Emc IP Holding Company LLC

Chetan Risbud

Kalyan Chakravarthy Gunda

Nitin Madan

Srikant Viswanathan

George Mathew

Bhimsen Bhanjois

Kalidas Balakrishnan

Kedar Sadanand Godbole

Vivek Nambiar

Embodiments of an instant recall process and system for long-term data stored on a cloud storage tier. Embodiments include saving a content handle of a file in a cloud storage tier as an extended attribute in a single file system namespace; moving the file from the cloud storage tier to an active storage tier for data processing; recalling the file from the active storage tier to the cloud storage tier upon completion of the data processing; using the content handle from hidden metadata for a working copy of the file; and saving a hash of a segment reference as part of the extended attribute.

Instant replay of a file to a cloud tier on a deduplication file system

Embodiments are described for performing a storage tier-specific file system operation in a file system that comprises a namespace that spans multiple tiers of storage. A file system command can be a tier-specific deletion of files in a multi-tier file system, or a move data operation from a first tier of storage to a second tier of storage, affecting both the first and second tier of storage. The file system command can generate a copy of the namespace for the first tier of storage and a snapshot of the data of the first tier of storage referenced in the file system operation. Functionality may be performed using one or more storage appliances, each of which can have its open processing system, memory and storage device(s). Storage tiers can include active tier, cloud tier, and remote or archive storage tier.

Method and apparatus to have snapshots for the files in a tier in a de-duplication file system

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Pune, India

Chetan Risbud