Emc IP Holding Company LLC

Emc Corporation

Yan Xu

Michael C Brundage

Nagapraveen Veeravenkata Seela

Kamakshi Viswanadha

Alex Zhongbing Yang

Steve Zhuxiong Ai

Yining Si

Piers Yu

A technique for providing access to a data object serving as a target of snapshot-shipping replication includes taking a system snap of the data object after completion of each of multiple snapshot-shipping updates. In response to receiving a request to take a user snap of the data object, a data storage system redirects the request to a previously generated system snap, so that the data storage system takes the user snap of the system snap rather than taking the user snap of the data object itself.

Creating consistent user snaps at destination during replication

A method is used in managing snapshots of data. Identity information of a snapshot of data is updated. The snapshot represents a state of the data at a particular prior point in time. A new snapshot of the data is created. The new snapshot is created based on the identity information of the snapshot.

Managing snapshots of data

A technique for providing access to a data object serving as a target of snapshot-shipping replication includes taking a system snap of the data object after completion of each of multiple snapshot-shipping updates. In response to a data storage system receiving an IO (input/output) request to read and/or write to the data object, a data storage system redirects the IO request to a previously generated system snap, so that the data storage system performs the operation specified in the IO request on the system snap rather than of the data object itself.

Redirecting host IO's at destination during replication

A method is used in managing recovery of file systems. A determination is made as to whether a file system requires a slice for recovering the file system. Based on the determination, storage is provisioned for the slice. Recovery of the file system is performed.

Managing recovery of file systems

A method is used in managing provisioning of storage in storage systems. Whether a logical object requires a slice for recovering the logical object is determined. Based on the determination, storage for the slice is provisioned. The slice is provided to the logical object.

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Yan Xu