diff --git a/donut-metadata.md b/donut-metadata.md
new file mode 100644
index 000000000..df52e1c39
--- /dev/null
+++ b/donut-metadata.md
@@ -0,0 +1,54 @@
+##### Users Collection
+
+```json
+minio: {
+    version: 1,
+    users: [{
+    	secret-key: string,
+    	access-key: string,
+    	status: string // enum: ok, disabled, deleted
+    }],
+    hosts: [{
+    	address: string,
+    	uuid: string,
+    	status: string, // enum: ok, disabled, deleted, busy, offline,
+    	disks: [{
+        		disk: string,
+        		uuid: string,
+        		status: string // ok, offline, disabled, busy
+        }]
+    }]
+}
+```
+
+##### Bucket Collection
+
+```json
+buckets: {
+    bucket: string, // index
+    permissions: string,
+    deleted: bool
+}
+```
+
+##### Object Collection
+
+```json
+objects: {
+    key: string, // index
+    createdAt: Date,
+    hosts[16]: [{
+    	host: string,
+    	disk: string,
+    }]
+    deleted: bool
+}
+```
+
+```json
+meta: {
+    key: string, // index
+    type: string // content-type
+    // type speific meta
+}
+```