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From: mason@dsg.Stanford.EDU (Tony Mason)
Newsgroups: comp.protocols.tcp-ip
Subject: VMTP (RFC 1045) Release announcement
Message-ID: <9369@polya.Stanford.EDU>
Date: 22 May 89 20:52:39 GMT
References: <8905191734.AA04830@fji.isi.edu>
Sender: USENET News System <news@polya.Stanford.EDU>
Reply-To: mason@dsg.Stanford.EDU (Tony Mason)
Organization: Distributed Systems Group, Stanford University
Lines: 35


The second release of the UNIX VMTP implementation (corresponding to RFC-1045)
is now available for the Sun-3, Sun-4, Vax, and DECstation 3100 via anonymous
FTP from gregorio.stanford.edu.

There is a vmtp.README file in the directory vmtp-ip on Gregorio which
describes the full distribution (it is distributed with individual pieces
containing the architecture specific sections.)

For those unfamiliar with VMTP here is a brief description of its salient
features:

    - VMTP is a transport level protocol.  This implementation uses the
      Berkeley socket abstraction in 4.3 and 4.3 derived systems.

    - VMTP is a reliable transport protocol providing support for
      "transactions"  rather than UDP's datagrams and TCP's connected
      streams.   It is designed to optimize performance of modern RPC style
      protocols, a service not well filled by either TCP or UDP.

    - VMTP provides real-time capabilities (elimination of checksumming on
      data or on the entire packet,) idempotent responses (e.g. responses
      from a time server,) and high-throughput rates requiring minimal 
      packet exchanges. 

Additional information about VMTP is available in RFC-1045, as well as via
the vmtp-ip mailing list (vmtp-ip@gregorio.stanford.edu.  Add/drop requests
to vmtp-ip-request@gregorio.stanford.edu.)

Tony Mason
Distributed Systems Group
Stanford University
mason@pescadero.stanford.edu

May 22, 1989