Efficient snapshot activation

A system comprising:

• at least one processor;
• and
• a memory comprising code stored thereon that, when executed, performs a method of providing snapshots of logical devices comprising:
• responsive to the first request, performing first processing including storing first information in a cache slot, the first information identifying the first snapshot and the logical device used as a source of the first snapshot;
• receiving a second request to activate one or more snapshots, including the first snapshot, identified by information stored in the cache slot;
• responsive to receiving the second request, performing second processing including initiating execution of an asynchronous process that performs snapshot activation processing for the one or more snapshots identified by the cache slot;
• prior to receiving the second request, receiving a third request to create a second snapshot of a second logical device, the third request identifying the handle to the cache slot;
• and
• responsive to the third request, performing third processing including:
• performing create processing for the second snapshot;
• setting a pending activate indicator associated with the second snapshot and the second logical device;
• and
• storing second information in the cache slot, the second information identifying the second snapshot and the second logical device used as a source of the second snapshot.

A non-transitory computer readable medium comprising code stored thereon that, when executed, performs a method of providing snapshots of logical devices comprising:

• receiving a first request to create a first snapshot of a logical device;
• responsive to the first request, performing first processing including storing first information in a cache slot, the first information identifying the first snapshot and the logical device used as a source of the first snapshot;
• receiving a second request to activate one or more snapshots, including the first snapshot, identified by information stored in the cache slot;
• responsive to receiving the second request, performing second processing including initiating execution of an asynchronous process that performs snapshot activation processing for the one or more snapshots identified by the cache slot;
• prior to receiving the second request, receiving a third request to create a second snapshot of a second logical device, the third request identifying the handle to the cache slot;
• and
• responsive to the third request, performing third processing including:
• performing create processing for the second snapshot;
• setting a pending activate indicator associated with the second snapshot and the second logical device;
• and
• storing second information in the cache slot, the second information identifying the second snapshot and the second logical device used as a source of the second snapshot.