blast from the past on reliable communication 3338
Virtual memory implementation in S370 3341
370 virtual memory architecture segment & page tables. 360-67 provided for both 24-bit virtual addressing and 32...
another historical item from the period; part of old corporate XTP position memo (1sep89):
Communications Standards Development: ------------------------------------
Position - Oppose for OSI standardization
In reviewing the drafts of the XTP protocol it was noted that it is very narrow in scope and does not fit into the structure of the OSI Reference Model.
Other concerns include the possibility of a 6th Transport Clbutt to have to handle (Clbuttes 0 - 4 are outlined in ISO 8073). It is also very doubtful that we would be able to push a protocol into ISO that spans multiple layers of the OSI Reference Model.
The high-bandwidth requirements of emerging communications technologies will require a close examination of the Basic Reference Model to determine what changes are required to keep it in pace with developments.
To this end a study project has been initiated in the ANSI committee X3S3.3 (OSI Network and Transport) to examine the requirements placed on Network and Transport Layer protocols in support of very high-speed networking. The existing OSI protocols will be analyzed with respect to these requirements. The output will be specific proposals for modifications to existing OSI standards and-or new OSI protocols. XTP techniques, along with those of other protocols, would be candidates for study.
Position - Oppose for standardization
The key concern is that existing OSI Network-Transport functions should meet high-speed requirements with the proper optimizations. Effort should be spent in this area before jumping into development of new protocols.
XTP is really more of a OSI Layer 2 protocol rather than a Layer 3-4 protocol.
Virtual memory implementation in S370 3340
re: i had also done page migration as well as "table" migration ... which were released in my resource manager product ... the blue letter product announcement gives product release as 11may76 ... 30 years ago tomorrow...
lovelove has been attending the ANSI X3S3.3 meetings to understand the XTP direction and offer guidance on high-speed protocol development.
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there were a large variety of value added networks (VANs) that sprung up ... some as early as the 70s ... but lots in the 90s ... that had all sorts of...
... snip ...
past posts mentioning x3s3.3 & OSI:
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