diff --git a/k8s/README.md b/k8s/README.md
index 88ca147..c35cc9c 100644
--- a/k8s/README.md
+++ b/k8s/README.md
@@ -106,6 +106,14 @@ for i in $( echo $namespaces ) ; do
 done
 ```
 
+## openebs
+
+Formerly installed using the helm operator, may now be updated using the following command:
+
+```sh
+helm upgrade --install -f openebs/openebs.yml --name openebs --namespace openebs stable/openebs
+```
+
 ## networking with calico
 
 Install calicoctl in cluster
@@ -303,6 +311,16 @@ kubectl apply -f minio
 kubectl apply -f datalab/
 ```
 
+## Benchmark with dbench
+
+Should be usually uncommented, but dbbench may be executed to check speed of local filesystem:
+
+```sh
+k create ns dbench
+k apply -f dbench/
+k delete -f dbench
+```
+
 ## Web
 
 ```sh
diff --git a/k8s/dbench/dbench.yml b/k8s/dbench/dbench.yml
new file mode 100644
index 0000000..cb16dd8
--- /dev/null
+++ b/k8s/dbench/dbench.yml
@@ -0,0 +1,39 @@
+kind: PersistentVolumeClaim
+apiVersion: v1
+metadata:
+  name: dbench
+  namespace: dbbench
+spec:
+  storageClassName: openebs-hostpath
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 5Gi
+---
+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: dbench
+  namespace: dbbench
+spec:
+  template:
+    spec:
+      containers:
+      - name: dbench
+        image: sotoaster/dbench:latest
+        imagePullPolicy: IfNotPresent
+        env:
+          - name: DBENCH_MOUNTPOINT
+            value: /data
+          - name: FIO_SIZE
+            value: 1G
+        volumeMounts:
+        - name: dbench-pv
+          mountPath: /data
+      restartPolicy: Never
+      volumes:
+      - name: dbench-pv
+        persistentVolumeClaim:
+          claimName: dbench
+  backoffLimit: 4
\ No newline at end of file
diff --git a/k8s/mailu/backup.secret.yml b/k8s/mailu/backup.secret.yml
new file mode 100644
index 0000000..2c39128
--- /dev/null
+++ b/k8s/mailu/backup.secret.yml
@@ -0,0 +1,45 @@
+kind: ConfigMap
+metadata:
+  creationTimestamp: null
+  name: rclone-dropbox-config
+  namespace: mailu
+apiVersion: v1
+data:
+  rclone.conf: |
+    [dropbox]
+    type = dropbox
+    token = {"access_token":"17hvEArIh3cAAAAAAAGTXUfwkGdz8EC_rDcEseLmSRltQoUz_AVceuUewx0sGMQ1","token_type":"bearer","expiry":"0001-01-01T00:00:00Z"}
+---
+apiVersion: batch/v1beta1
+kind: CronJob
+metadata:
+  name: backup-mailu
+  namespace: mailu
+spec:
+  schedule: "30 4 * * *"
+  jobTemplate:
+    spec:
+      template:
+        spec:
+          containers:
+          - name: backup-mailu
+            image: iptizer/swiss
+            volumeMounts:
+            - name: rclone-dropbox-config
+              mountPath: /rclone.conf
+              subPath: "rclone.conf"
+            - mountPath: /data/
+              name: data
+            command:
+              - "/bin/bash"
+              - "-c"
+            args: 
+              - "cd / && tar zcvf - /data/ | /usr/bin/rclone --config /rclone.conf -v rcat dropbox:server_backup/$( /bin/expr $( date +%m ) % 3 )_$( /bin/expr $( date +%j ) % 3 )_mailu.tar.gz"
+          volumes:
+          - name: rclone-dropbox-config
+            configMap:
+              name: rclone-dropbox-config
+          - name: data
+            persistentVolumeClaim:
+              claimName: mailu-storage
+          restartPolicy: Never
diff --git a/k8s/mailu/mailu.secret.yml b/k8s/mailu/mailu.secret.yml
new file mode 100644
index 0000000..4fb074f
--- /dev/null
+++ b/k8s/mailu/mailu.secret.yml
@@ -0,0 +1,34 @@
+mailuVersion: master
+hostnames: 
+    - mail.moritzgraf.de
+    - moritzgraf.de
+domain: moritzgraf.de 
+secretKey: fa5faeD9aegietaesahbiequ5Pe9au
+subnet: 10.233.0.0/16
+
+clamav:
+  enabled: false
+
+admin:
+  resources:
+    requests:
+      memory: 200Mi
+      cpu: 100m
+    limits:
+      memory: 500Mi
+      cpu: 500m
+
+dovecot:
+  resources:
+    requests:
+      memory: 200Mi
+      cpu: 100m
+    limits:
+      memory: 500Mi
+      cpu: 500m
+
+certmanager:
+  issuerType: ClusterIssuer
+  issuerName: "letsencrypt-prod"
+persistence:
+  storageClass: openebs-hostpath
\ No newline at end of file
diff --git a/k8s/mailu/restore.yaml b/k8s/mailu/restore.yaml
new file mode 100644
index 0000000..c2b4e37
--- /dev/null
+++ b/k8s/mailu/restore.yaml
@@ -0,0 +1,25 @@
+apiVersion: v1
+kind: Pod
+metadata:
+  creationTimestamp: null
+  labels:
+    run: restore
+  name: restore
+spec:
+  containers:
+  - image: iptizer/swiss
+    name: restore
+    resources: {}
+    volumeMounts:
+    - mountPath: /data/
+      name: data
+    command:
+      - "sleep"
+      - "3600"
+  dnsPolicy: ClusterFirst
+  restartPolicy: Never
+  volumes:
+  - name: data
+    persistentVolumeClaim:
+      claimName: mailu-storage
+status: {}
diff --git a/k8s/openebs/openebs.yml b/k8s/openebs/openebs.yml
index a930ff8..c956f03 100644
--- a/k8s/openebs/openebs.yml
+++ b/k8s/openebs/openebs.yml
@@ -1,17 +1,3 @@
-# # status: implemented
 
-apiVersion: helm.fluxcd.io/v1
-kind: HelmRelease
-metadata:
-  name: helm-openebs
-  namespace: flux
-spec:
-  releaseName: openebs
-  targetNamespace: openebs
-  chart:
-    repository: https://kubernetes-charts.storage.googleapis.com
-    version: 1.9.0
-    name: openebs
-  values:
-    analytics:
-      enabled: false
\ No newline at end of file
+analytics:
+  enabled: false
\ No newline at end of file