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real-time
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... transaction, etc.
- Distributed real-time control with prioritized message
handling, including datagrams, multicast and asynchronous ...
... facility with the same naming, transmission and reception facilities as
the normal transport level is a powerful asset for real-time and
parallel applications. Finally, security is a basic requirement ...
... message structure, reliability, flow control, streaming, real-time,
security, byte-ordering and management. Chapter 3 describes the ...
... request message. (Section 2.7.)
- Support for real-time communication with idempotent message
transactions with minimal server overhead ...
... header and the segment data.
Optionally (for real-time applications), the checksum may apply only to
the packet header ...
... Real-time Communication ...
...
VMTP provides three forms of support for real-time communication, in
addition to its standard facilities, which make it applicable to a wide
range of real-time applications ...
... real-time communication, in
addition to its standard facilities, which make it applicable to a wide
range of real-time applications. First, a priority is transmitted in
each Request and Response ...
... VMTP provides several control bit flags to modify the handling
of Requests and Responses for real-time requirements. First, the
...
... The additional code complexity is minimal. We feel that the overhead
for providing these real-time facilities is minimal and that these
facilities are both important and adequate for a wide class of real-time
applications ...
... real-time facilities is minimal and that these
facilities are both important and adequate for a wide class of real-time
applications.
Several of the normal facilities of VMTP ...
...
Several of the normal facilities of VMTP appear useful for real-time
applications. First, multicast is useful for distributed, replicated
(fault-tolerant) real-time applications ...
... real-time
applications. First, multicast is useful for distributed, replicated
(fault-tolerant) real-time applications, allowing efficient state query
...
... update for (for example) sensors and control state. Second, the DGM
or idempotent flag for Responses has some real-time benefits, namely: a
Request is redone to get the latest values when the Response is lost,
rather than just returning the old values. The desirability of this
...
... transactions from that Client, if any, provides the "most recent
is most important" handling of processing that most real-time
applications require.
In general, a key design goal of VMTP ...
... was provide an efficient
general-purpose transport protocol with the features required for
real-time communication. Further experience is required to determine
whether this goal has been achieved.
...
... This experimental extension of the protocol is focused on support for
fault-tolerant real-time distributed systems required in various
critical applications. It may be ...
... checksum has only been calculated
on the header. This is used in some real-time
applications where the strict correctness of the data is
not needed.
...
... lower order bits of a 1 second clock. The clock
need not represent real-time but must never be set back after a crash.
In a simple implementation, using the low order bits of a clock as the
...