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тАО09-26-2005 09:53 PM
тАО09-26-2005 09:53 PM
A question of migration.....
Just a request for some info.
Currently we develop 5 of our 6 VMS systems on a VMS 7-1-2 Alpha and run 3 of them on DS15s running VMS 7-3-2. The remaining system is developed on a DS10 under VMS 7-3-2 and runs on a DS15 under VMS 7-3-2. So far so good. Things do seem to work.
However, I've been asked to put together a case for retiring the 7-1-2 system and doing all the development on 1 or more DS10s (freed up during the roll-out of DS15s). This of course will cost money and we need to convince the customer that this is good business (as well as technical) sense.
The question is: is there any information regarding the benefits of developing on and running on VMS 7-3-2 which are hedged in a form which our customer (government based and not necessarily technically aware) will understand?
I can give a lot of technical reasons based on new features etc. but will always end up having to answer the question, if it aint broke why fix it?
Hope you can help
Brian
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тАО09-26-2005 09:58 PM
тАО09-26-2005 09:58 PM
Re: A question of migration.....
The new features would allow the development of new business functionality.
I have found that VMS V7.3-2 is faster than V7.1 so system performance may be improved.
Purely Personal Opinion
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тАО09-26-2005 10:57 PM
тАО09-26-2005 10:57 PM
Re: A question of migration.....
Good attitude, but: do they drive their cars until they fall apart?
OpenVMS Developer & System Manager
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тАО09-26-2005 11:02 PM
тАО09-26-2005 11:02 PM
Re: A question of migration.....
Fair point. However the systems in question are best described as soft-real time control systems. They aren't really business critical in the understood sense - but have to work.
What I am trying to do is get all the development onto 7-3-2 fairly soon before I have to consider the move to 8-2. I don't really want to migrate 5 systems to VMS 8-2 in one go.
The migration of the system developed under 7-3-2 to 8-2 (on Itanium) took about a day from initial re-compilation to full system startup. So I'm happy that the effort at that point is minimal.
cheers
Brian
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тАО09-27-2005 12:06 AM
тАО09-27-2005 12:06 AM
Re: A question of migration.....
Being able to test the new features on the development machine (DCL or system services) will be a bonus. At the moment engineers need to find spare production units to test on.
A performance increase (going to new hardware and OS) is one selling point. A build which took 2 hours to complete is now done in 10 minutes (60+ exes).
Hmmm food for thought anyway.
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тАО09-27-2005 12:40 AM
тАО09-27-2005 12:40 AM
Re: A question of migration.....
You don't have to do two things (7.3-2 -> 8.2 and Alpha -> Itanium) in one go. You can go for 8.2 on Alpha first and when you're happy with that, migrate to Itanium - officialy AXP is to be supprted until 2011 - 2012 but my (and other's) guess it will extent beyond that timeframe ;-)
Willem
OpenVMS Developer & System Manager
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тАО09-27-2005 12:44 AM
тАО09-27-2005 12:44 AM
Re: A question of migration.....
I'm already proposing that as a solution. 7-1-2 > 7-3-2 > 8-2 (Alpha) with the jump from 7-1-2 > 7-3-2 being the biggest problem. 7-3-2 to 8-2 (Alpha or Itanium has been easy so far).
cheers
Brian
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тАО09-29-2005 03:34 AM
тАО09-29-2005 03:34 AM
Re: A question of migration.....
Maintenance costs on new systems are much cheaper. Old systems keep going up.
7.3-2 has XFC which is a great file caching program which really helps I/O.
Good luck.
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тАО11-10-2005 10:02 PM
тАО11-10-2005 10:02 PM
Re: A question of migration.....
Camiel.
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тАО11-10-2005 10:05 PM
тАО11-10-2005 10:05 PM
Re: A question of migration.....
Its down to the individual engineers (OK me) to keep the systems up to date.