Emc IP Holding Company LLC

Swaroop Shankar Dh

Chetan Battal

Mahantesh M Ambaljeri

Mahesh Reddy A V

Mahesh Reddy Appireddygari Venkataramana

Deepthi Urs

Shelesh Chopra

Sunil Kumar Yadav

Gururaj Reddy Kulkarni

Tushar Dethe

Asif Khan

Aneesh Kumar Gurindapalli

Chandrakantha T Nagaraja

Mahesh Reddy Av

Battal Chetan

Methods and systems for restoring data are described. According to some embodiments, the method, in response to receiving a first restore request, initiates a second restore request to a hybrid data buffer to route blocks of backup data to the hybrid data buffer. The method further invokes an interrupt service routine (ISR) that is initialized with reserved addresses. When the blocks of backup data are transmitted to the hybrid data buffer, the method further tags, by the ISR, the blocks of backup data to a specified location, where the specified location is one of the reserved addresses.

Uninterrupted block-based restore operation using a read-ahead buffer

Embodiments are described for performing an uninterrupted backup in a storage system responsive to an abort event. A backup agent receives a plurality of file objects to be backed up on a target device during a first backup session. The backup agent initiates a parent interrupt service routine (ISR), which generates a plurality of child ISRs. Each of the plurality of child ISRs monitors a backup state of a corresponding file object. The parent ISR generates a virtual file object queue (VFOQ) to store a current backup state of each of the plurality of file objects. When an abort occurs, the current backup state of each of the plurality of file objects is saved in a respective child ISR of that file object. During a subsequent backup session, backup of the plurality of file objects commences based on the current backup state of each of the plurality of file objects.

Uninterrupted file level backup operation using a virtual object file queue

Methods and systems for file level prioritization during a data restore operation are disclosed. According to some embodiments, in response to a restore request to restore one or more files and for each file, the method includes retrieving file information and a critical value associated with the file, and calculating a Euclidean distance of the file to a consecutive file based on the critical value. The method further includes sorting the file(s) based on the calculated Euclidean distance of each file. The method further includes restoring the sorted file(s) at a target site.

Systems and methods for file level prioritization during multi-object data restores

Methods and systems for block-level data prioritization during a backup operation are disclosed. According to some embodiments, the method includes extracting a backup data criticality from header information of one or more data blocks. The method further includes based on the extracted backup data criticality, assigning a weighted value corresponding to the backup data criticality. The method further includes for each data block, calculating a Euclidean distance of the data block to a consecutive data block using the weighted value.

Systems and methods to achieve effective streaming of data blocks in data backups

Methods and systems for restoring data to a host device are described. According to some embodiments, a hybrid buffer may be used to generate a twin file of each file object to be restored and append the twin file to the corresponding file object. Each file object and its corresponding twin file may be transmitted to a construction container via a restore agent. In the event of an unexpected abort during the first restoration session, the restore agent may preserve the twin file of a file object currently being restored (if one has been created at the time of the abort) and instruct the hybrid buffer to terminate operation. During a subsequent restore session, the restore agent may poll for the preserved twin file and commence the data restore operation from the file object currently being restored using the twin file.

Uninterrupted file level restore service using siamese engine

An apparatus for performing backup operations for data packets by a backup agent is provided. The apparatus predicts a first backup time period of completing a first backup operation for the data packets and determines a second backup time period of performing the first backup operation until the first backup operation is stopped at a point of time. The apparatus also identifies an incomplete status of the first backup operation at the point of time based on a comparison between the first backup time period and the second backup time period, and collects information describing the incomplete status. The apparatus further starts a second backup operation for the data packets from the incomplete status based on the information.

Uninterrupted backup operation using a time based approach

In general, embodiments of the invention relate to processing backup jobs. The processing of backup jobs includes ordering a first plurality of jobs in a priority queue, where the first plurality of jobs is associated with a first workflow, ordering a second plurality of jobs in the priority queue, where the second plurality of jobs is associated with a second workflow, where the first workflow is associated with a higher weight than the second workflow, where the first plurality of jobs is scheduled to be serviced before the second plurality of jobs, and initiating servicing of the first plurality of jobs.

System and method for sorting and scheduling workflows

Methods and systems for restoring data from a target device are described. According to some embodiments, the method receives a first set of data packets for restore, where the first set of data packets includes a multiplicity of data chunks. The method further captures footprints of the first set of data packets in a cache disk array. In response to receiving an acknowledgement from the cache disk array indicating the footprints of the first set of data packets have been captured, the method pushes each data chunk of the first set of data packets to a construction container for reconstruction of backup data. In response to receiving an acknowledgement from the construction container indicating the data chunk is successfully pushed, the method flushes the respective footprint of the data chunk from the cache disk array.

Stream level uninterrupted restore operation using data probe

A method for performing a backup operation includes obtaining a restoration request, and in response to the restoration request: identifying a first set of backups, wherein each backup in the first set of backups is associated with requested data, mounting the first set of backups from the backup storage system, performing data mining on the first set of backups to obtain a hierarchical structure, providing a set of options to a client based on the hierarchical structure, obtaining a selection from the client, wherein the selection is a portion of the set of options, obtaining selected content based on the selection, wherein the selected content is in a source format, converting the selected content from a source format to a target format to obtain target formatted user-specified content, and initiating a transfer of the target-formatted user-specified content to a cloud-based service.

System and method for a restoration of on-premise backups to a cloud-based service

An apparatus for performing restore operations for data packets by a restore agent is provided. The apparatus predicts a first time period of completing a first restore operation for the data packets and determines a second time period of performing the first restore operation until the first restore operation is stopped at a point of time. The apparatus also identifies an incomplete status of the first restore operation at the point of time based on a comparison between the first time period and the second time period, and collects information describing the incomplete status. The apparatus further starts a second restore operation for the data packets from the incomplete status based on the information.

Uninterrupted restore operation using a time based approach

Methods and systems for backing up data to a target device are described. According to some embodiments, the method receives a first set of data packets for backup, where the first set of data packets includes a multiplicity of data chunks. The method further captures footprints of the first set of data packets in a cache disk array. In response to receiving an acknowledgement from the cache disk array indicating the footprints have been captured, the method further initiates a write operation to write each data chunk of the first set of data packets to the target device. In response to receiving an acknowledgement indicating the data chunk is successfully written, the method further flushes the respective footprint of the data chunk from the cache disk array.

Stream level uninterrupted backup operation using data probe

Embodiments are described for performing an uninterrupted backup in a storage system in view of one or more abort events. A backup agent receives writes one or more data blocks to a write latch. A parent interrupt service routine (ISR) polls for abort events. In response to an abort event, an intermediate interrupt is generated that spawns a child processes for each process of the backup. The intermediate ISR logs each child ISR, the process it is responsible for, and the intermediate interrupt, for later restoration of the backup state. After a recovery of the above event, then each child ISR can be called to restore its state. After restoring the state, the backup agent resumes the backup from where the abort event was detected. The child ISRs are re-entrant. If another abort event is detected, the backup state can again be saved and later resumed from that state.

Stream level uninterrupted backup operation using an interrupt service routine approach

A backup agent for generating backups includes a persistent storage and a backup manager. The persistent storage stores backup/restoration policies. The backup manager obtains production host computing resource characteristics associated with production hosts; performs a computing resource analysis of the production host computing resource characteristics to obtain resource profiles for each of the production hosts; performs an availability analysis of the obtained resource profiles to determine an application-level computing resources distribution for generating the backups; coordinates generating the backups using the application-level computing resource distribution and the backup/restoration policies to obtain the backups; and stores the obtained backups in backup storage.

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Bengaluru, India

Swaroop Shankar Dh