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When to Use

User production and test systems are intended to have all databases in compatible FORMAT 1 during upgrading from the previous release (Version 11.0, also known as r11) to Version 12.0 and to remain in that format until no risk of fallback exists. When all risk of fallback has ceased to exist, all databases can be changed to full Version 12.0 feature support by using FORMAT 2. This option is therefore not intended for user-systems. It exists for special cases where individual databases need to be in a different format to allow for testing or use by QA.