Patents by Inventor Santosh Ananth Rao
Santosh Ananth Rao 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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Publication number: 20240126470Abstract: One or more techniques and/or computing devices are provided for synchronous replication. For example, synchronous replication relationships are established between a first storage object (e.g., a file, a logical unit number (LUN), a consistency group, etc.), hosted by a first storage controller, and a plurality of replication storage objects hosted by other storage controllers. In this way, a write operation to the first storage object is implemented in parallel upon the first storage object and the replication storage objects in a synchronous manner, such as using a zero-copy operation to reduce overhead otherwise introduced by performing copy operations. Reconciliation is performed in response to a failure so that the first storage object and the replication storage objects comprise consistent data. Failed write operations and replication write operations are retried, while enforcing a single write semantic.Type: ApplicationFiled: August 11, 2023Publication date: April 18, 2024Inventors: Michael Robin Eisler, Santosh Ananth Rao, Akhil Kaushik, Yuedong Mu
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Publication number: 20240080362Abstract: A storage area network (SAN)-attached storage system architecture is disclosed. The storage system provides strongly consistent distributed storage communication protocol semantics, such as SCSI target semantics. The system includes a mechanism for presenting a single distributed logical unit, comprising one or more logical sub-units, as a single logical unit of storage to a host system by associating each of the logical sub-units that make up the single distributed logical unit with a single host visible identifier that corresponds to the single distributed logical unit. The system further includes mechanisms to maintain consistent context information for each of the logical sub-units such that the logical sub-units are not visible to a host system as separate entities from the single distributed logical unit.Type: ApplicationFiled: November 13, 2023Publication date: March 7, 2024Inventors: Santosh Ananth Rao, Geoffrey Stewart Brown, Srikumar Natarajan, Pranab Patnaik, Kai Tan, Peter Frank Corbett, Vivek Venkatesan
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Patent number: 11818212Abstract: A storage area network (SAN)-attached storage system architecture is disclosed. The storage system provides strongly consistent distributed storage communication protocol semantics, such as SCSI target semantics. The system includes a mechanism for presenting a single distributed logical unit, comprising one or more logical sub-units, as a single logical unit of storage to a host system by associating each of the logical sub-units that make up the single distributed logical unit with a single host visible identifier that corresponds to the single distributed logical unit. The system further includes mechanisms to maintain consistent context information for each of the logical sub-units such that the logical sub-units are not visible to a host system as separate entities from the single distributed logical unit.Type: GrantFiled: October 29, 2020Date of Patent: November 14, 2023Assignee: NetApp, Inc.Inventors: Santosh Ananth Rao, Geoffrey Stewart Brown, Srikumar Natarajan, Pranab Patnaik, Kai Tan, Peter Frank Corbett, Vivek Venkatesan
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Patent number: 11726697Abstract: One or more techniques and/or computing devices are provided for synchronous replication. For example, synchronous replication relationships are established between a first storage object (e.g., a file, a logical unit number (LUN), a consistency group, etc.), hosted by a first storage controller, and a plurality of replication storage objects hosted by other storage controllers. In this way, a write operation to the first storage object is implemented in parallel upon the first storage object and the replication storage objects in a synchronous manner, such as using a zero-copy operation to reduce overhead otherwise introduced by performing copy operations. Reconciliation is performed in response to a failure so that the first storage object and the replication storage objects comprise consistent data. Failed write operations and replication write operations are retried, while enforcing a single write semantic.Type: GrantFiled: February 28, 2022Date of Patent: August 15, 2023Assignee: NetApp, Inc.Inventors: Michael Robin Eisler, Santosh Ananth Rao, Akhil Kaushik, Yuedong Mu
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Publication number: 20220187993Abstract: One or more techniques and/or computing devices are provided for synchronous replication. For example, synchronous replication relationships are established between a first storage object (e.g., a file, a logical unit number (LUN), a consistency group, etc.), hosted by a first storage controller, and a plurality of replication storage objects hosted by other storage controllers. In this way, a write operation to the first storage object is implemented in parallel upon the first storage object and the replication storage objects in a synchronous manner, such as using a zero-copy operation to reduce overhead otherwise introduced by performing copy operations. Reconciliation is performed in response to a failure so that the first storage object and the replication storage objects comprise consistent data. Failed write operations and replication write operations are retried, while enforcing a single write semantic.Type: ApplicationFiled: February 28, 2022Publication date: June 16, 2022Inventors: Michael Robin Eisler, Santosh Ananth Rao, Akhil Kaushik, Yuedong Mu
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Patent number: 11262931Abstract: One or more techniques and/or computing devices are provided for synchronous replication. For example, synchronous replication relationships are established between a first storage object (e.g., a file, a logical unit number (LUN), a consistency group, etc.), hosted by a first storage controller, and a plurality of replication storage objects hosted by other storage controllers. In this way, a write operation to the first storage object is implemented in parallel upon the first storage object and the replication storage objects in a synchronous manner, such as using a zero-copy operation to reduce overhead otherwise introduced by performing copy operations. Reconciliation is performed in response to a failure so that the first storage object and the replication storage objects comprise consistent data. Failed write operations and replication write operations are retried, while enforcing a single write semantic.Type: GrantFiled: November 14, 2019Date of Patent: March 1, 2022Assignee: NetApp, Inc.Inventors: Michael Robin Eisler, Santosh Ananth Rao, Akhil Kaushik, Yuedong Mu
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Publication number: 20210044656Abstract: A storage area network (SAN)-attached storage system architecture is disclosed. The storage system provides strongly consistent distributed storage communication protocol semantics, such as SCSI target semantics. The system includes a mechanism for presenting a single distributed logical unit, comprising one or more logical sub-units, as a single logical unit of storage to a host system by associating each of the logical sub-units that make up the single distributed logical unit with a single host visible identifier that corresponds to the single distributed logical unit. The system further includes mechanisms to maintain consistent context information for each of the logical sub-units such that the logical sub-units are not visible to a host system as separate entities from the single distributed logical unit.Type: ApplicationFiled: October 29, 2020Publication date: February 11, 2021Inventors: Santosh Ananth Rao, Geoffrey Stewart Brown, Srikumar Natarajan, Pranab Patnaik, Kai Tan, Peter Frank Corbett, Vivek Venkatesan
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Patent number: 10901958Abstract: Methods and systems for a distributed database cluster storing a plurality of replicas of a databases are provided. One method includes locating by a processor, a timestamp of a last stored record in a backup copy of the database from a plurality of logical partitions for a point in time restore operation; identifying by the processor, an operation log for each logical partition with the last stored record, the operation log providing transaction details associated with the database; splitting by the processor, the operation log for each logical partition by ignoring transactions that occurred prior to the timestamp of the last stored record; and using by the processor, the split operation log for restoring the database to the point in time.Type: GrantFiled: April 27, 2018Date of Patent: January 26, 2021Assignee: NETAPP, INC.Inventors: Amarnath Rachapudi, Atish Kathpal, Vineeth Karinta, Karthikeyan Nagalingam, Santosh Ananth Rao
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Patent number: 10862966Abstract: A storage area network (SAN)-attached storage system architecture is disclosed. The storage system provides strongly consistent distributed storage communication protocol semantics, such as SCSI target semantics. The system includes a mechanism for presenting a single distributed logical unit, comprising one or more logical sub-units, as a single logical unit of storage to a host system by associating each of the logical sub-units that make up the single distributed logical unit with a single host visible identifier that corresponds to the single distributed logical unit. The system further includes mechanisms to maintain consistent context information for each of the logical sub-units such that the logical sub-units are not visible to a host system as separate entities from the single distributed logical unit.Type: GrantFiled: November 13, 2018Date of Patent: December 8, 2020Assignee: NetApp Inc.Inventors: Santosh Ananth Rao, Geoffrey Stewart Brown, Srikumar Natarajan, Pranab Patnaik, Kai Tan, Peter Frank Corbett, Vivek Venkatesan
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Publication number: 20200081625Abstract: One or more techniques and/or computing devices are provided for synchronous replication. For example, synchronous replication relationships are established between a first storage object (e.g., a file, a logical unit number (LUN), a consistency group, etc.), hosted by a first storage controller, and a plurality of replication storage objects hosted by other storage controllers. In this way, a write operation to the first storage object is implemented in parallel upon the first storage object and the replication storage objects in a synchronous manner, such as using a zero-copy operation to reduce overhead otherwise introduced by performing copy operations. Reconciliation is performed in response to a failure so that the first storage object and the replication storage objects comprise consistent data. Failed write operations and replication write operations are retried, while enforcing a single write semantic.Type: ApplicationFiled: November 14, 2019Publication date: March 12, 2020Inventors: Michael Robin Eisler, Santosh Ananth Rao, Akhil Kaushik, Yuedong Mu
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Patent number: 10496320Abstract: One or more techniques and/or computing devices are provided for synchronous replication. For example, synchronous replication relationships are established between a first storage object (e.g., a file, a logical unit number (LUN), a consistency group, etc.), hosted by a first storage controller, and a plurality of replication storage objects hosted by other storage controllers. In this way, a write operation to the first storage object is implemented in parallel upon the first storage object and the replication storage objects in a synchronous manner, such as using a zero-copy operation to reduce overhead otherwise introduced by performing copy operations. Reconciliation is performed in response to a failure so that the first storage object and the replication storage objects comprise consistent data. Failed write operations and replication write operations are retried, while enforcing a single write semantic.Type: GrantFiled: December 28, 2015Date of Patent: December 3, 2019Assignee: NetApp Inc.Inventors: Michael Robin Eisler, Santosh Ananth Rao, Akhil Kaushik, Yuedong Mu
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Publication number: 20190332692Abstract: Methods and systems for a distributed database cluster storing a plurality of replicas of a databases are provided. One method includes locating by a processor, a timestamp of a last stored record in a backup copy of the database from a plurality of logical partitions for a point in time restore operation; identifying by the processor, an operation log for each logical partition with the last stored record, the operation log providing transaction details associated with the database; splitting by the processor, the operation log for each logical partition by ignoring transactions that occurred prior to the timestamp of the last stored record; and using by the processor, the split operation log for restoring the database to the point in time.Type: ApplicationFiled: April 27, 2018Publication date: October 31, 2019Applicant: NETAPP, INC.Inventors: Amarnath Rachapudi, Atish Kathpal, Vineeth Karinta, Karthikeyan Nagalingam, Santosh Ananth Rao
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Publication number: 20190082013Abstract: A storage area network (SAN)-attached storage system architecture is disclosed. The storage system provides strongly consistent distributed storage communication protocol semantics, such as SCSI target semantics. The system includes a mechanism for presenting a single distributed logical unit, comprising one or more logical sub-units, as a single logical unit of storage to a host system by associating each of the logical sub-units that make up the single distributed logical unit with a single host visible identifier that corresponds to the single distributed logical unit. The system further includes mechanisms to maintain consistent context information for each of the logical sub-units such that the logical sub-units are not visible to a host system as separate entities from the single distributed logical unit.Type: ApplicationFiled: November 13, 2018Publication date: March 14, 2019Inventors: Santosh Ananth Rao, Geoffrey Stewart Brown, Srikumar Natarajan, Pranab Patnaik, Kai Tan, Peter Frank Corbett, Vivek Venkatesan
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Publication number: 20170185306Abstract: One or more techniques and/or computing devices are provided for synchronous replication. For example, synchronous replication relationships are established between a first storage object (e.g., a file, a logical unit number (LUN), a consistency group, etc.), hosted by a first storage controller, and a plurality of replication storage objects hosted by other storage controllers. In this way, a write operation to the first storage object is implemented in parallel upon the first storage object and the replication storage objects in a synchronous manner, such as using a zero-copy operation to reduce overhead otherwise introduced by performing copy operations. Reconciliation is performed in response to a failure so that the first storage object and the replication storage objects comprise consistent data. Failed write operations and replication write operations are retried, while enforcing a single write semantic.Type: ApplicationFiled: December 28, 2015Publication date: June 29, 2017Inventors: Michael Robin Eisler, Santosh Ananth Rao, Akhil Kaushik, Yuedong Mu
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Publication number: 20160119427Abstract: A storage area network (SAN)-attached storage system architecture is disclosed. The storage system provides strongly consistent distributed storage communication protocol semantics, such as SCSI target semantics. The system includes a mechanism for presenting a single distributed logical unit, comprising one or more logical sub-units, as a single logical unit of storage to a host system by associating each of the logical sub-units that make up the single distributed logical unit with a single host visible identifier that corresponds to the single distributed logical unit. The system further includes mechanisms to maintain consistent context information for each of the logical sub-units such that the logical sub-units are not visible to a host system as separate entities from the single distributed logical unit.Type: ApplicationFiled: October 20, 2015Publication date: April 28, 2016Applicant: NETAPP, INC.Inventors: Santosh Ananth Rao, Geoffrey Stewart Brown, Srikumar Natarajan, Pranab Patnaik, Kai Tan, Peter Frank Corbett, Vivek Venkatesan
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Patent number: 8209443Abstract: A system and method for identifying lost/stale peripheral hardware devices connected to an enterprise computer system is disclosed. In one embodiment, a method for identifying lost peripheral hardware devices connected to an enterprise computer system includes initializing system memory by obtaining data structures associated with last detected connected peripheral hardware devices stored in an external database upon reboot, initiating an enterprise computer system wide scanning to obtain the detected data structures associated with current connected peripheral hardware devices during the reboot, and comparing the obtained data structures associated with the last detected connected peripheral hardware devices and the current connected peripheral hardware devices to determine whether there is any chance in system resources associated with the connected peripheral hardware devices during the reboot.Type: GrantFiled: September 18, 2008Date of Patent: June 26, 2012Assignee: Hewlett-Packard Development Company, L.P.Inventors: Jeevan Basavaraju, Harish Kuttan, Santosh Ananth Rao
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Patent number: 7925876Abstract: A computer includes an extensible firmware interface with a storage device enumeration function that performs storage device enumeration operations in parallel.Type: GrantFiled: August 14, 2007Date of Patent: April 12, 2011Assignee: Hewlett-Packard Development Company, L.P.Inventors: Terry Ping-Chung Lee, Ram Krishan Kaul, Vijay Vishwanath Hegde, Santosh Ananth Rao
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Patent number: 7797468Abstract: In certain, currently available data-storage systems, incoming commands from remote host computers are subject to several levels of command-queue-depth-fairness-related throttles to ensure that all host computers accessing the data-storage systems receive a reasonable fraction of data-storage-system command-processing bandwidth to avoid starvation of one or more host computers. Recently, certain host-computer-to-data-storage-system communication protocols have been enhanced to provide for association of priorities with commands. However, these new command-associated priorities may lead to starvation of priority levels and to a risk of deadlock due to priority-level starvation and priority inversion. In various embodiments of the present invention, at least one additional level of command-queue-depth-fairness-related throttling is introduced in order to avoid starvation of one or more priority levels, thereby eliminating or minimizing the risk of priority-level starvation and priority-related deadlock.Type: GrantFiled: October 31, 2006Date of Patent: September 14, 2010Assignee: Hewlett-Packard Development CompanyInventors: George Shin, Rajiv K. Grover, Santosh Ananth Rao
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Publication number: 20090198842Abstract: A system and method for identifying lost/stale peripheral hardware devices connected to an enterprise computer system is disclosed. In one embodiment, a method for identifying lost peripheral hardware devices connected to an enterprise computer system includes initializing system memory by obtaining data structures associated with last detected connected peripheral hardware devices stored in an external database upon reboot, initiating an enterprise computer system wide scanning to obtain the detected data structures associated with current connected peripheral hardware devices during the reboot, and comparing the obtained data structures associated with the last detected connected peripheral hardware devices and the current connected peripheral hardware devices to determine whether there is any chance in system resources associated with the connected peripheral hardware devices during the reboot.Type: ApplicationFiled: September 18, 2008Publication date: August 6, 2009Inventors: Jeevan Basavaraju, Harish Kuttan, Santosh Ananth Rao
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Publication number: 20090049292Abstract: A computer includes an extensible firmware interface with a storage device enumeration function that performs storage device enumeration operations in parallel.Type: ApplicationFiled: August 14, 2007Publication date: February 19, 2009Inventors: Terry Ping-Chung Lee, Ram Krishan Kaul, Vijay Vishwanath Hegde, Santosh Ananth Rao