AIX DS references

[Charlie Sauer]

Let me try to clarify a few points that have been raised in recent 
discussions and point to some references.

Protocols: AIX DS uses SNA LU 6.2 for network protocols.  This is
           true for the currently available version on the RT and for
           DS 1.2, which is scheduled to be available on the RT in June.  
	   The DS on 6.2 implementation exploits performance hooks 
	   and other functions in 6.2, e.g., authentication mechanisms.
	   (Agressive caching strategies are also used, as discussed in 
	   the references.)

	   An IP based implementation, DS 1.3, is scheduled to be available
	   on the RT and the PS/2 in March 1989.

Media: DS as currently available runs on Ethernet and SDLC links.  DS 1.2
       will also run on Token Ring and 802.3.  6.2 has it's own Ethernet
       type field, so IP based functions, e.g., UDP, TCP, NFS, ... can
       run on the same Ethernet as DS and 6.2.  Similarly, both 6.2 and IP
       can run on the same Token Ring or 802.3 wires.

NFS coexistence:  NFS 3.2 is scheduled to be available on the RT in September.
		  The NFS and DS 1.2.1 implementations are designed to be
		  able to run on the same machine, make the same files 
		  available for mounting and allow both NFS and DS clients
	          to have the same files open.

Here's a list of the DS papers written so far:
 
1. C.H. Sauer, D.W. Johnson, L.K. Loucks, A.A. Shaheen-Gouda and T.A.
   Smith, "RT PC Distributed Services Overview," Operating Systems
   Review 21, 3 (July 1987) pp. 18-29.

2. C.H. Sauer, D.W. Johnson, L.K. Loucks, A.A. Shaheen-Gouda and T.A.
   Smith, "RT PC Distributed Services: File System," ;login: 12, 5
   (September/October 1987) pp. 12-22.

3. J. Levitt, "The IBM RT Gets Connected," BYTE 12, 12 (1987)
   pp. 133-138.

4. C.H. Sauer, D.W. Johnson, L.K. Loucks, A.A. Shaheen-Gouda and T.A.
   Smith, "Statelessness and Statefulness in Distributed Services,"
   UniForum 1988, pp. 145-155.

5. C.H. Sauer, "Presenting a Single System Image with Fine Granularity
   Mounts," (not yet published, but available in hard copy by request).
-- 
Charlie Sauer   Dept D18, Bldg 802       uucp: ut-sally!ut-emx!ibmaus!sauer
                IBM AES/ESD, Austin, TX csnet: ibmaus!sauer at EMX.UTEXAS.EDU
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                                         vnet: SAUER at AUSVM6