Emc Corporation

Emc IP Holding Company LLC

Nvidia Corporation

Nvidia Technologies, Inc.

Sandeep Joshi

Hsing Yuan

Hymanand Nellore

Ravi Venkata Batchu

Christopher J Newburn

Suchit Kaura

Akilesh Kailash

Kiran Kumar Modukuri

Saptarshi Sen

Moiz Haidry

Mohd Fahadullah

Vikrama Reddy

Kamal J Charan

Prasad Krishnan

Joseph Jobi

Narain Coimbatore Ramadass

Jeff Miller

Apparatuses, systems, and techniques to route data transfers between hardware devices. In at least one embodiment, a path over which to transfer data from a first hardware component of a computer system to a second hardware component of a computer system is determined based, at least in part, on one or more characteristics of different paths usable to transfer the data.

Techniques to transfer data among hardware devices

Implementations disclosed herein provide for cauterizing portions of a snapshot. A file and/or directory or a set of files and directories of a snapshot can be identified via a user request or an automated process for cauterization. When cauterized, if a previous snapshot does not contain a ditto entry to the portion of the current snapshot that is requested to be cauterized, the BADDR associated with the cauterized portion of the snapshot can be freed for other storage use. In some implementations, metadata associated with the data that is cauterized can be retained for other uses.

Snapshot cauterization

Implementations are provided herein for incremental backup using a change tree. A change tree is a database file for tracking file system changes of a specific dataset, such as a directory of a file system. A backup process can create and/or initiate a change tree when creating a backup snapshot of a dataset. After the change tree is created, all file system changes inside the dataset can be tracked. The next incremental backup can then take advantage of the change tree to backup changes without traversing the entire dataset. Thus, incremental backups can be more efficient and are better able to keep up with tape streaming speed.

Change tree incremental backup

The subject disclosure is directed towards the parallel backing up of a file system. A file system tree structure is walked by parallel workers that write file system data to data storage devices in parallel streams. Work assigned to one worker may be split to an idle worker to provide parallel operation. Relationship data that maintains relationships between the streams is persisted (e.g., via reference data inserted into the streams) so that a restore mechanism is able to stitch the streams together back into the file system data. Also persisted is location data that maintains storage locations of the streams. A file's data also may be written into parallel streams.

Parallelizing backup and restore for network-attached storage

Growing community of inventors

Campbell, CA, United States of America

Sandeep Joshi