Patents by Inventor Mayank RAWAT

Mayank RAWAT 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).

  • Patent number: 11188253
    Abstract: In a computer system with a disk array that has physical storage devices arranged as logical storage units and is capable of carrying out hardware storage operations on a per logical storage unit basis, data movement operations can be carried out on a per-file basis. A data mover software component for use in a computer or storage system enables cloning and initialization of data to provide high data throughput without moving the data between the kernel and application levels.
    Type: Grant
    Filed: September 12, 2016
    Date of Patent: November 30, 2021
    Assignee: VMware, Inc.
    Inventors: Satyam B. Vaghani, Mayank Rawat, Abhishek Rai
  • Patent number: 11188254
    Abstract: In a computer system with a disk array that has physical storage devices arranged as logical storage units and is capable of carrying out hardware storage operations on a per logical storage unit basis, data movement operations can be carried out on a per-file basis. A data mover software component for use in a computer or storage system enables cloning and initialization of data to provide high data throughput without moving the data between the kernel and application levels.
    Type: Grant
    Filed: January 18, 2017
    Date of Patent: November 30, 2021
    Assignee: VMware, Inc.
    Inventors: Satyam B. Vaghani, Mayank Rawat, Abhishek Rai
  • Patent number: 11093402
    Abstract: Techniques for using a cache to accelerate virtual machine (VM) I/O are provided. In one embodiment, a host system can intercept an I/O request from a VM running on the host system, where the I/O request is directed to a virtual disk residing on a shared storage device. The host system can then process the I/O request by accessing a cache that resides on one or more cache devices directly attached to the host system, where the accessing of the cache is transparent to the VM.
    Type: Grant
    Filed: August 27, 2019
    Date of Patent: August 17, 2021
    Assignee: VMware, Inc.
    Inventors: Thomas A Phelan, Mayank Rawat, Deng Liu, Kiran Madnani, Sambasiva Bandarupalli
  • Patent number: 10860560
    Abstract: User data of different snapshots for the same virtual disk are stored in the same storage object. Similarly, metadata of different snapshots for the same virtual disk are stored in the same storage object, and log data of different snapshots for the same virtual disk are stored in the same storage object. As a result, the number of different storage objects that are managed for snapshots do not increase proportionally with the number of snapshots taken. In addition, any one of the multitude of persistent storage back-ends can be selected as the storage back-end for the storage objects according to user preference, system requirement, snapshot policy, or any other criteria. Another advantage is that the storage location of the read data can be obtained with a single read of the metadata storage object, instead of traversing metadata files of multiple snapshots.
    Type: Grant
    Filed: January 29, 2018
    Date of Patent: December 8, 2020
    Assignee: VMware, Inc.
    Inventors: Mayank Rawat, Ritesh Shukla, Li Ding, Serge Pashenkov, Raveesh Ahuja
  • Patent number: 10802927
    Abstract: System and method for checking and characterizing metadata of snapshots utilize a snapshot metadata database to execute at least one of checking and characterizing operations on the metadata of snapshots. The snapshot metadata database includes information extracted from backing storage elements containing the metadata of snapshots.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: October 13, 2020
    Assignee: VMware, Inc.
    Inventors: Cheng Li, Li Ding, Bret Needle, Mayank Rawat
  • Patent number: 10657101
    Abstract: Techniques for utilizing flash storage as an extension of hard disk (HDD) storage are provided. In one embodiment, a computer system stores a subset of blocks of a logical file in a first physical file, associated with a first data structure that represents a filesystem object, on flash storage and a subset of blocks, associated with a second data structure that represents a filesystem object comprising tiering configuration information that includes an identifier of the first physical file, in a second physical file on HDD storage. The computer system processes an I/O request directed to the logical file by directing it to either the physical file on the flash storage or the HDD storage by verifying that the tiering configuration information exists in the data structure and determining whether the one or more blocks are part of the first subset of blocks or the second subset of blocks.
    Type: Grant
    Filed: May 25, 2018
    Date of Patent: May 19, 2020
    Assignee: VMware, Inc.
    Inventors: Deng Liu, Sandeep Uttamchandani, Li Zhou, Mayank Rawat
  • Publication number: 20190384712
    Abstract: Techniques for using a cache to accelerate virtual machine (VM) I/O are provided. In one embodiment, a host system can intercept an I/O request from a VM running on the host system, where the I/O request is directed to a virtual disk residing on a shared storage device. The host system can then process the I/O request by accessing a cache that resides on one or more cache devices directly attached to the host system, where the accessing of the cache is transparent to the VM.
    Type: Application
    Filed: August 27, 2019
    Publication date: December 19, 2019
    Inventors: Thomas A. Phelan, Mayank Rawat, Deng Liu, Kiran Madnani, Sambasiva Bandarupalli
  • Patent number: 10437727
    Abstract: Techniques for using a cache to accelerate virtual machine (VM) I/O are provided. In one embodiment, a host system can intercept an I/O request from a VM running on the host system, where the I/O request is directed to a virtual disk residing on a shared storage device. The host system can then process the I/O request by accessing a cache that resides on one or more cache devices directly attached to the host system, where the accessing of the cache is transparent to the VM.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: October 8, 2019
    Assignee: VMWARE, INC.
    Inventors: Thomas A Phelan, Mayank Rawat, Deng Liu, Kiran Madnani, Sambasiva Bandarupalli
  • Patent number: 10262016
    Abstract: Techniques for tuning the key space of an instance of a tree data structure are provided. In one embodiment, a computer system can receive a request to create the instance, where the request includes an expected key space value indicating an expected range of key values to be addressed by the instance. The computer system can further calculate a number of bits to allocate to each key of each node of the instance based on the expected key space value. The computer system can then, at a time of instantiating each node of the instance, allocate the keys for the node in accordance with the calculated number of bits.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: April 16, 2019
    Assignee: VMWARE, INC.
    Inventors: Ritesh Shukla, Serge Pashenkov, Li Ding, Bret Needle, Mayank Rawat
  • Publication number: 20180276233
    Abstract: Techniques for utilizing flash storage as an extension of hard disk (HDD) storage are provided. In one embodiment, a computer system stores a subset of blocks of a logical file in a first physical file, associated with a first data structure that represents a filesystem object, on flash storage and a subset of blocks, associated with a second data structure that represents a filesystem object comprising tiering configuration information that includes an identifier of the first physical file, in a second physical file on HDD storage. The computer system processes an I/O request directed to the logical file by directing it to either the physical file on the flash storage or the HDD storage by verifying that the tiering configuration information exists in the data structure and determining whether the one or more blocks are part of the first subset of blocks or the second subset of blocks.
    Type: Application
    Filed: May 25, 2018
    Publication date: September 27, 2018
    Inventors: Deng Liu, Sandeep Uttamchandani, Li Zhou, Mayank Rawat
  • Patent number: 10067966
    Abstract: Techniques for dynamically allocating keys in an instance of a tree data structure are provided. In one embodiment, a computer system can, at a time of instantiating each non-root node in the instance, determine a key space to be addressed by the non-root node, where the key space is based on a key subinterval in a parent node of the non-root node that is associated with a pointer to the non-root node. The computer system can further calculate a number of bits to allocate to each key of the non-root node in view of the determined key space. The computer system can then allocate the keys of the non-root node in accordance with the calculated number of bits.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: September 4, 2018
    Assignee: VMWARE, INC.
    Inventors: Serge Pashenkov, Ritesh Shukla, Li Ding, Bret Needle, Mayank Rawat
  • Publication number: 20180246810
    Abstract: Techniques for using a cache to accelerate virtual machine (VM) I/O are provided. In one embodiment, a host system can intercept an I/O request from a VM running on the host system, where the I/O request is directed to a virtual disk residing on a shared storage device. The host system can then process the I/O request by accessing a cache that resides on one or more cache devices directly attached to the host system, where the accessing of the cache is transparent to the VM.
    Type: Application
    Filed: April 27, 2018
    Publication date: August 30, 2018
    Inventors: Thomas A. Phelan, Mayank Rawat, Deng Liu, Kiran Madnani, Sambasiva Bandarupalli
  • Patent number: 10007448
    Abstract: A method for restoring a data volume using incremental snapshots of the data volume includes creating a first series of incremental snapshots according to a first predefined interval. The method further includes creating a second series of incremental snapshots according to a second predefined interval that is an integer multiple of the first predefined interval. The method also includes receiving a request to restore the data volume to a point-in-time. The method further includes restoring the data volume to the point-in-time using none or some of the snapshots in the first series that were created at or prior to the point-in-time, and all of the snapshots in the second series that were created at or prior to the point-in-time.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: June 26, 2018
    Assignee: VMware, Inc.
    Inventors: Michael Zucca, Keith Farkas, Joanne Ren, Mayank Rawat, Christos Karamanolis
  • Publication number: 20180150492
    Abstract: User data of different snapshots for the same virtual disk are stored in the same storage object. Similarly, metadata of different snapshots for the same virtual disk are stored in the same storage object, and log data of different snapshots for the same virtual disk are stored in the same storage object. As a result, the number of different storage objects that are managed for snapshots do not increase proportionally with the number of snapshots taken. In addition, any one of the multitude of persistent storage back-ends can be selected as the storage back-end for the storage objects according to user preference, system requirement, snapshot policy, or any other criteria. Another advantage is that the storage location of the read data can be obtained with a single read of the metadata storage object, instead of traversing metadata files of multiple snapshots.
    Type: Application
    Filed: January 29, 2018
    Publication date: May 31, 2018
    Inventors: Mayank RAWAT, Ritesh SHUKLA, Li DING, Serge PASHENKOV, Raveesh AHUJA
  • Patent number: 9984089
    Abstract: Techniques for utilizing flash storage as an extension of hard disk (HDD) storage are provided. In one embodiment, a computer system stores a subset of blocks of a logical file in a first physical file, associated with a first data structure that represents a filesystem object, on flash storage and a subset of blocks, associated with a second data structure that represents a filesystem object comprising tiering configuration information that includes an identifier of the first physical file, in a second physical file on HDD storage. The computer system processes an I/O request directed to the logical file by directing it to either the physical file on the flash storage or the HDD storage by verifying that the tiering configuration information exists in the data structure and determining whether the one or more blocks are part of the first subset of blocks or the second subset of blocks.
    Type: Grant
    Filed: October 21, 2015
    Date of Patent: May 29, 2018
    Assignee: VMware, Inc.
    Inventors: Deng Liu, Sandeep Uttamchandani, Li Zhou, Mayank Rawat
  • Patent number: 9983998
    Abstract: Techniques for using a cache to accelerate virtual machine (VM) I/O are provided. In one embodiment, a host system can intercept an I/O request from a VM running on the host system, where the I/O request is directed to a virtual disk residing on a shared storage device. The host system can then process the I/O request by accessing a cache that resides on one or more cache devices directly attached to the host system, where the accessing of the cache is transparent to the VM.
    Type: Grant
    Filed: May 3, 2016
    Date of Patent: May 29, 2018
    Assignee: VMWARE, Inc.
    Inventors: Thomas A Phelan, Mayank Rawat, Deng Liu, Kiran Madnani, Sambasiva Bandarupalli
  • Publication number: 20180137014
    Abstract: System and method for checking and characterizing metadata of snapshots utilize a snapshot metadata database to execute at least one of checking and characterizing operations on the metadata of snapshots. The snapshot metadata database includes information extracted from backing storage elements containing the metadata of snapshots.
    Type: Application
    Filed: November 17, 2016
    Publication date: May 17, 2018
    Applicant: VMware, Inc.
    Inventors: Cheng Li, Li Ding, Bret Needle, Mayank Rawat
  • Patent number: 9881040
    Abstract: User data of different snapshots for the same virtual disk are stored in the same storage object. Similarly, metadata of different snapshots for the same virtual disk are stored in the same storage object, and log data of different snapshots for the same virtual disk are stored in the same storage object. As a result, the number of different storage objects that are managed for snapshots do not increase proportionally with the number of snapshots taken. In addition, any one of the multitude of persistent storage back-ends can be selected as the storage back-end for the storage objects according to user preference, system requirement, snapshot policy, or any other criteria. Another advantage is that the storage location of the read data can be obtained with a single read of the metadata storage object, instead of traversing metadata files of multiple snapshots.
    Type: Grant
    Filed: August 20, 2015
    Date of Patent: January 30, 2018
    Assignee: VMware, Inc.
    Inventors: Mayank Rawat, Ritesh Shukla, Li Ding, Serge Pashenkov, Raveesh Ahuja
  • Patent number: 9778847
    Abstract: Techniques for surfacing host-side flash storage capacity to a plurality of VMs running on a host system are provided. In one embodiment, the host system creates, for each VM in the plurality of VMs, a flash storage space allocation in a flash storage device that is locally attached to the host system. The host system then causes the flash storage space allocation to be readable and writable by the VM as a virtual flash memory device.
    Type: Grant
    Filed: October 21, 2015
    Date of Patent: October 3, 2017
    Assignee: VMware, Inc.
    Inventors: Thomas A. Phelan, Mayank Rawat, Kiran Madnani, Wei Zhang, Deng Liu, Sambasiva Bandarupalli
  • Publication number: 20170124112
    Abstract: In a computer system with a disk array that has physical storage devices arranged as logical storage units and is capable of carrying out hardware storage operations on a per logical storage unit basis, data movement operations can be carried out on a per-file basis. A data mover software component for use in a computer or storage system enables cloning and initialization of data to provide high data throughput without moving the data between the kernel and application levels.
    Type: Application
    Filed: January 18, 2017
    Publication date: May 4, 2017
    Applicant: VMware, Inc.
    Inventors: Satyam B. Vaghani, Mayank Rawat, Abhishek Rai