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ITIL :: View topic - Relationship Defining in CMDB
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Relationship Defining in CMDB

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Joined: Nov 28, 2007
Posts: 1

PostPosted: Thu Nov 29, 2007 3:57 am    Post subject: Relationship Defining in CMDB Reply with quote

How define relationship of CI's in the CMDB Concept, please help.
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Joined: Sep 16, 2006
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Location: London, UK

PostPosted: Thu Nov 29, 2007 8:15 am    Post subject: Reply with quote

A little more context is needed.

Bit in general the relation ship between CI s in the CMDb depends on the CIs
John Hardesty
ITSM Manager's Certificate (Red Badge)

Change Management is POWER & CONTROL. /....evil laughter
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Joined: Oct 12, 2007
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Location: Ireland

PostPosted: Sat Dec 01, 2007 2:59 am    Post subject: Reply with quote


yes it depends on 1) to what level are you planning to record CI's 2) on the type of CI's you are recording 3) the capability of the CMDB to make the required and identified relationships.

3 is a consideration but shoul dnot be a show stopper.
Mark O'Loughlin
ITSM / ITIL Consultant
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Joined: Oct 26, 2007
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Location: Calgary, Canada

PostPosted: Tue Dec 04, 2007 9:14 am    Post subject: Reply with quote

Mark, I agree, but I would go a step further.
I always start with a question of what purpose does CMDB serve. We all know that many companies use CMDB as a dumping ground for all of their gear and then define relationship based on some unclear criteria just because 'it makes sense'. Little thought is given to what value you, as an organization, looking to extract from CMDB, especially in relation to business service management.

Hypothetically, if you have SLM established, or in planning, one of the things your CMDB will need to tell you is how a specific CI is related to a Service that business provides. From Incident management perspective you want to know a degree impact on a service in order to establish your priority for resolving a specific incident. Consequently, relationships in your CMDB should be built in a way that will provide you with required information. E.g. server A hosts database B which enable Application C which enables generation of financial statements for the company. So if Server A is not available and it is not available at the end of the fiscal, your CMDB better tell you that the priority of this Incident is Urgent, otherwise the company will be faced with legal and regulatory consequences.

I know this is a generic trivial example, but I hope it illustrates what should be taken into consideration when looking and building relationships in CMDB.

I welcome other suggestions and ideas as I am sure there are many great information and experiences I would like to be exposed to.


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Location: UK

PostPosted: Fri Jan 25, 2008 10:59 am    Post subject: Reply with quote

Have a look at the BCS-CMSG web site. They ran an event in December called designing the CMDB and the presentations are downloadable. Various practitioners covered the different viewpoints and it may help with internal communication or direction.

I presented at the event at thought it was well balanced and helped to unpick the confusion caused by the ITIL CMDB concept.

A key message was to make your CMDB as small as possible - it may then deliver the value you want. If you try to put everything in it you will fail to get the intended benefits - as most CMDB programmes do.

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PostPosted: Thu Jan 31, 2008 5:01 am    Post subject: Reply with quote

Hi, one thing that I find is when most people talk about Configuration Management, they mainly focus in on the CMDB. The CMDB is but one aspect of the Configuration Management Process. As you work through and define your Configuration Management process, you should be able to start to define the appropriate information to keep within your CMDB. You should be involving many stakeholders who may have an interest in using the information. You will then need to decide what information stays, and what is held elsewhere.

I agree with Cotswolddave in that many people try to make the CMDB the dumping ground and will be bound to fail, however, I would like to say, keep track of the appropriate information, and allow for growth as your needs will and should change as the business grows.

Azard Omardeen
ITIL Expert / Accredited Trainer / ITSM Consultant
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