Emc IP Holding Company LLC

Gyanesh Kumar Choudhary

Alexander S Mathews

Ruiling Dou

Xianlong Liu

Chang Yong Yu

Philippe Armangau

Jean-Pierre Bono

Ahsan Rashid

Qi Mao

Henry Hao Fang

Yuetao Jiang

A method includes (a) while processing data storage requests from users directed to filesystems of a plurality of filesystems served from a data storage system, receiving a request to execute a filesystem reorganization task on a filesystem of the plurality of filesystems, (b) in response to receiving the request, checking whether the filesystem reorganization task has both a global reorganization token and a filesystem-specific reorganization token, the filesystem-specific reorganization token being specific to the filesystem on which the filesystem reorganization task has been requested to execute, and (c) in response to determining that the filesystem reorganization task does have both the global reorganization token and the filesystem-specific reorganization token, executing the filesystem reorganization task to move a data block from one location within the filesystem to another location within the filesystem. Other embodiments are directed to corresponding apparatuses, computer program products, and systems for performing similar methods.

Techniques for efficiently performing filesystem reorganization tasks for different filesystems

Techniques for shrinking a filesystem backed by a volume identify slices in the volume to be evacuated in order to reach a target size, identify a target endpoint in the volume, and evacuate identified slices to available locations prior to the target endpoint. The same data is typically not moved from slice to slice multiple times.

Efficiently shrinking a dynamically-sized volume

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Edison, NJ, United States of America

Gyanesh Kumar Choudhary