Conditional Shadows

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You can define a shadow in a way that if that shadow replaces a database, the server creates a new shadow file. This allows shadowing to continue uninterrupted. A shadow defined with this behavior is called a conditional shadow.

To create a conditional shadow, specify the CONDITIONAL keyword with the CREATE SHADOW statement. For example,

CREATE SHADOW 3 CONDITIONAL 'atlas.shd';

Creating a conditional file directs InterBase to automatically create a new shadow. This happens in either of two cases:

• The database or one of its shadow files becomes unavailable.
• The shadow takes over for the database due to hardware failure.