Dell Products Inc.

Emc IP Holding Company LLC

Santi Gopal Mondal

Kalyan Chakravarthy Gunda

Shashank Prakash Khobragade

Arun Vishnu Pk

Jagannathdas Rath

Veera Venkata Prasad Jagarlamudi

Resources of a deduplicated storage appliance are monitored to generate a consumption matrix indicating resource utilization. A threshold map associated with a subsystem is accessed. The subsystem is responsible for an operation involving files stored in the appliance. The threshold map specifies resources required by the subsystem for the operation and thresholds below which multi-streaming for the operation is allowed. An assessment is made as to whether the operation should be handled by multi-streaming. The assessment includes determining whether the resources are underutilized or overutilized based on the consumption matrix and the threshold map. When the resources are overutilized, multi-streaming is not triggered. When the resources are underutilized, multi-streaming is triggered. Periodic reassessments are made to determine whether the operation should be handled by multi-streaming.

Dynamic and adaptive multi-streaming in deduplication systems

Containers are generated including data containers storing segments of files, segment tree containers storing upper-level segments of segment trees representing the files, and cloud containers storing headers from the data and segment tree containers. A header for a data container includes fingerprints identifying the segments of files. A header for a segment tree container includes fingerprints identifying the upper-level segments. The containers are sent to cloud storage for storage as a cloud unit. The cloud unit is attached to a deduplicated storage appliance by storing at the appliance the segment tree and cloud containers, cloud configuration details, and an index. The cloud configuration details identify the cloud storage having the cloud unit. The index maps the fingerprints to the containers. When a cloud unit is to be detached, the segment tree and cloud containers, and index from the local storage are deleted, but the cloud configuration details are maintained.

Cloud capacity scaling in metadata space constrained deduplication systems

The disclosure provides a system, computer readable medium, and computer-implemented method for managing data access. The method includes obtaining a data access request from a requestor for client data redundantly stored in at least two storage providers that are unknown to the requestor; identifying a service level objective for servicing the data access request; ranking the at least two storage providers based on the service level objective to identify one of the at least two storage providers to service the data access request; and providing the requestor with access to a copy of the client data using the one of the at least two storage providers.

Method to provide SLA based access to cloud data in backup servers with multi cloud storage

Described is a system (and method) for efficient metadata verification when leveraging multi-streams as part of data deduplication system. The system may efficiently perform metadata integrity verification by dynamically invoking multi-streaming to leverage parallelization for metadata verification. Accordingly, the system may better utilize bandwidth and processing capabilities to reduce verification time.

Multistream metadata verification for a deduplication system

Embodiments for performing data recovery from cloud storage to a backup appliance that goes from an offline state to an online state, including identifying super metadata among metadata stored in the cloud storage for the backup appliance, wherein the super metadata comprises an amount on the order of ten percent of the metadata representing a minimum amount of information to reconstruct the metadata, copying the super metadata blocks from the cloud storage to local metadata storage of the backup appliance while it is in the offline state to leave remaining metadata, and copying the remaining metadata blocks from the cloud storage to the local metadata storage while the backup appliance is in the online state.

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Bengaluru, India

Santi Gopal Mondal