+import (
+	"encoding/json"
+
+	libkvd "github.com/nabbar/golib/database/kvdriver"
+)
+
+func (o *Driver[K, MK, M]) serialize(model *M, modelMap *map[MK]any) error {
+	if p, e := json.Marshal(model); e != nil {
+		return e
+	} else {
+		return json.Unmarshal(p, modelMap)
+	}
+}
+
+func (o *Driver[K, MK, M]) unSerialize(modelMap *map[MK]any, model *M) error {
+	if p, e := json.Marshal(modelMap); e != nil {
+		return e
+	} else {
+		return json.Unmarshal(p, model)
+	}
+}
+
+func (o *Driver[K, MK, M]) Get(key K, model *M) error {
+	if o == nil {
+		return ErrorBadInstance.Error(nil)
+	} else if o.FctGet == nil {
+		return ErrorGetFunction.Error(nil)
+	} else if m, e := o.FctGet(key); e != nil {
+		return e
+	} else {
+		return o.unSerialize(&m, model)
+	}
+}
+
+func (o *Driver[K, MK, M]) Set(key K, model M) error {
+	var m = make(map[MK]any)
+
+	if o == nil {
+		return ErrorBadInstance.Error(nil)
+	} else if o.FctSet == nil {
+		return ErrorSetFunction.Error(nil)
+	} else if e := o.serialize(&model, &m); e != nil {
+		return e
+	} else {
+		return o.FctSet(key, m)
+	}
+}
+
+func (o *Driver[K, MK, M]) List() ([]K, error) {
+	if o == nil {
+		return nil, ErrorBadInstance.Error(nil)
+	} else if o.FctList == nil {
+		return nil, ErrorListFunction.Error(nil)
+	} else {
+		return o.FctList()
+	}
+}
+
+func (o *Driver[K, MK, M]) Walk(fct libkvd.FctWalk[K, M]) error {
+	if o == nil {
+		return ErrorBadInstance.Error(nil)
+	} else if fct == nil {
+		return ErrorFunctionParams.Error(nil)
+	} else if l, e := o.List(); e != nil {
+		return e
+	} else {
+		for _, k := range l {
+			var m = *(new(M))
+
+			if er := o.Get(k, &m); er != nil {
+				return er
+			}
+
+			if !fct(k, m) {
+				return nil
+			}
+		}
+	}
+
+	return nil
+}
diff --git a/database/kvtable/errors.go b/database/kvtable/errors.go
new file mode 100644
index 0000000..07b10eb
--- /dev/null
+++ b/database/kvtable/errors.go
@@ -0,0 +1,60 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2022 Nicolas JUHEL
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ *
+ */
+
+package kvtable
+
+import (
+	"fmt"
+
+	liberr "github.com/nabbar/golib/errors"
+)
+
+const pkgName = "golib/database/kvtable"
+
+const (
+	ErrorParamEmpty liberr.CodeError = iota + liberr.MinPkgDatabaseKVTbl
+	ErrorBadDriver
+)
+
+func init() {
+	if liberr.ExistInMapMessage(ErrorParamEmpty) {
+		panic(fmt.Errorf("error code collision with package %s", pkgName))
+	}
+	liberr.RegisterIdFctMessage(ErrorParamEmpty, getMessage)
+}
+
+func getMessage(code liberr.CodeError) (message string) {
+	switch code {
+	case liberr.UnknownError:
+		return liberr.NullMessage
+	case ErrorParamEmpty:
+		return "given parameters is empty"
+	case ErrorBadDriver:
+		return "bad driver of " + pkgName
+	}
+
+	return liberr.NullMessage
+}
diff --git a/database/kvtable/interface.go b/database/kvtable/interface.go
new file mode 100644
index 0000000..6fc6a46
--- /dev/null
+++ b/database/kvtable/interface.go
@@ -0,0 +1,51 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2023 Nicolas JUHEL
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ *
+ */
+
+package kvtable
+
+import (
+	"sync/atomic"
+
+	libkvd "github.com/nabbar/golib/database/kvdriver"
+	libkvi "github.com/nabbar/golib/database/kvitem"
+)
+
+type FuncWalk[K comparable, M any] func(kv libkvi.KVItem[K, M]) bool
+
+type KVTable[K comparable, M any] interface {
+	Get(key K) (libkvi.KVItem[K, M], error)
+	List() ([]libkvi.KVItem[K, M], error)
+	Walk(fct FuncWalk[K, M]) error
+}
+
+func New[K comparable, M any](drv libkvd.KVDriver[K, M]) KVTable[K, M] {
+	d := new(atomic.Value)
+	d.Store(drv)
+
+	return &tbl[K, M]{
+		d: d,
+	}
+}
diff --git a/database/kvtable/model.go b/database/kvtable/model.go
new file mode 100644
index 0000000..3a6db8f
--- /dev/null
+++ b/database/kvtable/model.go
@@ -0,0 +1,107 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2023 Nicolas JUHEL
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ *
+ */
+
+package kvtable
+
+import (
+	"sync/atomic"
+
+	libkvd "github.com/nabbar/golib/database/kvdriver"
+	libkvs "github.com/nabbar/golib/database/kvitem"
+)
+
+type tbl[K comparable, M any] struct {
+	d *atomic.Value
+}
+
+func (o *tbl[K, M]) getDriver() libkvd.KVDriver[K, M] {
+	if o == nil {
+		return nil
+	}
+
+	i := o.d.Load()
+	if i == nil {
+		return nil
+	} else if d, k := i.(libkvd.KVDriver[K, M]); !k {
+		return nil
+	} else {
+		return d
+	}
+}
+
+func (o *tbl[K, M]) Get(key K) (libkvs.KVItem[K, M], error) {
+	var kvs = libkvs.New[K, M](key)
+
+	if drv := o.getDriver(); drv == nil {
+		return nil, ErrorBadDriver.Error(nil)
+	} else {
+		kvs.RegisterFctLoad(drv.Get)
+		kvs.RegisterFctStore(drv.Set)
+	}
+
+	return kvs, kvs.Load()
+}
+
+func (o *tbl[K, M]) Walk(fct FuncWalk[K, M]) error {
+	if drv := o.getDriver(); drv == nil {
+		return ErrorBadDriver.Error(nil)
+	} else {
+		return drv.Walk(func(key K, model M) bool {
+			var kvs = libkvs.New[K, M](key)
+
+			kvs.RegisterFctStore(drv.Set)
+			kvs.RegisterFctLoad(func(k K, m *M) error {
+				*m = model
+				return nil
+			})
+			_ = kvs.Load()
+			kvs.RegisterFctLoad(drv.Get)
+
+			return fct(kvs)
+		})
+	}
+}
+
+func (o *tbl[K, M]) List() ([]libkvs.KVItem[K, M], error) {
+	var res = make([]libkvs.KVItem[K, M], 0)
+
+	if drv := o.getDriver(); drv == nil {
+		return nil, ErrorBadDriver.Error(nil)
+	} else if l, e := drv.List(); e != nil {
+		return nil, e
+	} else {
+		for _, k := range l {
+			var kvs = libkvs.New[K, M](k)
+
+			kvs.RegisterFctLoad(drv.Get)
+			kvs.RegisterFctStore(drv.Set)
+
+			res = append(res, kvs)
+		}
+
+		return res, nil
+	}
+}
diff --git a/errors/modules.go b/errors/modules.go
index 05006e8..9887d27 100644
--- a/errors/modules.go
+++ b/errors/modules.go
@@ -34,7 +34,11 @@ const (
 	MinPkgConfig         = 500
 	MinPkgConsole        = 800
 	MinPkgCrypt          = 900
-	MinPkgDatabase       = 1000
+	MinPkgDatabaseGorm   = 1000
+	MinPkgDatabaseKVDrv  = 1010
+	MinPkgDatabaseKVMap  = 1020
+	MinPkgDatabaseKVTbl  = 1030
+	MinPkgDatabaseKVItm  = 1040
 	MinPkgFTPClient      = 1100
 	MinPkgHttpCli        = 1200
 	MinPkgHttpServer     = 1300