Patents by Inventor Yuanyang Wu
Yuanyang Wu 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: 11662937Abstract: Techniques for replicating data involve: determining overwritten probabilities of a plurality of data blocks of a source storage device. The techniques further involve: classifying the plurality of data blocks as cold data blocks or hot data blocks based on the overwritten probabilities in the plurality of data blocks. The techniques further involve: replicating at least a portion of the cold data blocks to a target storage device prior to the hot data blocks. Accordingly, transmission resources used to re-replicate overwritten data during an initial replication period can be reduced, thereby achieving efficient data replication.Type: GrantFiled: November 4, 2021Date of Patent: May 30, 2023Assignee: EMC IP Holding Company LLPInventors: Yuanyang Wu, Yifeng Lu
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Patent number: 11507599Abstract: Embodiments of the present disclosure provide a method, a computer program product and apparatus for processing transactions in a synchronized replication system, wherein the method comprises, at a source site in the synchronized replication system: serializing commits of transactions in the synchronized replication system so that only one of the transactions can be committed at the same time; in response to initiating the commit of the one transaction, generating a log for each of transactions that are ongoing in the synchronized replication system, so as to record impact of all operations of a respective transaction on the synchronized replication system; marking transactions for which the logs have been generated; and completing commits of the marked transactions.Type: GrantFiled: December 16, 2015Date of Patent: November 22, 2022Assignee: EMC IP Holding Company LLCInventors: Ning Xu, Alex Minghui Zhang, Brian Tianfang Xiong, Yuanyang Wu, Yifeng Lu
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Publication number: 20220334724Abstract: Techniques for replicating data involve: determining overwritten probabilities of a plurality of data blocks of a source storage device. The techniques further involve: classifying the plurality of data blocks as cold data blocks or hot data blocks based on the overwritten probabilities in the plurality of data blocks. The techniques further involve: replicating at least a portion of the cold data blocks to a target storage device prior to the hot data blocks. Accordingly, transmission resources used to re-replicate overwritten data during an initial replication period can be reduced, thereby achieving efficient data replication.Type: ApplicationFiled: November 4, 2021Publication date: October 20, 2022Inventors: Yuanyang Wu, Yifeng Lu
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Patent number: 10901630Abstract: To monitor data duplication progress, embodiments of the present disclosure relate to a method and apparatus for determining data duplication progress in real-time. The method comprises initiating a duplication of data from a source system to a destination system. The method further comprises determining first duplication progress for an initial stage of the duplication, original data existing on the source system when the duplication is initiated being duplicated in the initial stage. Furthermore, the method further comprises determining, independently from the initial stage, second duplication progress for a delta stage of the duplication, delta data being duplicated in the delta stage and including at least data generated during the initial stage. The present disclosure develops a fine-grained monitoring mechanism of data duplication progress.Type: GrantFiled: April 17, 2018Date of Patent: January 26, 2021Assignee: EMC IP Holding Company LLCInventors: Yuan Luo, Ning Xu, Frank Yuanyang Wu, Qiu Shang, Mark Yue Qian
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Patent number: 10795601Abstract: Embodiments of the present disclosure provide a method and device for a storage system. The method may include: replicating, through a first replication process, data in a first storage device to a second storage device to obtain a data replica; replicating, through a second replication process, metadata of the data to the second storage device to obtain a first metadata replica; replicating, in the second storage device through a third replication process, the first metadata replica to obtain a second metadata replica; and performing data recovery based on the data replica and the second metadata replica.Type: GrantFiled: December 20, 2016Date of Patent: October 6, 2020Assignee: EMC IP Holding Company LLCInventors: Sherry Hongru Xu, Brian Tianfang Xiong, Yuanyang Wu, Yifeng Lu, Alex Minghui Zhang
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Patent number: 10789214Abstract: Embodiments of the present disclosure provide a computer program product, a system and a method for providing access to storage resources by receiving a user selection of one or more of a plurality of source storage resources; establishing corresponding backup storage resources for the selected one or more source storage resources.Type: GrantFiled: December 16, 2015Date of Patent: September 29, 2020Assignee: EMC IP Holding Company LLCInventors: Yifeng Lu, Yuanyang Wu, Brian Tianfang Xiong, Luna Yue Kuang, Alex Minghui Zhang
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Patent number: 10616326Abstract: Embodiments of the present disclosure relate to a method, a computer program products and apparatus for controlling sharing of a resource among a plurality of nodes, wherein in response to a service using the resource to be initiated at an object node of the plurality of nodes, locking, at the object node, an object file that is associated with use of the resource; in response to successful locking of the object file, determining, at the object node, whether other files associated with the use of the resource at other nodes of the plurality of nodes have been locked; and in response to determining that the other files are not locked, using, at the object node, the resource to initiate the service.Type: GrantFiled: December 14, 2015Date of Patent: April 7, 2020Assignee: EMC IP Holding Company LLCInventors: Sherry Hongru Xu, Brian Tianfang Xiong, Yuanyang Wu, Ning Xu, Yuan Luo
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Patent number: 10318207Abstract: Systems and methods for managing data replication between data storage resources with differing capabilities. A system can check whether capabilities of a primary data storage system are different from capabilities of a secondary data storage system. Such checking can be performed based on a release version of each of the primary and secondary data storage systems. If the capabilities of the respective data storage systems are determined to be different, then the system can make a determination as to whether or not the difference can be rectified. If the difference can be rectified, such as by enabling/disabling certain features of the primary and/or secondary data storage system, then the system can perform such a rectification and proceed with provisioning of data to be replicated. If the difference cannot be rectified, then the system can prevent the provisioning of the data and notify an administrator of the data storage systems.Type: GrantFiled: April 27, 2017Date of Patent: June 11, 2019Assignee: EMC IP Holding Company LLCInventors: Vasu Subramanian, Qi Qu, Zheng He, Yuanyang Wu
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Patent number: 10235073Abstract: Embodiments are directed to techniques for enforcing prerequisite conditions on a data object for an operational feature both upon initiation of that operational feature and while that operational feature is maintained. Accordingly, improved techniques enforce conditions by setting a flag associated with a data object upon confirming that the conditions have been met and checking the flag anytime a configuration change to the data object is requested that would cause the conditions to be violated. If the flag is set, any configuration change that would cause the conditions to be violated is rejected.Type: GrantFiled: September 22, 2016Date of Patent: March 19, 2019Assignee: EMC IP Holding Company LLCInventors: Tianfang Xiong, Hongru Xu, Yuanyang Wu, Ruisong Wang, He Wang
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Patent number: 10152250Abstract: Replication techniques may include creating a first file pool on a first site where storage for the first pool is provisioned from a first storage device group configured as a first consistency group; creating a second file pool on a second site where storage for the second file pool is provisioned from a second storage device group configured as a second consistency group; creating a first file system and its first snapshot in the first file pool of the first site, where creating the first file system and its first snapshot include performing first modifications to the first file pool; applying the first modifications to the first consistency group; and replicating the first modifications on the second file pool. Replicating may include applying the first modifications to the second consistency group to replicate the first file system and its first snapshot on the second site.Type: GrantFiled: September 27, 2016Date of Patent: December 11, 2018Assignee: EMC IP Holding Company LLCInventors: Tianfang Xiong, Yuanyang Wu, Yifeng Lu, Minghui Zhang, Hongru Xu
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Patent number: 10152230Abstract: Replication techniques for file-based replication. A first file pool and a second pool may be created, respectively, on a first site and a second site. Storage for the first file pool may be provisioned from a first storage device group configured as a first consistency group. Storage for the second file pool may be provisioned from a second storage device group configured as a second consistency group. Modification operations, such as writes, may be applied to the first file pool. The modifications performed on the first file pool result in corresponding modifications to the first consistency group. The modifications may be replicated on the second file pool by applying the modifications to the second consistency group. File systems created in the first and second file pools may be self-contained and modifications applied to the first and second consistency groups may be applied in a specified order to ensure write consistency.Type: GrantFiled: September 27, 2016Date of Patent: December 11, 2018Assignee: EMC IP Holding Company LLCInventors: Tianfang Xiong, Yuanyang Wu, Yifeng Lu, Minghui Zhang, Hongru Xu
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Patent number: 10146649Abstract: A technique handles a VDM failover situation. The technique involves adjusting a configuration file on a first platform to indicate whether data managed by an initial VDM on that platform is being replicated to a second platform. The technique further involves, following a VDM failover event, creating a replacement VDM on the first platform to replace the initial VDM. The technique further involves, after the replacement VDM is created, performing an operation that controls interfaces provided by the replacement VDM. The operation enables the interfaces when the operation determines that the data managed by the initial VDM on the first platform was not being replicated to the second platform at the time of the event, and disables the interfaces when the operation determines that the data managed by the initial VDM on the first platform was being replicated to the second platform at that time of the event.Type: GrantFiled: September 26, 2017Date of Patent: December 4, 2018Assignee: EMC IP Holding Company LLCInventors: Minghui Zhang, Tianfang Xiong, Yuanyang Wu, Yifeng Lu, Hongru Xu
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Publication number: 20180300070Abstract: To monitor data duplication progress, embodiments of the present disclosure relate to a method and apparatus for determining data duplication progress in real-time. The method comprises initiating a duplication of data from a source system to a destination system. The method further comprises determining first duplication progress for an initial stage of the duplication, original data existing on the source system when the duplication is initiated being duplicated in the initial stage. Furthermore, the method further comprises determining, independently from the initial stage, second duplication progress for a delta stage of the duplication, delta data being duplicated in the delta stage and including at least data generated during the initial stage. The present disclosure develops a fine-grained monitoring mechanism of data duplication progress.Type: ApplicationFiled: April 17, 2018Publication date: October 18, 2018Inventors: Yuan Luo, Ning Xu, Frank Yuanyang Wu, Qiu Shang, Mark Yue Qian
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Patent number: 10007567Abstract: There is provided a method and device for recovering data replication between storage devices. The method comprises: creating mirrored pairs between logical units of a primary storage device and logical units of a secondary storage device; in response to the primary storage device recovering from an interruption state to a normal state, re-creating the mirrored pairs based on one or more replication sessions between the logical units of the primary storage device and the logical units of the secondary storage device stored before interruption; and replicating data to the primary storage device based on the re-created mirrored pairs.Type: GrantFiled: December 23, 2016Date of Patent: June 26, 2018Assignee: EMC IP Holding Company LLCInventors: Alex Minghui Zhang, Brian Tianfang Xiong, Yuanyang Wu, Yifeng Lu, Sherry Hongru Xu
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Publication number: 20180095851Abstract: A technique handles a VDM failover situation. The technique involves adjusting a configuration file on a first platform to indicate whether data managed by an initial VDM on that platform is being replicated to a second platform. The technique further involves, following a VDM failover event, creating a replacement VDM on the first platform to replace the initial VDM. The technique further involves, after the replacement VDM is created, performing an operation that controls interfaces provided by the replacement VDM. The operation enables the interfaces when the operation determines that the data managed by the initial VDM on the first platform was not being replicated to the second platform at the time of the event, and disables the interfaces when the operation determines that the data managed by the initial VDM on the first platform was being replicated to the second platform at that time of the event.Type: ApplicationFiled: September 26, 2017Publication date: April 5, 2018Inventors: Minghui Zhang, Tianfang Xiong, Yuanyang Wu, Yifeng Lu, Hongru Xu
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Publication number: 20170192703Abstract: There is provided a method and device for recovering data replication between storage devices. The method comprises: creating mirrored pairs between logical units of a primary storage device and logical units of a secondary storage device; in response to the primary storage device recovering from an interruption state to a normal state, re-creating the mirrored pairs based on one or more replication sessions between the logical units of the primary storage device and the logical units of the secondary storage device stored before interruption; and replicating data to the primary storage device based on the re-created mirrored pairs.Type: ApplicationFiled: December 23, 2016Publication date: July 6, 2017Inventors: Alex Minghui Zhang, Brian Tianfang Xiong, Yuanyang Wu, Yifeng Lu, Sherry Hongru Xu
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Publication number: 20170185309Abstract: Embodiments of the present disclosure provide a method and device for a storage system. The method may include: replicating, through a first replication process, data in a first storage device to a second storage device to obtain a data replica; replicating, through a second replication process, metadata of the data to the second storage device to obtain a first metadata replica; replicating, in the second storage device through a third replication process, the first metadata replica to obtain a second metadata replica; and performing data recovery based on the data replica and the second metadata replica.Type: ApplicationFiled: December 20, 2016Publication date: June 29, 2017Inventors: Sherry Hongru Xu, Brian Tianfang Xiong, Yuanyang Wu, Yifeng Lu, Alex Minghui Zhang
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Publication number: 20170090806Abstract: Embodiments are directed to techniques for enforcing prerequisite conditions on a data object for an operational feature both upon initiation of that operational feature and while that operational feature is maintained. Accordingly, improved techniques enforce conditions by setting a flag associated with a data object upon confirming that the conditions have been met and checking the flag anytime a configuration change to the data object is requested that would cause the conditions to be violated. If the flag is set, any configuration change that would cause the conditions to be violated is rejected.Type: ApplicationFiled: September 22, 2016Publication date: March 30, 2017Inventors: Tianfang Xiong, Hongru Xu, Yuanyang Wu, Ruisong Wang, He Wang
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Publication number: 20160196322Abstract: Embodiments of the present disclosure provide a method, a computer program product and apparatus for processing transactions in a synchronized replication system, wherein the method comprises, at a source site in the synchronized replication system: serializing commits of transactions in the synchronized replication system so that only one of the transactions can be committed at the same time; in response to initiating the commit of the one transaction, generating a log for each of transactions that are ongoing in the synchronized replication system, so as to record impact of all operations of a respective transaction on the synchronized replication system; marking transactions for which the logs have been generated; and completing commits of the marked transactions.Type: ApplicationFiled: December 16, 2015Publication date: July 7, 2016Inventors: Ning Xu, Alex Minghui Zhang, Brian Tianfang Xiong, Yuanyang Wu, Yifeng Lu
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Publication number: 20160196183Abstract: Embodiments of the present disclosure provide a computer program product, a system and a method for providing access to storage resources by receiving a user selection of one or more of a plurality of source storage resources; establishing corresponding backup storage resources for the selected one or more source storage resources.Type: ApplicationFiled: December 16, 2015Publication date: July 7, 2016Inventors: Yifeng Lu, Yuanyang Wu, Brian Tianfang Xiong, Luna Yue Kuang, Alex Minghui Zhang