Proposed-ADIOS2-architecture-based-on-standard-OSI-7-layer-model.md

+# Open Systems Interconnect (OSI) model, ISO/IEC 7498-1 standard references:  
+
+  * [ISO standard](https://www.iso.org/standard/20269.html)
+  * [Microsoft](https://support.microsoft.com/en-us/help/103884/the-osi-model-s-seven-layers-defined-and-functions-explained)  
+  * [Cisco](https://www.cisco.com/cpress/cc/td/cpress/fund/ith/ith01gb.htm)  
+  * [Oracle](https://docs.oracle.com/cd/E18283_01/network.112/e10836/layers.htm)
+  * [IEEE 1983 paper](http://ieeexplore.ieee.org/document/1457043/)
+  
+![](https://alln-extcloud-storage.cisco.com/ciscoblogs/osi-550x425.gif)
+
+Original source: [Cisco](https://blogs.cisco.com/cloud/an-osi-model-for-cloud)
+
+
+# ADIOS2 architecture proposed amendments to comply with the OSI model standard:  
+
+```
+adios2
+│   
+│
+└─── public (rename core, OSI layer 7 application) 
+│   
+└─── engine (layer 7 -> public, system layers 6,5,4 -> protected, private)
+│   
+└─── presentation (OSI layer 6)
+|    |
+|    │   
+|    └─── transform (same)
+|    |    │   
+│    │    └─── compression (bzip2, zfp, szip, ...)    
+|    |    └─── vis   
+│    │   
+│    └─── format
+│    │    │   
+│    │    └─── bp1
+│    │    └─── bp2
+│    |
+│    └─── analytics (can be treated as managing collective transforms)
+│         │   
+│         └─── visVTKm (from hackathon)
+│         └─── pca
+│         └─── SVD 
+│
+│
+└─── session (renaming TransportMan, OSI layer 5)
+│    │   
+│    └─── fileSession
+│    |
+│    └─── dataMan
+│    |
+│    └─── dataSpaces
+|    |
+│    └─── sst
+|
+└─── transport (same, OSI layer 4)
+|    │   
+│    └─── file (POSIX, stdio, fstream, ...)
+│    └─── wan (libZmq, ... )
+│    └─── shmem (SystemV, mmap, ... )
+│    └─── rdma (ibverbs, nvlink, ... )
+|    └─── multitier (ceph)
+|
+|
+└─── interop (same, OSI layers 6,5,4)
+     │   
+     └─── adios1
+     └─── hdf5
+```