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Instant file initialization

2013-10-132013-08-30 / Daniel Hutmacher / Leave a comment

When you create (or grow) the size of a database file, SQL Server will initialize the allocated space on the disk, i.e. fill it with zeroes. If you’re adding a large amount of space to your database file, this operation can take quite some time to complete. But just like there’s a “quick format” in most operating systems, you can allocate large chunks of database file space without initializing it. This is called “Instant file initialization” in the world of SQL Server.

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Daniel Hutmacher, Structured Concepts AB

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