Explained first idea

README.md

@@ -7,6 +7,7 @@ Table of Contents
 =================
 <!-- TOC -->
 - [1. Description](#1-description)
+    - [1.1. The Idea](#11-the-idea)
 <!-- /TOC -->
 
 <br>
@@ -19,3 +20,36 @@ This is for me a deeper dive into the C language and FUSE with the library [libf
 
 <br>
 
+## 1.1. The Idea
+
+1\. The idea is to connect multiple sites in a mesh-network-topology.
+
+2\. The filesystem makes all files from all sites available at each site in a combined view.
+
+```
+/mnt/ltdfs/
+\ siteA-Readme.md
+\ siteB-Readme.md
+```
+
+3\. Each file has certain metadata to identify location and owner.
+
+```
+siteA-Readme.md
+---
+Availability:
+  - SiteA
+  - SiteB
+Owner: SiteA
+```
+
+4\. When reading, first the local cache is checked and then one or even multiple sites are chosen to load the file. 
+
+5\. When writing, if the file is available locally, an ownership-transfer is requested with the owner-site.<br>
+When the Ack comes back, the file is available to be written to **locally**.<br>
+Ownership-transfers are synced immediately through the network from the owner-site.
+
+If the file was not available locally, a Write-lock-request is send to the owner-site.<br>
+When the Ack comes back, the file will be written **write-through**.<br>
+Lock-Requests are not synced and expire after no data has flown for a period of time.<br>
+Writing remotely to a file without a lock-request is rejected.