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We've used DDM and RRR|Chive successfully on various projects. Misi's tool is scriptable and very fast compared to DDM. DDM can schedule code and data migrations. Generally both require the Last-Modified date/time field to be accurate. Overall, I'd personally recommend RRR|Chive.
I have to disagree. We used DDM with great success but it does require admin freeze on all deletion activities of your production environment. That said, there are ways to get around that as well but purging the form in question on your target server and telling DDM to just pull everything over.
Once you get to the point where you are running DDM every few days, the errors are easy to identify and clean up and you can re-run a specific package as needed.
From: Action Request System discussion list(ARSList) [mailto:arslist@ARSLIST.ORG] On Behalf Of Mohamed Kamruzzaman
Sent: Wednesday, April 19, 2017 5:50 AM
Subject: [Non-DoD Source] Re: need input about data migration after Upgrade
Agree with Vinod, you may want to look at alternate solution considering you are looking at migrating and cleaning your data. You will want to migrate over foundation, configuration and transactional data onto ITSM 9.x . This is an ideal time to clean up data, remapping Prod cats and Op Cats etc. and potentially archive some of the tickets that you no longer need.
We use our Customer Move Tool (more info [CAUTION] http://www.alderstone.com/cmt) for the migration from previous ITSM versions to the latest, as we can migrate all modules data or a reduced set (including transformation and cleaning of data), depending on your requirements. In general we've been able to move entire data set within a day ensuring a smooth migration. Please let me know if you would like to talk about this in more detail or have any specific questions.
Mohamed Kamruzzaman. Alderstone.com +962776723269 | firstname.lastname@example.org | Skype: mkamruzzaman | LinkedIn: Mohamed-Kamruzzaman
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