Following our discussions from last week I want to comment
on the Datacenter Service Hierarchy presented.
This actually relates to the definitions of the terms we
The terms used in the proposed hierarchy are:
- IT Service
- Resource -> ManagedElement
There are no suggested definitions for those terms (not any
that I found in the DCML docs that is).
I looked for reference at the terms used in the ITIL for
Industry - isn’t defined
Business - isn’t an item by itself (a business
unit is for example)
Service (referring to IT service)
Host is what we call a server, including the application running
I suggest we first define the following:
- Everything one can manage can be a ManagedElement, not
just the Resources. An IT service, one is sure to manage, for example can
be a ManagedElement as well.
- As suggested, a resource can be any combination of
resources as well.
- An IT service is easily defined. It could also be
comprised of a combination of any IT services.
- By a business I think we should refer to an IT service that
serves a business purpose. The term that was used was Business Process
Service, why not keep it?
- Industry still needs better definition
Specific examples would get us going easily…
- A server is a resource
- A bunch of servers are yet another resource
- A Storage device is a resource
- An IT personnel is a resource
- A web service is an IT service
- A naming service is an IT service
- Printing is an IT service
- CRM is a business (I suggest we call it a business process
- A call center is a business (I suggest we call it a business
Some questions and suggestions
- As the name of the TC goes – what is an
- I think that by application we actually refer types of
- How do we relate to the Networking TC?
- Is Networking a Resource?
- Is Networking a Service?
- I suggest we let Networking be a combination of
Resources and Services
- How do we refer to the SW application part of the
- We defined the web application by a group of resources
but the web application doesn’t have to be part of the resources
- How do we refer to the web application SW?
- We can enlarge the server resource as the ITIL does to
include the application it runs. This would mean that a service is
comprised of physical resources, logical resources (i.e. application SW)
and human resources
- How do we differ between IT services and business
- I think we should allow both of them to be types of
- The only difference is the User/Customer perspective
- This means that Business Process Services are just
another type of services
The new proposed hierarchy looks like:
- Industry (needs better definition)
- Services – Business Process Services, IT
- Resource – Physical Resources, Logical
Resources, Human Resources
Where all of the above can be ManagedElements.
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