Patents by Inventor Kalyan C. Gunda

Kalyan C. Gunda 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: 12222913
    Abstract: One example method includes receiving at a dedupe system, from a client, a request that comprises a set of fingerprints, where each fingerprint in the set corresponds to a particular data segment, filtering, at the dedupe system, the set of fingerprints into a set of unique fingerprints and a set of non-unique fingerprints, reading, at the dedupe system, from a container where copies of the non-unique fingerprints are stored, an additional set of non-unique fingerprints, sending, from the dedupe system to the client, a single response that comprises both the set of unique fingerprints and the additional set of non-unique fingerprints, and receiving from the client, at the dedupe system, data segments that respectively correspond to the unique fingerprints in the set of unique fingerprints, but no data segments corresponding to the non-unique fingerprints in the set of non-unique fingerprints are received by the dedupe system from the client.
    Type: Grant
    Filed: November 30, 2023
    Date of Patent: February 11, 2025
    Assignee: EMC IP Holding Company LLC
    Inventors: Kalyan C. Gunda, Jagannathdas Rath
  • Patent number: 12197392
    Abstract: Embodiments for retention locking a deduplicated file stored in cloud storage by defining object metadata for each object of the file, and comprising a lock count and a retention time based on an expiry date of the lock, with each object having segments, the object metadata further having a respective expiry date and lock count for each segment, where at least some segments are shared among two or more files. Also updating the lock count and retention time for all segments of the file being locked; and if the object is not already locked, locking the object using a retention lock defining a retention time and updating the object metadata with a new lock count and the retention time, otherwise incrementing the lock count and updating the retention time for the expiry date if expiry date of a previous lock is older than a current expiry date.
    Type: Grant
    Filed: April 26, 2023
    Date of Patent: January 14, 2025
    Assignee: EMC IP Holding Company LLC
    Inventors: Jagannathdas Rath, Kalyan C. Gunda
  • Patent number: 12197761
    Abstract: One example method includes, at a replication data source, initiating a replication process that includes transmitting a replication stream to a replication destination vault, and data in the replication stream is transmitted by way of a closed airgap between the replication data source and the replication destination vault, switching, by the replication data source, from a transmit mode to a receive mode, receiving, at the replication data source, a first checksum of a file, and the first checksum and file were created at the replication destination vault, receiving, at the replication data source, the file, calculating, at the replication data source, a second checksum of the file, and when the second checksum matches the first checksum, ending the replication process.
    Type: Grant
    Filed: June 29, 2023
    Date of Patent: January 14, 2025
    Assignee: EMC IP Holding Company LLC
    Inventors: Kalyan C. Gunda, Jagannathdas Rath
  • Patent number: 12192306
    Abstract: The disclosure provides a system, computer readable medium, and computer-implemented method for managing data access. The method includes obtaining a data access request from a requestor for client data redundantly stored in at least two storage providers that are unknown to the requestor; identifying a service level objective for servicing the data access request; ranking the at least two storage providers based on the service level objective to identify one of the at least two storage providers to service the data access request; and providing the requestor with access to a copy of the client data using the one of the at least two storage providers.
    Type: Grant
    Filed: June 17, 2021
    Date of Patent: January 7, 2025
    Assignee: EMC IP HOLDING COMPANY LLC
    Inventors: Kalyan C. Gunda, Jagannathdas Rath, Santi Gopal Mondal, Arun Vishnu Pk, Veera Venkata Prasad Jagarlamudi
  • Publication number: 20240419351
    Abstract: One example method includes, at a replication data source, initiating a replication process that includes transmitting a replication stream to a replication destination vault, and data in the replication stream is transmitted by way of a closed airgap between the replication data source and the replication destination vault, switching, by the replication data source, from a transmit mode to a receive mode, receiving, at the replication data source, a first checksum of a file, and the first checksum and file were created at the replication destination vault, receiving, at the replication data source, the file, calculating, at the replication data source, a second checksum of the file, and when the second checksum matches the first checksum, ending the replication process.
    Type: Application
    Filed: August 28, 2024
    Publication date: December 19, 2024
    Inventors: Kalyan C. Gunda, Jagannathdas Rath
  • Publication number: 20240419352
    Abstract: One example method includes, at a replication data source, initiating a replication process that includes transmitting a replication stream to a replication destination vault, and data in the replication stream is transmitted by way of a closed airgap between the replication data source and the replication destination vault, switching, by the replication data source, from a transmit mode to a receive mode, receiving, at the replication data source, a first checksum of a file, and the first checksum and file were created at the replication destination vault, receiving, at the replication data source, the file, calculating, at the replication data source, a second checksum of the file, and when the second checksum matches the first checksum, ending the replication process.
    Type: Application
    Filed: August 28, 2024
    Publication date: December 19, 2024
    Inventors: Kalyan C. Gunda, Jagannathdas Rath
  • Publication number: 20240385758
    Abstract: Resources of a deduplicated storage appliance are monitored to generate a consumption matrix indicating resource utilization. A threshold map associated with a subsystem is accessed. The subsystem is responsible for an operation involving files stored in the appliance. The threshold map specifies resources required by the subsystem for the operation and thresholds below which multi-streaming for the operation is allowed. An assessment is made as to whether the operation should be handled by multi-streaming. The assessment includes determining whether the resources are underutilized or overutilized based on the consumption matrix and the threshold map. When the resources are overutilized, multi-streaming is not triggered. When the resources are underutilized, multi-streaming is triggered. Periodic reassessments are made to determine whether the operation should be handled by multi-streaming.
    Type: Application
    Filed: May 21, 2023
    Publication date: November 21, 2024
    Inventors: Shashank Prakash Khobragade, Santi Gopal Mondal, Kalyan C. Gunda
  • Patent number: 12141035
    Abstract: A self-healing method of recovering files using a cyber recovery vault for deduplication filesystems. Data to be backed up from a production system to a backup system in a datacenter is also copied to a cyber security vault coupled to the data center through an air gapped connection. A copy process makes a point-in-time (PIT) copy of the portion of data to a namespace in the vault, and retention locks the copied portion in the vault. An automated process detects a missing segment error, such as due to a bad index lookup in the data to be backed up. The self-healing process provides the missing segment from the PIT copy in the cyber security vault. For any missing fingerprints the process adds the data in new containers and the references in the index, providing an indirection that allows for just writing a new container with the missing L0 references and updating the index.
    Type: Grant
    Filed: June 13, 2022
    Date of Patent: November 12, 2024
    Assignee: Dell Products L.P.
    Inventors: Nitin Madan, Bhimsen Bhanjois, Kalyan C. Gunda
  • Patent number: 12124477
    Abstract: A system can register, by a replication component and with a notification component, for notifications to changes in a group of data in data storage, wherein the notification component is configured to write respective changes in the group of data to a replication stream. The system can retrieve, by the replication component, a change of the changes in the group of data from the replication stream. The system can, in response to determining that the change corresponds to a replication policy, replicate, by the replication component, data of the group of data that corresponds to the change to a target system, wherein the replication component is configured to perform a replication on target systems having respective different storage types.
    Type: Grant
    Filed: November 29, 2022
    Date of Patent: October 22, 2024
    Assignee: DELL PRODUCTS L.P.
    Inventors: Kalyan C. Gunda, Richard Chenyu Ding, Zongque Xu
  • Patent number: 12118223
    Abstract: One example method includes receiving, at a cloud storage site, a write request that identifies an object to be written to the cloud storage site, storing the object at the cloud storage site, receiving, at the cloud storage site, a read request that identifies the object, performing, at the cloud storage site, an evaluation of the object to determine if the object is corrupted, and sending a message identifying an outcome of the evaluation. One or more of the operations at the cloud storage site may be performed by an Object Lambda function that has been configured by a dedupe application.
    Type: Grant
    Filed: July 21, 2022
    Date of Patent: October 15, 2024
    Assignee: DELL PRODUCTS L.P.
    Inventors: Jagannathdas Rath, Kalyan C. Gunda
  • Patent number: 12117907
    Abstract: Methods of cloning data backup across namespaces are disclosed. In response to receiving a file replication request, one or more source files are cloned from a first namespace to a second namespace, as one or more destination files. A first attribute indicating that the source file(s) have been cloned to the second namespace as the destination file(s) is created. A source synthetic file is cloned from the first namespace to the second namespace, as a destination synthetic file, where synthetic information of the destination synthetic file points to the source file(s) as one or more base file. A second attribute indicating that the source synthetic file has been cloned to the second namespace as the destination synthetic file is created. Based on the first and second attributes, the synthetic information of the destination synthetic file is updated or propagated to use the destination file(s) as one or more base files on the second namespace.
    Type: Grant
    Filed: April 29, 2022
    Date of Patent: October 15, 2024
    Assignee: DELL PRODUCTS L.P.
    Inventors: Nitin Madan, Bhimsen Bhanjois, Kalyan C. Gunda, Srisailendra Yallapragada, Alok Katiyar, Salil Dangi, Sanjay Vedanthan
  • Patent number: 12105594
    Abstract: Embodiments for processing fastcopy overwrite backup workloads (FCOW) as virtual synthetic backups, by detecting whether or not a backup workload comprises an FCOW workload in which a base file is fastcopied to a target file, wherein portions of the base file are overwritten through overwrites by new data in the target file by a deduplication backup process. For FCOW workloads, the process creates a file recipe by trapping seek offsets and write byte lengths for the overwrites, and writing extent information comprising offset differences to a recipe table of the file recipe, and the file recipe facilitates file processing optimizations including differencing, replication, and tiering.
    Type: Grant
    Filed: June 16, 2022
    Date of Patent: October 1, 2024
    Assignee: Dell Products L.P.
    Inventors: Nitin Madan, Bhimsen Bhanjois, Kalyan C. Gunda
  • Patent number: 12099442
    Abstract: A method, apparatus, and system manages an object in a storage provider that provides a plurality of storage classes of storage. The method may include receiving a request for transfer of the object comprising segments from a first storage class to a second storage class of the storage provider; storing metadata associated with the object; determining that each of the segments satisfies a data storage policy based on the access characteristics of each of the segments within the object, wherein the determining includes: determining that none of the segments are referenced by the new segment for a predetermined time period; determining that none of the segments are accessed for the predetermined time period from the last accessed time instance; and in response to determining that each of the segments satisfies the data storage policy, transferring the object from the first storage class to the second storage class of the storage provider.
    Type: Grant
    Filed: January 7, 2022
    Date of Patent: September 24, 2024
    Assignee: DELL PRODUCTS L.P.
    Inventors: Jagannathdas Rath, Kalyan C Gunda
  • Publication number: 20240295978
    Abstract: One example method includes receiving, at a cloud storage site, a write request that identifies an object to be written to the cloud storage site, storing the object at the cloud storage site, receiving, at the cloud storage site, a read request that identifies the object, performing, at the cloud storage site, an evaluation of the object to determine if the object is corrupted, and sending a message identifying an outcome of the evaluation. One or more of the operations at the cloud storage site may be performed by an Object Lambda function that has been configured by a dedupe application.
    Type: Application
    Filed: April 25, 2024
    Publication date: September 5, 2024
    Inventors: Jagannathdas Rath, Kalyan C. Gunda
  • Patent number: 12032536
    Abstract: One example method includes receiving at a dedupe system, from a client, a request that comprises a set of fingerprints, where each fingerprint in the set corresponds to a particular data segment, filtering, at the dedupe system, the set of fingerprints into a set of unique fingerprints and a set of non-unique fingerprints, reading, at the dedupe system, from a container where copies of the non-unique fingerprints are stored, an additional set of non-unique fingerprints, sending, from the dedupe system to the client, a single response that comprises both the set of unique fingerprints and the additional set of non-unique fingerprints, and receiving from the client, at the dedupe system, data segments that respectively correspond to the unique fingerprints in the set of unique fingerprints, but no data segments corresponding to the non-unique fingerprints in the set of non-unique fingerprints are received by the dedupe system from the client.
    Type: Grant
    Filed: March 3, 2021
    Date of Patent: July 9, 2024
    Assignee: EMC IP HOLDING COMPANY LLC
    Inventors: Kalyan C. Gunda, Jagannathdas Rath
  • Patent number: 12032529
    Abstract: Methods of cloning data backup across namespaces are disclosed. One or more source files are cloned from a first namespace to a second namespace, as one or more destination files. When the cloning of the source file(s) is performed, a data structure including source file information and destination file information is generated. A source synthetic file is cloned from the first namespace to the second namespace, as a destination synthetic file, where the source synthetic file uses the source file(s) as one or more base files on the first namespace. When the cloning of the source synthetic file is performed, the data structure is looked up to obtain the source file information and the destination file information. Based on the source file information and the destination file information, synthetic information of the destination synthetic file is updated to use the destination file(s) as one or more base files on the second namespace.
    Type: Grant
    Filed: April 29, 2022
    Date of Patent: July 9, 2024
    Assignee: DELL PRODUCTS L.P.
    Inventors: Nitin Madan, Bhimsen Bhanjois, Kalyan C. Gunda, Srisailendra Yallapragada, Alok Katiyar, Salil Dangi, Sanjay Vedanthan
  • Patent number: 12026377
    Abstract: A method, apparatus, and system for managing backup resource on a cloud for a plurality of backup servers is disclosed. A resource configuration for each cloud storage is received. The resource configuration includes allocated cloud resource amount and duration. Cloud operation utilization is calculated for each cloud storage. The cloud operation utilization is compared with the resource configuration to determine a total cloud operation utilization for each cloud storage. A plurality of rules is applied in view of the total cloud operation utilization to determine a plurality of cloud storage operational states. The cloud storage is configured to be in one of the plurality of cloud storage operational states based on the plurality of rules to limit an amount of data to be transmitted to and stored in the cloud storage within a predetermined period of time.
    Type: Grant
    Filed: May 28, 2021
    Date of Patent: July 2, 2024
    Assignee: EMC IP HOLDING COMPANY LLC
    Inventors: Jagannathdas Rath, Kalyan C Gunda
  • Publication number: 20240193045
    Abstract: One example method includes identifying a cloud object as a potential candidate for defragmentation, evaluating the cloud object to determine what portion of segments of the cloud object are expired, when the portion of expired segments meets or exceeds a threshold, segregating the expired segments and unexpired segments of the cloud object, creating a first new cloud object that includes only unexpired segments, creating a second new cloud object that includes only expired segments, and deleting the cloud object from storage.
    Type: Application
    Filed: February 16, 2024
    Publication date: June 13, 2024
    Inventors: Jagannathdas Rath, Kalyan C. Gunda
  • Publication number: 20240176799
    Abstract: A system can register, by a replication component and with a notification component, for notifications to changes in a group of data in data storage, wherein the notification component is configured to write respective changes in the group of data to a replication stream. The system can retrieve, by the replication component, a change of the changes in the group of data from the replication stream. The system can, in response to determining that the change corresponds to a replication policy, replicate, by the replication component, data of the group of data that corresponds to the change to a target system, wherein the replication component is configured to perform a replication on target systems having respective different storage types.
    Type: Application
    Filed: November 29, 2022
    Publication date: May 30, 2024
    Inventors: Kalyan C. Gunda, Richard Chenyu Ding, Zongque Xu
  • Publication number: 20240168629
    Abstract: A system can determine to write a data object to a storage system that implements an append-only write policy to data chunks. The system can divide a data chunk of the data chunks into a number of data segments. The system can divide respective data segments of the number of data segments into respective stripes. The system can write a first portion of data of the data object to first stripes of the respective stripes. The system can, after writing the first portion of data of the data object to the first stripes, and independently of writing a second portion of data of the data object to second stripes of the respective stripes, determine erasure coding values, and write respective erasure coding values of the erasure coding values to respective erasure coding stripes that are separate from the respective stripes, The system can store the data chunk.
    Type: Application
    Filed: November 22, 2022
    Publication date: May 23, 2024
    Inventors: Jiang Cao, Kalyan C. Gunda, Gary Jialei Wu, Chark Wenshuai Yu