Browse Prior Art Database

Network Selective Resource and Status Information Distribution

IP.com Disclosure Number: IPCOM000121562D
Original Publication Date: 1991-Sep-01
Included in the Prior Art Database: 2005-Apr-03
Document File: 3 page(s) / 124K

Publishing Venue

IBM

Related People

Frantz, W: AUTHOR [+3]

Abstract

Disclosed is a protocol that allows the owner of a resource to notify other interested components of the resource's current specification and status. This reduces current overhead, and provides additional benefit to routing solutions requiring definition and status information at route-determination points. This protocol dynamically dis tributes resource definition and status information to selected nodes in a computer network. The distribution is triggered in real time by the component that is responsible for changes in the resource state. This is important in order to: a) support a single specification of a global resource and avoid multiple resource definitions (by administrators in different nodes of the network), and b) maintain accurate status of global resources (e.g.

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Network Selective Resource and Status Information Distribution

      Disclosed is a protocol that allows the owner of a
resource to notify other interested components of the resource's
current specification and status.  This reduces current overhead, and
provides additional benefit to routing solutions requiring definition
and status information at route-determination points.  This protocol
dynamically dis tributes resource definition and status information
to selected nodes in a computer network.  The distribution is
triggered in real time by the component that is responsible for
changes in the resource state.  This is important in order to:  a)
support a single specification of a global resource and avoid
multiple resource definitions (by administrators in different nodes
of the network), and b) maintain accurate status of global resources
(e.g., user, node, transaction program) for distributed processing.

      This relatively simple technique provides a base intercomponent
interchange without a major burden to existing structures.
Performance is enhanced by blocking information units and selective
propagations of resource updates by class and node.

      The information exchange protocol described supports locally
and remotely attached components and provides dynamic updates of
status throughout the network.  This technique employs existing
definition processes and administrative functions.  Different
functions and characteristics of the protocol are described below.
An example of the protocols illustrating message flows is given in
the figure.

      Connection Requirements:  Component connections are not
dictated in the protocol and it is assumed that different connection
services and message services will be utilized. This permits the use
of existing component interconnections and allows standard systems
services to be employed for different connection types:  memory to
memory, channel to channel or location to location.

      Message Structure:  A message consists of a message header
followed by one or more information units (IUs).  The message header
may be unique to the particular connection. An IU format is defined
for each resource type and for initiation/termination of the resource
exchange protocol. Resource IUs contain:  the date/time (in GMT:
Greenwich Mean Time), the network address of the component that owns
the resource, the resource name and type, and other fields that are
resource-type dependent.

      Initiation:  The first exchange between adjacent nodes is a
START REQUEST IU.  This IU is used to inform the adjacent nodes of
the type of resources desired by each and whether a refresh of the
resources is required. ...