Service Oriented Architecture

Three basic categories for Storage Virtualization:
1. What is being virtualized
2. Where the virtualization occurs
3. How it is implemented.

What is being virtualized may include disks (cylinder, head, and sector virtualized into logical block addresses), blocks (logical blocks from disparate storage systems may be pooled into a common asset), tape systems (tape drives and tape systems may be virtualized into a single tape entity, or subdivided into multiple virtual entities), file systems (entire file systems may be virtualized into shared file systems), and file or record virtualization (files or records may be

The SOA basic security architecture contains two main security components, a point of contact (PoC) and a trust service. This architecture also specifically illustrates two different point-of-contact elements: a transport layer PoC and a Web services PoC.

1. Managing Security Policies
In advance of interacting with a business partner's SOA resources, you will need to determine appropriate security policies such as requirements for transport and message layer protection as well as data level protection.

2. Defining Transport Security Policies
Transport layer security refers to the type of protection offered in the actual delivery protocols involved in the interaction, such as using secure sockets layer (SSL) over Internet transactions.

3. Defining Message Layer Security Policies
Message layer security allows the system to protect the message body itself (transmitted in the HTTP message body, for example) in terms of integrity and confidentiality; this is on top of any protection applied at the transport level.

4. Defining Data Protection Policies
You can achieve data protection by applying encryption mechanisms to the data-level elements within a message. Although not widely adopted, the notion of data element confidentiality is recognized as critical in many SOA environments (especially those that will be applied within financial and health sector environments).

ebXML: Specifications and standards from the Organization for the Advancement of Structured Information Standards (OASIS) target the creation of an electronic marketplace in which enterprises can meet and interoperate in their businesses. In a recent move, ebXML has created the Electronic Business SOA Technical Committee.

OAGIS: In the automotive industry, the Open Applications Group Integration Specification (OAGIS) also integrates SOA aspects.