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Storage Documentum attributes
We store files created via Documentum to a Centera. For each file in Centera a content object (type dmr_content) is created in Dctm which points to the Centera file.
If we want to store additional attributes on the Centera for each file in Dctm we have to set the field values in the content attributes of the dmr_content object which are automatically stored to the Centera.
Question: Is there another option to store attributes from Dctm to Centera?
Question: What happens if we save a file to Centera and afterwards delete the content attributes in Dctm to save disk space in the database. Are the attributes also removed from the content in the Centera?
holgerjakob_c0722c
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December 22nd, 2009 00:00
Hi
I'm not the Documentum expert and someone in a Documentum forum might be able to answer more precisely.
From what I understand the setting of the content attributes are the only way to write meta-data from documentum to Centera.
I think that changing meta information results in a new version of the object in both Documentum and Centera. The old version is not automatically deleted and still referenced in a different table in Documentum.
In a documentum migration I performed we had to use two select statements to get all versions and the additional versions from the original were created after updating attributes like retention.
select distinct rs.i_contents from dm_ca_store cs, dmr_content_s rs where cs.r_object_id = rs.storage_id order by rs.i_contents asc
select distinct i_contents from dmi_subcontent_r
These were the two statements we used. They may help you understand the way Documentum stores content on Centera. A deletion of content would be possible if the retention has expired.
I hope this helps, Holger
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December 22nd, 2009 01:00
Hi Holger,
thanks a lot. I will check the SQL statements and maybe make a few tests.
Can you propose a Centera document that's worth downloading and reading regarding the behaviour of Centera/Dctm. I can't find much detailed info in the Dctm guides.
holgerjakob_c0722c
337 Posts
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December 22nd, 2009 06:00
Hi
I would assume the Content Services for Centera Documentation and the Centera Product description Guide will give you a good starting point.
Best regards, Holger