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- Newsgroups: comp.dcom.cell-relay
- Path: sparky!uunet!stanford.edu!kronos.arc.nasa.gov!butch!iscnvx!news
- From: myoung@NEBULA.SSD.LMSC.LOCKHEED.COM
- Subject: Re: Application Specific Switching Processors
- Message-ID: <1993Jan11.170056.21910@iscnvx.lmsc.lockheed.com>
- Sender: news@iscnvx.lmsc.lockheed.com (News)
- Reply-To: myoung@NEBULA.SSD.LMSC.LOCKHEED.COM
- Organization: LMSC, Sunnyvale, California
- References: <1992Dec24.045318.18879@unet.net.com> <1993Jan7.091232.13657@unet.net.com> <1993Jan7.193136.28931@berlioz.nsc.com>,<1993Jan11.061952.28086@unet.net.com>
- Distribution: usa
- Date: Mon, 11 Jan 93 17:00:56 GMT
- Lines: 41
-
- In article <1993Jan11.061952.28086@unet.net.com>, earlf@trappist.net.com (Earl Ferguson Adv Dev) writes:
- >
- >The notion of "smart" here is more application oriented than that
- >normally associated with the term "smart hub". The intelligence is
- >highly application specific, allowing an efficient implementation of a
- >highly specialized network for, say, data base searches. Only the
- >switches at the data base nodes need to have the ASSP processors;
-
-
- 1) Distributed Updates from asynchronous sources requires they
- undergo arbitration at some point on the net. If the arbitration
- takes place on the network nodes, then significant reduction in update
- time can be achieved.
-
- 2) Topology knowledge about the net helps in planning a query.
- Whether one does a selection before a join depends upon whether
- the join takes place over T3 lines while the selections take place
- over disparate sales offices connected via slower T1 lines. Hence,
- the application needs to obtain accurate, timely topology information
- which requires some discovery process over the network nodes.
-
- 3) A server would like to have location information concerning a
- set of clients, and possibly ring the clients in an out of band hamiltonian
- circuit for flow control.
-
- 4) Arbitrary data searches are faster when done with a general exploration
- of the physical network, requiring splitting of the message at various
- nodes. Application specific spanning trees which cover a closed
- universe of storage units allows discovery of data items having flat
- addresses which may be located anywhere in the closed universe.
-
- 5) Most of the sophisticated diagnostic and sniffer functions required
- in the new networks require flexible access to the intermediate nodes.
-
- Technically one might develop a sharp separation between network management
- and applications but market efficiency requires that the physical resources
- be turned over to the application via some flexible messaging layer.
-
- Remember Microsoft's stated intent: To put the entire enterprise data
- structure under the semantic model (Info World), and this will include
- network objects.
-