Microsoft Technology Licensing, LLC

Gregory J Jacklin

Karan Mehra

Darren Glen Moss

Ravinder S Thind

William R Tipton

Andrew M Herron

Senthil Rajaram

A storage stack delete notification can be received at a storage stack filter. The delete notification can indicate deletion of primary data in a primary storage region. Secondary data that is taking up storage resources managed by the storage stack filter can be identified. The secondary data can be associated with the primary storage region, and the storage resources can be resources other than the primary storage region. It can be determined whether it is useful to have the secondary data continue taking up the storage resources. If having the secondary data continue taking up the storage resources is not useful, then the storage resources can be freed.

Using delete notifications to free related storage resources

A filter between a filesystem and a storage device in a storage stack can be configured to modify a delete notification, such as by modifying an existing delete notification or creating a new delete notification. A storage stack filter can receive an existing delete notification and determine a modified range of deleted data in response to receiving the existing notification, where a modified delete notification indicates the modified range of deleted data. A new delete notification can be created with a storage stack filter positioned below a filesystem in a storage stack, where the new delete notification indicates a range of deleted data. The new or modified delete notification can be passed down the storage stack.

Modifying delete notifications in a storage stack

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Gregory J Jacklin