Quantum Scalar 100, Справочное руководство

Страница: 8 / 98

4 Understanding SMI-S, CIM, and MOF
Your Library, SMI-S, and CIM
A CIM server is embedded within the Scalar i500 and Scalar i2000 libraries. The CIM server is SMI-S
compliant and contains a Server profile and several subprofiles. For details about these profiles, refer to
CIM Profiles and Subprofiles on page 7.
Understanding CIM
CIM is an object-oriented information model that describes management information in a network or
enterprise environment. Because it is object-oriented, CIM provides abstraction, inheritance, and
dependency or association relationships between objects within the model. CIM is based on XML and is
platform-independent and technology neutral. Therefore, management application developers do not need
to understand how CIM was implemented on a vendor product. Only the API is required to interact with a
vendor product.
CIM uses a client/server model. The CIM server can either be embedded into the vendor product (as it is
with your library) or it can be implemented by a proxy server that provides the CIM server functionality for
the legacy vendor product. The
CIM client is the management application that communicates with one or
more CIM servers to manage the SAN. The CIM client discovers CIM servers through Service Location
Protocol (SLP) version 2, as defined in RFC 2608. SLPv2 uses UDP port 427 for communication and is a
discovery protocol that is separate from the CIM client/server communication path.
WBEM Initiative
The WBEM initiative is a set of management and Internet standards developed to unify the management of
enterprise computing environments. The WBEM initiative includes the following:
• CIM, which provides a common format, language, and methodology for collecting and describing
management data.
• The CIM-XML Encoding Specification, a standards-based method for exchanging CIM information.
CIM-XML uses an xmlCIM encoded payload and HTTP as the transport mechanism. CIM-XML
consists of the following specifications:
• The xmlCIM encoding, a standard way to represent CIM information in XML format.
• CIM Operations over HTTP, a transportation method that describes how to pass xmlCIM
encoded messages over HTTP.
For more information about the WBEM initiative, go to the DMTF website at http://www.dmtf.org .
Unified Modeling Language
SMI-S relies on object-oriented classes as defined in CIM. These classes are frequently defined using
Unified Modeling Language (UML). To understand SMI-S and the Quantum extensions present in this
document, you must have a basic understanding of CIM classes and UML.
A class is a collection of properties and methods that define a type of object. For example, a generic network
device is a type of object. To describe this object, you could define the
NetworkDevice
class. You could
then define this
NetworkDevice
class with the properties or attributes of a network device, such as
IpAddress
and
DeviceType
. You can also control your network device through the
NetworkDevice
class by adding methods or routines that can trigger specific actions on your network device. Example
methods are
enablePort()
and
rebootDevice()
.