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- Newsgroups: comp.dcom.cell-relay
- Path: sparky!uunet!stanford.edu!kronos.arc.nasa.gov!iscnvx!news
- From: myoung@force.ssd.lmsc.lockheed.com
- Subject: Solving a Problem
- Message-ID: <1992Nov16.203247.640@iscnvx.lmsc.lockheed.com>
- Sender: news@iscnvx.lmsc.lockheed.com (News)
- Reply-To: myoung@force.ssd.lmsc.lockheed.com
- Organization: LMSC, Sunnyvale, California
- Date: Mon, 16 Nov 92 20:32:47 GMT
- Lines: 54
-
- Coping with Embedded Processors:
-
- The problem we have is that many of the newer applications, and
- the backward support of the older PC applications involve placing
- some auxiliary processors in the switch; IE routing, distributed disk
- controllers, audio processing and protocol conversion.
-
- Some of the new applications require only access to a switch resident
- path control system; IE transaction routing, distributed data base,
- address discovery, process discovery.
-
- The auxiliary processors allow the building of distributed protocols,
- using a dynamic network architecture. The binding utilizes the
- virtual path; and the discovery and collection of objects utilizes
- a wavefront discovery process. The science of dynamic networks
- has developed in the operating system world, (see ACM Trans
- on Comp Sys, May 1992 for a distributed protocol concept based upon
- the x kernel).
-
-
- For switch vendors the third party supported embedded processor
- does not fit well with distribution channels to which they are
- accustomed. Perhaps the better approach would be to extend the
- virtual path concept into the new unix multiprocessors, essentially
- solving the same problem from the other direction.
-
-
- If the path definition was extended into the multi-processor, then
- discovery and arbitrary connection of operating system "objects"
- would be seemless across the cell-relay to multi-process boundary.
- The cells, reassembled at the interface, continue their movement
- in the multi-processor guided by object linking ID's which are
- mapped to the virtual path. The construction of distributed protocol
- contexts utilizes the wave method; operating as the meta language over
- both the network and the multi-processor, with its interpreters placed
- both in the switch and in the processors. In both instances the wave has
- capability to create binding paths.
-
- Advantages:
-
- The workstation vendors could activate an already existing channel
- of developers. The desktop obtains direct control of distributed
- object linking, supported across the hub with switched paths. The
- problem of host based addressing standards is returned to the computer
- vendors, who have dealt with it more successfully than the communications
- vendors. The switch vendors do not have to expose their architecture
- to third party add on developers.
-
- Disadvantages:
-
- Much of the work on object oriented linking would have to be re-cast
- to support the new virtual path networks resulting in a new standards
- conflict. The meta language control system chosen needs to be supported
- on both sides of the network interface.
-