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Rahul Agrawal
New User
Joined: 19 Jul 2010 Posts: 9 Location: Noida
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Hello,
I need to understand the practical significance of GDG version.
e.g. in GDG generation G0002V00, what is the use of V00.
I have tried and seen that if we manually create new version of an existing generation then old version is deleted. So at one time one GDG generation can have only one version.
So why version is at all required?
I tried to find the answer on internet but didn't get satisfactory answer. |
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Akatsukami
Global Moderator
Joined: 03 Oct 2009 Posts: 1788 Location: Bloomington, IL
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I have heard (but not verified; some of the other senior people posting here may have better and/or more information than I) that the version number is a feature that IBM never got around to actually using. |
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superk
Global Moderator
Joined: 26 Apr 2004 Posts: 4652 Location: Raleigh, NC, USA
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The best use I know of is to replace an existing generation with an updated one. Here's a potential scenario:
The application has already processed and cataloged the new generation. After some period of time, an audit has shown the data to be incorrect. So, the application is fixed and re-run. But, it's required that the generation level be maintained. So, the updated dataset is cataloged to the existing generation, but to version V01. Version V00 is then removed from the GDS. |
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dick scherrer
Moderator Emeritus
Joined: 23 Nov 2006 Posts: 19244 Location: Inside the Matrix
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Hello,
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I need to understand the practical significance of GDG version. |
If you are an application developer or application support person, there is no practical reason to be concerned with the V00 (version).
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So why version is at all required? |
It is rarely (i.e. almost never) required - unless someone has gotten too creative and made life more complicated.
I'd recommend that this be something you are aware of and never use. . .
Do you have some specific question? |
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Rahul Agrawal
New User
Joined: 19 Jul 2010 Posts: 9 Location: Noida
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Thanks superk and dick.
I do not have any specific question. Its just that I wanted to understand the use of version.
Thanks.. |
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Anuj Dhawan
Superior Member
Joined: 22 Apr 2006 Posts: 6250 Location: Mumbai, India
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Phrzby Phil
Senior Member
Joined: 31 Oct 2006 Posts: 1042 Location: Richmond, Virginia
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Quote: |
I have tried and seen that if we manually create new version of an existing generation then old version is deleted. So at one time one GDG generation can have only one version.
So why version is at all required?
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You answered your own question.
Precisely to replace a given generation, in its place in the sequence of all extant generations, with a different (presumably correct(ed)) version of that generation. |
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Phrzby Phil
Senior Member
Joined: 31 Oct 2006 Posts: 1042 Location: Richmond, Virginia
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Quote: |
have heard (but not verified; some of the other senior people posting here may have better and/or more information than I) that the version number is a feature that IBM never got around to actually using.
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IBM does not use these features. We applications developers do. If you replace G1234V00 with G1234V01, then you are using the feature.
Agreed - it's rare - but nice to use if needed. |
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