Patents by Inventor SHASHWAT SRIVASTAV
SHASHWAT SRIVASTAV has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9858013Abstract: A computer-executable method, computer program product, and system for managing metadata within a distributed data storage system, including a compute node in communication with a data storage array, the computer-executable method, computer program product, and system comprising receiving a data I/O from an application executing within the distributed data storage system, and creating a first storage system within the compute node, wherein the first storage system is enabled to manage metadata related to the data I/O, and processing the data I/O using the first storage system.Type: GrantFiled: June 30, 2014Date of Patent: January 2, 2018Assignee: EMC IP Holding Company LLCInventors: Shashwat Srivastav, Sriram Sankaran, Vishrut Shah, Qi Zhang, Jun Luo, Chen Wang, Huapeng Yuan, Karthik Navaneethakrishnan, Jie Song, Wei Yin
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Patent number: 9734180Abstract: An object storage system having object metadata query capability. Clients can pose queries to the object system in a high-level, declarative language. A query is evaluated against stored object metadata, and only objects satisfying the query's predicates are returned. The object storage system can evaluate alternative logical and physical query plans using a cost model. Queries can be posed using familiar REST-based APIs. The object storage system includes a distributed key-value store for secondary indexing of object metadata. A user can define secondary indexes considering the most common object access patterns.Type: GrantFiled: September 30, 2014Date of Patent: August 15, 2017Assignee: EMC IP HOLDING COMPANY LLCInventors: Stephen G. Graham, Shashwat Srivastav, Sriram Sankaran, Vishrut Shah, Qi Zhang, Jun Luo
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Patent number: 9703768Abstract: An object storage system having object metadata query capability. Clients can pose queries to the object system in a high-level, declarative language. A query is evaluated against stored object metadata, and only objects satisfying the query's predicates are returned. The object storage system can evaluate alternative logical and physical query plans using a cost model. Queries can be posed using familiar REST-based APIs.Type: GrantFiled: September 30, 2014Date of Patent: July 11, 2017Assignee: EMC IP Holding Company LLCInventors: Stephen G. Graham, Shashwat Srivastav
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Publication number: 20170177652Abstract: Structures and processes for garbage collection of search trees under Multi-Version Concurrency Control (MVCC). Such search trees may be used to store data within a distributed storage system. A process detects live search tree elements using tracing and then identify storage chunks having no live elements as garbage to be reclaimed. The process can be paused and resumed to reduce impact on other system processing. To reduce disk fragmentation, a garbage collector may copy pages between chunks prior to reclaiming chunk capacity. Also described is a resource efficient scheduler for a garbage collection.Type: ApplicationFiled: June 27, 2016Publication date: June 22, 2017Inventors: Mikhail Danilov, Mikhail Malygin, Ivan Tchoub, Chen Wang, Shashwat Srivastav, Andrey Fomin
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Publication number: 20170177473Abstract: Systems and methods for determining garbage collection (GC) scope in a distribute storage system using chunk-based storage. The systems and methods are compatible with multi-version concurrency control (MVCC) semantics.Type: ApplicationFiled: June 27, 2016Publication date: June 22, 2017Inventors: Mikhail Danilov, Shashwat Srivastav, Mikhail Malygin, Chen Wang, Ivan Tchoub
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Publication number: 20170161350Abstract: Embodiments of the present invention relate to synchronously replicating data in a distributed computing environment. To achieve synchronous replication both an eventual consistency approach and a strong consistency approach are contemplated. Received data may be written to a log of a primary data store for eventual committal. The data may then be annotated with a record, such as a unique identifier, which facilitates the replay of the data at a secondary data store. Upon receiving an acknowledgment that the secondary data store has written the data to a log, the primary data store may commit the data and communicate an acknowledgment of success back to the client. In a strong consistency approach, the primary data store may wait to send an acknowledgement of success to the client until it receives an acknowledgment that the secondary has not only written, but also committed, the data.Type: ApplicationFiled: December 13, 2016Publication date: June 8, 2017Inventors: Bradley Gene Calder, Niranjan Nilakantan, Shashwat Srivastav, Jiesheng Wu, Abdul Rafay Abbasi, Shane Mainali, Padmanabha Chakravarthy Uddaraju
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Publication number: 20170083549Abstract: Structures and processes for garbage collection of search trees under Multi-Version Concurrency Control (MVCC). Such search trees may be used to store data within a distributed storage system. A process detects live search tree elements using tracing and then identify storage chunks having no live elements as garbage to be reclaimed. The process can be paused and resumed to reduce impact on other system processing.Type: ApplicationFiled: March 29, 2016Publication date: March 23, 2017Inventors: Mikhail Danilov, Mikhail Malygin, Chen Wang, Ivan Tchoub, Shashwat Srivastav, Andrey Fomin, Maxim Trusov
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Patent number: 9558194Abstract: A computer implemented method, computer program product, and system for providing, via a storage provisioning engine, a scalable objects store enabled to store objects across multiple heterogeneous file arrays; wherein file arrays are enabled to be actively added to the object store without pausing the file arrays; and wherein data representing the objects enabled to be balanced across the heterogeneous file arrays based.Type: GrantFiled: May 3, 2013Date of Patent: January 31, 2017Assignee: EMC IP Holding Company LLCInventors: Shashwat Srivastav, Vishrut Shah, Sriram Sankaran, Jun Luo, Fredrick A. Crable, Chen Wang, Huapeng Yuan, Subba R. Gaddamadugu, David A. Gillam, Daquan Zuo, Wei Yin, Brian D. Burck
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Patent number: 9519555Abstract: Embodiments of the present invention relate to synchronously replicating data in a distributed computing environment. To achieve synchronous replication both an eventual consistency approach and a strong consistency approach are contemplated. Received data may be written to a log of a primary data store for eventual committal. The data may then be annotated with a record, such as a unique identifier, which facilitates the replay of the data at a secondary data store. Upon receiving an acknowledgment that the secondary data store has written the data to a log, the primary data store may commit the data and communicate an acknowledgment of success back to the client. In a strong consistency approach, the primary data store may wait to send an acknowledgement of success to the client until it receives an acknowledgment that the secondary has not only written, but also committed, the data.Type: GrantFiled: May 23, 2011Date of Patent: December 13, 2016Assignee: MICROSOFT TECHNOLOGY LICENSING, LLCInventors: Bradley Gene Calder, Niranjan Nilakantan, Shashwat Srivastav, Jiesheng Wu, Abdul Rafay Abbasi, Shane Mainali, Padmanabha Chakravarthy Uddaraju
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Patent number: 9495293Abstract: A computer implemented method, system, and computer program product for enabling consistency between zones comprising creating a lease agreement between a first zone and at least a second zone; wherein the lease indicates that the first zone is the owner of an object; wherein the lease agreement dictates that a notification is to be sent before a cached object in the first zone is updated if the lease is still valid; wherein the lease indicates the first zone is to send a heartbeat to the second zone within the predetermined period of time if the object has not been changed and the lease is still valid; and setting up heartbeats from the first zone to at least a second zone within a predetermined amount of time; wherein the heartbeat indicates that the lease is still valid and the object has not been changed.Type: GrantFiled: June 30, 2014Date of Patent: November 15, 2016Assignee: EMC IP Holding Company, LLCInventors: Shashwat Srivastav, Sriram Sankaran, Subba Gaddamadugu, Peter Musial, Andrew Robertson, Huapeng Yuan, Qi Zhang, Jun Luo, Vishrut Shah, Chen Wang
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Patent number: 9442938Abstract: In one aspect, a method includes using a file system layer configured to interact with a plurality of volumes and enabling an application to interact with any of the plurality of volumes using a single file system format provided by the file system layer. At least two of the plurality of volumes have different file system formats.Type: GrantFiled: September 26, 2013Date of Patent: September 13, 2016Assignee: EMC CorporationInventors: Shashwat Srivastav, Vishrut Shah, Sriram Sankaran, Jun Luo, Chen Wang, Huapeng Yuan, Subba R. Gaddamadugu, Qi Zhang, Wei Yin, Jie Song, Andrew D. Robertson, Peter M. Musial
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Publication number: 20160140202Abstract: Embodiments of the present invention relate to asynchronously replicating data in a distributed computing environment. To achieve asynchronous replication, data received at a primary data store may be annotated with information, such as an identifier of the data. The annotated data may then be communicated to a secondary data store, which may then write the data and annotated information to one or more logs for eventual replay and committal at the secondary data store. The primary data store may communicate an acknowledgment of success in committing the data at the primary data store as well as of success in writing the data to the secondary data store. Additional embodiments may include committing the data at the secondary data store in response to receiving an instruction that authorizes committal of data through an identifier.Type: ApplicationFiled: January 22, 2016Publication date: May 19, 2016Inventors: Bradley Gene Calder, Niranjan Nilakantan, Shashwat Srivastav, Jiesheng Wu, Abdul Rafay Abbasi, Shane Mainali, Padmanabha Chakravarthy Uddaraju
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Patent number: 9336232Abstract: In one aspect, a method includes enabling a REST interface to have access to a volume, receiving a request to allow a native file access to the volume and allowing an application to use a native file interface to have access to the volume while preventing the modifications to the volume through the REST interface if the request is received.Type: GrantFiled: September 26, 2013Date of Patent: May 10, 2016Assignee: EMC CorporationInventors: Shashwat Srivastav, Vishrut Shah, Sriram Sankaran, Jun Luo, Chen Wang, Huapeng Yuan, Subba R. Gaddamadugu, Qi Zhang, Wei Yin, Jie Song, Andrew D. Robertson, Peter M. Musial
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Publication number: 20160070720Abstract: Presented herein are methods of replicating versioned and hierarchical data structures, as well as data structures representing complex transactions. Due to interdependencies between data entities and a lack of guaranteed message ordering, simple replication methods employed for simple data types cannot be used. Operations on data structures exhibit dependencies between the messages making up the operations. This strategy can be extended to various types of complex transactions by considering certain messages to depend on other messages or on the existence of other entries at the data store. Regardless of origin, these dependencies can be enforced by suspending the processing of messages with unsatisfied dependencies until all of its dependencies have been met. Alternately, transactions can be committed immediately, creating entities that include versioned identifiers for each of their dependencies. These entities can then be garbage collected of the parent objects are not subsequently created.Type: ApplicationFiled: July 8, 2015Publication date: March 10, 2016Inventors: BRADLEY GENE CALDER, NIRANJAN NILAKANTAN, SHASHWAT SRIVASTAV, JIESHENG WU, ABDUL RAFAY ABBASI, SHANE MAINALI, PADMANABHA CHAKRAVARTHY UDDARAJU, JU WANG, HEMAL KHATRI, ARILD SKJOLSVOLD, HARSHAWARDHAN GADGIL
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Patent number: 9274906Abstract: Embodiments of the present invention relate to invoking and managing a failover of a storage account between partitions within a distributed computing environment, where each partition represents a key range of data for the storage account. The partitions affected by the failover include source partitions hosted on a primary storage stamp and destination partitions hosted on a secondary storage stamp, where the storage account's data is being actively replicated from the primary to the secondary storage stamp. Upon receiving a manual or automatic indication to perform the failover, configuring the source partitions to independently perform flush-send operations (e.g., distributing pending messages as a group) and then configuring the destination partitions to independently perform flush-replay operations (e.g., aggressively replaying currently pending transactions).Type: GrantFiled: June 9, 2014Date of Patent: March 1, 2016Assignee: Microsoft Technology Licensing, LLCInventors: Bradley Gene Calder, Niranjan Nilakantan, Shashwat Srivastav, Jiesheng Wu, Arild Einar Skjolsvold, Maxim Mazeev, Abdul Rafay Abbasi, Shane Mainali, Hemal Khatri, Ju Wang, Padmanabha Chakravarthy Uddaraju, Leonidas Rigas
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Patent number: 9251021Abstract: Embodiments of the present invention relate to asynchronously replicating data in a distributed computing environment. To achieve asynchronous replication, data received at a primary data store may be annotated with information, such as an identifier of the data. The annotated data may then be communicated to a secondary data store, which may then write the data and annotated information to one or more logs for eventual replay and committal at the secondary data store. The primary data store may communicate an acknowledgment of success in committing the data at the primary data store as well as of success in writing the data to the secondary data store. Additional embodiments may include committing the data at the secondary data store in response to receiving an instruction that authorizes committal of data through a identifier.Type: GrantFiled: May 23, 2011Date of Patent: February 2, 2016Inventors: Bradley Gene Calder, Niranjan Nilakantan, Shashwat Srivastav, Jiesheng Wu, Abdul Rafay Abbasi, Shane Mainali, Padmanabha Chakravarthy Uddaraju
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Patent number: 9223517Abstract: A method, system, and computer program product for providing, via a provisioning engine, a scalable set of indexed key-value pairs enabled to store objects in a data storage environment; wherein the data representing the objects is enabled to be spread across arrays in the data storage environment; wherein additional arrays are enabled to be added to the data storage environment and included in the indexed key-value pairs; wherein the data stored across the arrays may be balanced.Type: GrantFiled: May 3, 2013Date of Patent: December 29, 2015Assignee: EMC CorporationInventors: Shashwat Srivastav, Vishrut Shah, Sriram Sankaran, Jun Luo, Chen Wang, Huapeng Yuan, Subba R. Gaddamadugu, Qi Zhang, Jie Song, Andrew D. Robertson, Peter M. Musial
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Patent number: 9098470Abstract: Presented herein are methods of replicating versioned and hierarchical data structures, as well as data structures representing complex transactions. Due to interdependencies between data entities and a lack of guaranteed message ordering, simple replication methods employed for simple data types cannot be used. Operations on data structures exhibit dependencies between the messages making up the operations. This strategy can be extended to various types of complex transactions by considering certain messages to depend on other messages or on the existence of other entries at the data store. Regardless of origin, these dependencies can be enforced by suspending the processing of messages with unsatisfied dependencies until all of its dependencies have been met. Alternately, transactions can be committed immediately, creating entities that include versioned identifiers for each of their dependencies. These entities can then be garbage collected of the parent objects are not subsequently created.Type: GrantFiled: May 23, 2011Date of Patent: August 4, 2015Assignee: MICROSOFT TECHNOLOGY LICENSING, LLCInventors: Bradley Gene Calder, Niranjan Nilakantan, Shashwat Srivastav, Jiesheng Wu, Abdul Rafay Abbasi, Shane Mainali, Padmanabha Chakravarthy Uddaraju, Ju Wang, Hemal Khatri, Arild Skjolsvold, Harshawardhan Gadgil
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Patent number: 8918362Abstract: Embodiments of the present invention relate to systems, methods, and computer storage media for replicating data in a distributed computing environment utilizing a combination of replication methodologies. A full-object replication may be utilized to replicate a full state of an object from a primary data store to a secondary data store. A checkpoint created after initiating the full-object replication may be parsed to identify changes to the object that have been entered since initiating the full-object replication. This replication process is referred to as a delta-checkpoint replication methodology. Additionally, in an embodiment, a log-based replication methodology may be utilized. The log-based replication may communicate data from a log of the primary data store to the secondary data store. It is also contemplated in an exemplary embodiment that when the log-based replication fails to maintain a throughput threshold, one of the other replication methodologies may be initiated, at least temporarily.Type: GrantFiled: May 23, 2011Date of Patent: December 23, 2014Assignee: Microsoft CorporationInventors: Bradley Gene Calder, Niranjan Nilakantan, Shashwat Srivastav, Jiesheng Wu, Abdul Rafay Abbasi, Shane Mainali, Padmanabha Chakravarthy Uddaraju
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Patent number: 8886796Abstract: Embodiments of the present invention relate to invoking and managing load-balancing operation(s) applied to partitions within a distributed computing environment, where each partition represents a key range of data for a storage account. The partitions affected by the load-balancing operation(s) are source partitions hosted on a primary storage stamp and/or destination partitions hosted on a secondary storage stamp, where the primary and secondary storage stamps are located in geographically distinct areas and are equipped to replicate the storage account's data therebetween. The load-balancing operation(s) include splitting partitions into child partitions upon detecting an increased workload as a result of active replication, merging partitions to form parent partitions upon detecting a reduction in workload as a result of decreased processing-related resource consumption, or offloading partitions based on resource consumption.Type: GrantFiled: May 23, 2011Date of Patent: November 11, 2014Assignee: Microsoft CorporationInventors: Bradley Gene Calder, Niranjan Nilakantan, Shashwat Srivastav, Jiesheng Wu, Abdul Rafay Abbasi, Shane Mainali, Padmanabha Chakravarthy Uddaraju, Arild Einar Skjolsvold, Hemal Khatri, Ju Wang