Wednesday, March 29, 2006

Web Services

Consistent end-to-end Web services management is impossible
without industry-wide standards development. To address this,
the Organization for the Advancement of Structured Information Standards
(Oasis) is actively developing the Web Services Distributed Management
specification (www.oasis-open.org/committees/tc_home.php?
wg_abbrev=wsdm). WSDM defines a protocol for the interoperability
of management information and capabilities via Web services.To resolve
distributed system management problems,WSDM focuses on two distinct
tasks: management using Web services (MUWS) and management of
Web services (MOWS).1
MUWS addresses the use ofWeb services technologies as the foundation
of a modern distributed systems management framework.This
includes using Web services to facilitate interactions between managed
resources and management applications. In particular, MUWS defines how
to describe managed resources’ manageability capabilities using WSDL
documents. Expressing these capabilities enables more efficient discovery
and introspection of resources: because managers typically focus on a particular
management task or domain, they must be able to easily and efficiently
determine a manageable resource’s relevant capabilities.
With MOWS,the WSDM addresses the specific requirements for managing
Web services themselves. In WSDM,Web services are the platform
for providing essential distributed computing functionality, interoperability,
loose coupling, and implementation independence. The MOWS specification
is based on the MUWS specification’s concepts and definitions. As
with MUWS,MOWS aims to build on existing model frameworks to define
a Web service’s management model, rather than reinvent a general
managed-resource object model scheme.

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