Patents by Inventor PRADEEP KRISHNAMURTHY

PRADEEP KRISHNAMURTHY 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).

  • Publication number: 20210004162
    Abstract: The disclosure herein describes managing a rate of processing unmap requests for a data storage volume. Unmap requests are received from a cluster of active hosts that are associated with the data storage volume. Latency data values of each active host are then accessed. A long-term cluster latency average value is calculated based on the accessed latency data values of all active hosts over a long-term time period and a short-term cluster latency average value is calculated based on the accessed latency data values of all active hosts over a short-term time period. An unmap rate adjustment value is calculated based on a difference between the long-term cluster latency average value and the short-term cluster latency average value. The rate of processing unmap requests for the data storage volume is adjusted based on the unmap rate adjustment value and the unmap requests are performed based on the adjusted rate.
    Type: Application
    Filed: September 23, 2020
    Publication date: January 7, 2021
    Inventors: Pradeep KRISHNAMURTHY, Prasanna AITHAL
  • Publication number: 20200341894
    Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for reclaiming one or more portions of storage resources in a computer system serving one or more virtual computing instances, where the storage resources in the computer system are organized in clusters of storage blocks. In one aspect, a method includes maintaining a respective block tracking value for each storage block that indicates whether a call to reclaim the storage block is outstanding; determining, from the block tracking values, a respective cluster priority value for each of the clusters based on a count of storage blocks in the respective cluster for which a call to reclaim is outstanding; and reclaiming a first portion of storage resources in the computer system in accordance with the cluster priority values.
    Type: Application
    Filed: July 10, 2020
    Publication date: October 29, 2020
    Inventors: Pradeep KRISHNAMURTHY, Prasanna AITHAL, Asit DESAI, Bryan BRANSTETTER, Mahesh S. HIREGOUDAR, Prasad Rao JANGAM, Rohan PASALKAR, Srinivasa SHANTHARAM, Raghavan PICHAI
  • Publication number: 20200285398
    Abstract: The disclosure herein describes managing a rate of processing unmap requests for a data storage volume. Unmap requests are received from a cluster of active hosts that are associated with the data storage volume. Latency data values of each active host are then accessed. A long-term cluster latency average value is calculated based on the accessed latency data values of all active hosts over a long-term time period and a short-term cluster latency average value is calculated based on the accessed latency data values of all active hosts over a short-term time period. An unmap rate adjustment value is calculated based on a difference between the long-term cluster latency average value and the short-term cluster latency average value. The rate of processing unmap requests for the data storage volume is adjusted based on the unmap rate adjustment value and the unmap requests are performed based on the adjusted rate.
    Type: Application
    Filed: May 15, 2019
    Publication date: September 10, 2020
    Inventors: PRADEEP KRISHNAMURTHY, Prasanna Aithal
  • Publication number: 20200192712
    Abstract: A method is provided for a computer to allocate a file a resource from a clustered file system (CFS) volume stored on one or more physical storage devices. The CFS volume includes resources organized into resource clusters and the resource clusters make up regions. The method includes, for each region of resource clusters, determining a first count of resources allocated to the host computer and a second count of resources allocated to all other host computers, and calculating a region weight based on the first count and the second count. The method further includes sorting a list of the regions based on their region weights, selecting a region at or near the start of the list, and allocating the resource from a resource cluster in the selected region to the file.
    Type: Application
    Filed: February 25, 2019
    Publication date: June 18, 2020
    Inventors: PRADEEP KRISHNAMURTHY, SRIKANTH MAHABALARAO, PRASANNA AITHAL, MAHESH HIREGOUDAR
  • Publication number: 20200150865
    Abstract: The disclosure provides an approach for zeroing allocated storage blocks of a file. The blocks are zeroed in the background, during a normal operation of a storage system, thus lowering the chance that the latency of a storage operation would be increased by the zeroing process. The approach also precludes a delay in being able to use the file, the delay caused by pre-zeroing the storage blocks prior to use of the file.
    Type: Application
    Filed: February 12, 2019
    Publication date: May 14, 2020
    Inventor: PRADEEP KRISHNAMURTHY
  • Publication number: 20200117358
    Abstract: The disclosure provides an approach for performing a write to a storage system, the write having reduced latency due to parallelism of sub-steps of the write, and due to calculating a partial rather than a full checksum. The mechanism of the write has low file corruption of files on the storage system, due to journaling of the checksum.
    Type: Application
    Filed: February 6, 2019
    Publication date: April 16, 2020
    Inventors: PRADEEP KRISHNAMURTHY, Srikanth Mahabalarao
  • Publication number: 20180314632
    Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for reclaiming one or more portions of storage resources in a computer system serving one or more virtual computing instances, where the storage resources in the computer system are organized in clusters of storage blocks. In one aspect, a method includes maintaining a respective block tracking value for each storage block that indicates whether a call to reclaim the storage block is outstanding; determining, from the block tracking values, a respective cluster priority value for each of the clusters based on a count of storage blocks in the respective cluster for which a call to reclaim is outstanding; and reclaiming a first portion of storage resources in the computer system in accordance with the cluster priority values.
    Type: Application
    Filed: July 10, 2017
    Publication date: November 1, 2018
    Inventors: PRADEEP KRISHNAMURTHY, PRASANNA AITHAL, ASIT DESAI, BRYAN BRANSTETIER, MAHESH S. HIREGOUDAR, PRASAD RAO JANGAM, ROHAN PASALKAR, SRINIVASA SHANTHARAM, RAGHAVAN PICHAI
  • Publication number: 20180267986
    Abstract: The systems described herein are configured to enhance the efficiency of memory usage and access in a VM file system data store with respect to allocating memory in large and small file block clusters using affinity metadata and propagating and maintaining the affinity metadata in support of the described allocation. During storage of file data, an affinity identifier of the file data is determined. The affinity identifier is used to identify a large file block cluster and a small file block cluster within the identified large file block cluster. The file data is stored in the selected small file block cluster and affinity metadata of the selected small file block cluster is updated to reflect the storage of the file data.
    Type: Application
    Filed: June 7, 2017
    Publication date: September 20, 2018
    Inventors: ASIT DESAI, PRASANNA AITHAL, BRYAN BRANSTETTER, ROHAN PASALKAR, PRASAD RAO JANGAM, MAHESH S. HIREGOUDAR, PRADEEP KRISHNAMURTHY, SRINIVASA SHANTHARAM
  • Publication number: 20180267991
    Abstract: The systems described herein are configured to enhance the efficiency of memory usage and access in a VM file system data store with respect to allocating memory in large and small file block clusters using affinity metadata and propagating and maintaining the affinity metadata in support of the described allocation. In order to maintain affinity metadata of the large file block cluster, affinity generation values stored on the large file block cluster are read and cached affinity generation values for each small file block cluster are read from an in-memory cache associated with the large file block cluster. When the stored affinity generation values and the cached affinity generation values do not match, affinity metadata from all the small file block clusters associated with the large file block cluster is used to update the affinity metadata of the large file block cluster and the associated cache.
    Type: Application
    Filed: June 7, 2017
    Publication date: September 20, 2018
    Inventors: ASIT DESAI, Prasanna AITHAL, Bryan BRANSTETTER, Rohan PASALKAR, Prasad Rao JANGAM, Mahesh S. HIREGOUDAR, Pradeep KRISHNAMURTHY, Srinivasa SHANTHARAM
  • Publication number: 20180260405
    Abstract: System and method for executing a file system operation for a computer system utilize a computed hash value of a file system object to access a hash block of a file system directory stored in a storage system to locate a hash slot corresponding to the computed hash value. Using at least one of a hash pointer in the hash slot and an allocation block of the file system directory, a dirent slot in a dirent block of the file system directory is located to perform an operational task on the particular dirent slot to execute the file system operation.
    Type: Application
    Filed: June 23, 2017
    Publication date: September 13, 2018
    Inventors: SRINIVASA SHANTHARAM, PRADEEP KRISHNAMURTHY, ASIT DESAI, PRASANNA AITHAL, BRYAN BRANSTETTER, PRASAD RAO JANGAM, MAHESH S. HIREGOUDAR, RAGHAVAN PICHAI, VIVEK PATIDAR
  • Publication number: 20180253442
    Abstract: Techniques for decoupling the commit and replay of file system metadata updates in a clustered file system (CFS) are provided. In one embodiment, a CFS layer of a computer system can receive a file I/O operation from a client application, where the file I/O operation involves an update to a file system metadata resource maintained on persistent storage. In response, a journaling component of the CFS layer can execute a commit phase for committing the update to a journal on the persistent storage. The CFS layer can then return an acknowledgment to the client application indicating that the file I/O operation is complete, where the acknowledgement is returned prior to completion of a replay phase configured to propagate the update from the journal to one or more locations on the persistent storage where the file system metadata resource is actually stored.
    Type: Application
    Filed: June 5, 2017
    Publication date: September 6, 2018
    Inventors: PRASANNA AITHAL, ASIT DESAI, BRYAN BRANSTETTER, PRADEEP KRISHNAMURTHY, PRASAD RAO JANGAM
  • Publication number: 20180239779
    Abstract: A distributed file system may be configured with file blocks of a first type and file blocks of a second type, from allocation units that comprise a logical volume containing the file system. File blocks of the second type may be defined from one or more file blocks of the first type. A thick file may be instantiated with a number of allocation units totaling a size greater than or equal to a specified file size of the thick file. The allocation units may be allocated to the thick file in units of file blocks of the first type or file blocks of the second type, depending on the specified file size of the thick file.
    Type: Application
    Filed: May 18, 2017
    Publication date: August 23, 2018
    Inventors: ASIT DESAI, PRASANNA AITHAL, PRASAD RAO JANGAM, BRYAN BRANSTETTER, MAHESH S. HIREGOUDAR, PRADEEP KRISHNAMURTHY, ROHAN PASALKAR, RAGHAVAN PICHAI, SRINIVASA SHANTHARAM