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Impact of Maintaining R5 Format ODS 41 Databases on Domino 6

Category Software Development


If you're in the process of converting over to ND6, this is some good information you should be aware of...  From the Knowledgebase....


Impact of Maintaining R5 Format ODS 41 Databases on Domino 6

Document Number:  1154044

Problem

ODS 41 is the database on-disk structure (ODS) for Domino 5.  ODS 43 is the database disk structure for Domino 6.  What is the impact of maintaining R5 format ODS 41 databases on Domino 6 Servers?


Content

Upgrading to Domino 6 does not require that each database be upgraded to ODS 43.  However, if a customer maintains ODS 41 beyond the upgrade to Domino 6 they should be aware of the impact of this on system loads.  Domino 5 uses a different view index engine than Domino 6; as a result, if ODS41 is maintained, so must the Domino 5 indexes for each view so that the database is usable on a Domino 5 server.  


While running on Domino 6, the server will build new indexes using the new Index engine for Domino 6.  The result is duplicate indexes for each view.  It should also be noted that the index creation will happen on first database access. This will cause higher than normal CPU use and memory use as the new indexes are built.


Indexes can consume a large amount of database storage.  The amount used can be seen from the Files tab of the Domino 6 Administrator client; select the desired file to view the storage consumed by indexes.


The total amount of storage increase will vary, but is based on database content and view complexity.  Customers using database quotas should be wary of exceeding quota limits as a result of creating new indexes.


The ODS 41 indexes will be maintained even after conversion to ODS 43.  Customers wishing to reclaim this storage must run a COMPACT - D on the database.  The indexes for both Domino 5.x and Domino 6.x will be deleted.

Comments

Gravatar Image1 - Good to know. Thanks for posting this, Tom!

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