Netapp, Inc.

Kapil Kumar

John K Edwards

Blake H Lewis

Vijay Mohan Deshmukh

Rajesh Desai

David A Grunwald

Hitesh Sharma

A technique to name data is disclosed to allow preservation of storage efficiency over a link between a source and a destination in a replication relationship as well as in storage at the destination. The technique allows the source to send named data to the destination once and refer to it by name multiple times in the future, without having to resend the data. The technique also allows the transmission of data extents to be decoupled from the logical containers that refer to the data extents. Additionally, the technique allows a replication system to accommodate different extent sizes between replication source and destination while preserving storage efficiency.

Handling data extent size asymmetry during logical replication in a storage system

Method and system for replicating a storage volume is provided. Information is adaptively replicated in a swap mode or a copy mode. When information is copied from a storage volume to a memory buffer, an application determines if another information transfer from the same source volume is pending. If a transfer from the same source is pending, then information is copied from the memory buffer to a stolen buffer in a copy mode. If a transfer from the same source is not pending, then instead of copying the information, the application enables a swap mode. During the swap mode, an operating system for a storage system swaps a pointer from the stolen buffer to information stored in the memory buffer. The memory buffer itself is invalidated so that no other module can access the memory buffer. Because the pointers are swapped, the application accesses information directly from the memory buffer.

Method and system for replicating stored information

Growing community of inventors

Mountain View, CA, United States of America

Kapil Kumar