Netapp, Inc.

Network Appliance, Inc.

Amol Dixit

Wesley R Witte

Joseph P CaraDonna

To promote an image, an identification of at least one of an symbol name and an existing symbol value associated with the symbol name is received. An identification of a new symbol value is also received. It is then determined that a binary file that is a component of an unpromoted image is to be modified, wherein the image has previously been compiled and linked. The binary file is read to find occurrences of at least one of the symbol name or the existing symbol value in the binary file. The existing symbol value is replaced with the new symbol value to promote the image. The image is promoted without recompiling or relinking the binary file.

In-place image promotion

A technique supports Change Notify watches in virtualized storage systems. In particular, techniques of the present invention advantageously emulate Change Notify features (e.g., as documented by the CIFS protocol) on virtualized storage systems by leveraging virtualization mapping information (e.g., an inode-to-path or 'I2P' mapping) to walk a file system tree backwards from the data blocks to their ancestors to determine whether there are applicable watches on ancestor directories, and to obtain a pathname (e.g., relative) of the watched (changed) data. In particular, changes to data received from different protocols (e.g., CIFS, NFS, HTTP, etc.) can trigger watches to clients on the virtualized storage system. Also, performance may be enhanced using various caching techniques, and watch state may be retained while moving watched data across volumes of the virtualized storage system.

System and method for supporting change notify watches for virtualized storage systems

A technique supports Change Notify watches in virtualized storage systems. In particular, techniques of the present invention advantageously emulate Change Notify features (e.g., as documented by the CIFS protocol) on virtualized storage systems by leveraging virtualization mapping information (e.g., an inode-to-path or 'IP' mapping) to walk a file system tree backwards from the data blocks to their ancestors to determine whether there are applicable watches on ancestor directories, and to obtain a pathname (e.g., relative) of the watched (changed) data. In particular, changes to data received from different protocols (e.g., CIFS, NFS, HTTP, etc.) can trigger watches to clients on the virtualized storage system. Also, performance may be enhanced using various caching techniques, and watch state may be retained while moving watched data across volumes of the virtualized storage system.

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Cambridge, MA, United States of America

Amol Dixit