- Berkeley DB Reference Guide:
- Upgrading Berkeley DB Applications
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Log file formats and the Btree, Queue, Recno and Hash Access Method database formats changed in the Berkeley DB 3.1 release. (The on-disk Btree/Recno format changed from version 7 to version 8. The on-disk Hash format changed from version 6 to version 7. The on-disk Queue format changed from version 1 to version 2.) Until the underlying databases are upgraded, the DB->open method will return a DB_OLD_VERSION error.
An additional flag, DB_DUPSORT, has been added to the DB->upgrade method for this upgrade. Please review the DB->upgrade documentation for further information.
For further information on upgrading Berkeley DB installations, see Upgrading Berkeley DB installations.
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