Patents by Inventor Koen De Keyser

Koen De Keyser 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: 10824612
    Abstract: Novel key ticketing technology includes an example method in which a first request associated with a first object storage operation is received. The first request includes a first timestamp associated with the first object storage operation and a first object identifier identifying a first object associated with the first object storage operation. The method calculates a first inverse timestamp based on the first timestamp, and generates a first object key corresponding to the first object storage operation. The first object key includes at least the first object identifier and the first inverse timestamp. The method further inserts a first entry including the first object key into a key data store at a position relative to other object key entries based on the first object identifier and the first inverse timestamp included in the first object key.
    Type: Grant
    Filed: May 22, 2018
    Date of Patent: November 3, 2020
    Assignee: Western Digital Technologies, Inc.
    Inventors: Carl Rene D'Halluin, Bastiaan Stougie, Koen De Keyser, Thomas Demoor
  • Patent number: 10817193
    Abstract: An object is divided into SD1 first-level pieces. Each first-level piece is stored in a first-level container on a first-level storage entity. A redundant encoding of the first-level containers is stored in RL1 additional first-level containers on RL1 additional first-level storage entities. On each of the first-level storage entities, the locally-stored first-level container is divided into SD2 local second-level pieces. Each second-level piece is stored in a second-level container on a second-level storage entity of the specific first-level storage entity. Each first-level storage entities contains SD2 plus RL2 second-level storage entities. A redundant encoding of the second-level containers is stored in RL2 additional second-level containers on RL2 additional second-level storage entities.
    Type: Grant
    Filed: April 3, 2018
    Date of Patent: October 27, 2020
    Assignee: Western Digital Technologies, Inc.
    Inventors: Carl Rene D'Halluin, Koen De Keyser
  • Patent number: 10749958
    Abstract: A data object can be encoded into a plurality of encoded data fragments and stored on backend storage elements in a distributed encoded storage system. The identifiers and metadata corresponding to each encoded fragment of the data object can be stored in a single metadata unit, which is stored on the backend as encoded fragments. The identifiers of the metadata fragments can be associated with the data object and stored on a low latency frontend storage device. Thus, the amount of metadata per data object stored on expensive low latency frontend storage is reduced to the fragment identifiers. The fragment identifiers can be quickly retrieved, and used to retrieve the identifiers and metadata corresponding to the encoded data fragments from the backend, for retrieval of the data object itself.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: August 18, 2020
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Koen De Keyser, Frederik Jacqueline Luc De Schrijver, Stijn Blyweert, Mark Christiaens
  • Patent number: 10719497
    Abstract: An ordered data object identifier denoted by a value is assigned to each data object grouped to a container object, wherein data object identifiers with successively incremented values are assigned to successive data objects. An ordered container identifier is assigned to each container object with the greatest value of the identifiers of the data objects grouped thereto. A metadata structure with an entry for each container objects is stored. Each entry comprises the ordered container identifier and a reference to the corresponding data. The metadata structure is ordered according to the values of the container identifiers. A request to read a data object contains a corresponding data object identifier. It is determined to which container object the data object is grouped, by locating the first container identifier in the metadata structure with a value greater than or equal to that the requested data object.
    Type: Grant
    Filed: April 3, 2018
    Date of Patent: July 21, 2020
    Assignee: Western Digital Technologies, Inc.
    Inventors: Carl Rene D'Halluin, Koen De Keyser
  • Patent number: 10474368
    Abstract: A data object can be encoded into multiple encoded data fragments and stored on the backend of a distributed encoded storage system. The identifiers and metadata corresponding to each fragment of the data object can be stored in a first section of a metadata unit, and the initial part of the data object in a second section. The metadata unit is encoded into multiple metadata fragments, which are stored on the backend. The identifiers of the metadata fragments can be associated with the data object and stored on a fast frontend storage device. In response to a request to access the data object, the identifiers are used to retrieve the metadata fragments from the backend, and decode the metadata unit. The initial part of the data object is retrieved from the metadata unit and transmitted to the requesting client application to begin processing the data object.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: November 12, 2019
    Assignee: Western Digital Technologies, inc
    Inventors: Koen De Keyser, Frederik Jacqueline Luc De Schrijver, Stijn Blyweert, Mark Christiaens
  • Publication number: 20190324657
    Abstract: A data object can be encoded into multiple encoded data fragments and stored on the backend of a distributed encoded storage system. The identifiers and metadata corresponding to each fragment of the data object can be stored in a first section of a metadata unit, and the initial part of the data object in a second section. The metadata unit is encoded into multiple metadata fragments, which are stored on the backend. The identifiers of the metadata fragments can be associated with the data object and stored on a fast frontend storage device. In response to a request to access the data object, the identifiers are used to retrieve the metadata fragments from the backend, and decode the metadata unit. The initial part of the data object is retrieved from the metadata unit and transmitted to the requesting client application to begin processing the data object.
    Type: Application
    Filed: April 24, 2018
    Publication date: October 24, 2019
    Inventors: Koen De Keyser, Frederik Jacqueline Luc De Schrijver, Stijn Blyweert, Mark Christiaens
  • Publication number: 20190327301
    Abstract: A data object can be encoded into a plurality of encoded data fragments and stored on backend storage elements in a distributed encoded storage system. The identifiers and metadata corresponding to each encoded fragment of the data object can be stored in a single metadata unit, which is stored on the backend as encoded fragments. The identifiers of the metadata fragments can be associated with the data object and stored on a low latency frontend storage device. Thus, the amount of metadata per data object stored on expensive low latency frontend storage is reduced to the fragment identifiers. The fragment identifiers can be quickly retrieved, and used to retrieve the identifiers and metadata corresponding to the encoded data fragments from the backend, for retrieval of the data object itself.
    Type: Application
    Filed: April 24, 2018
    Publication date: October 24, 2019
    Inventors: Koen De Keyser, Frederik Jacqueline Luc De Schrijver, Stijn Blyweert, Mark Christiaens
  • Publication number: 20190303026
    Abstract: An object is divided into SD1 first-level pieces. Each first-level piece is stored in a first-level container on a first-level storage entity. A redundant encoding of the first-level containers is stored in RL1 additional first-level containers on RL1 additional first-level storage entities. On each of the first-level storage entities, the locally-stored first-level container is divided into SD2 local second-level pieces. Each second-level piece is stored in a second-level container on a second-level storage entity of the specific first-level storage entity. Each first-level storage entities contains SD2 plus RL2 second-level storage entities. A redundant encoding of the second-level containers is stored in RL2 additional second-level containers on RL2 additional second-level storage entities.
    Type: Application
    Filed: April 3, 2018
    Publication date: October 3, 2019
    Inventors: Carl Rene D'Halluin, Koen De Keyser
  • Patent number: 10379953
    Abstract: A distributed object storage system has a monitoring agent and/or a maintenance agent configured to determine for each of a plurality of repair tasks the actual concurrent failure tolerance of a corresponding repair data object. The actual concurrent failure tolerance corresponds to the number of storage elements that store sub blocks of the repair data object and are allowed to fail concurrently.
    Type: Grant
    Filed: March 6, 2017
    Date of Patent: August 13, 2019
    Assignee: Western Digital Technologies, Inc.
    Inventors: Koen De Keyser, Frederik De Schrijver, Bastiaan Stougie
  • Patent number: 10379951
    Abstract: Techniques for distributing data in a distributed data storage system using a hierarchy rule that is generated based on a spreading policy and a set of tolerable failures specified by a user in absence of system deployment information are disclosed. The system includes a controller node which receives a request including a spreading policy and a protection level for spreading a first data object. The controller node determines a hierarchy rule corresponding to the spreading policy based on the protection level. The controller node distributes the first data object in the system using the hierarchy rule and the spreading policy. The controller node receives a reconfiguration of system deployment. The controller node distributes a second data object in the system based on providing protection of the protection level to the second data object without affecting protection of the same protection level applied to the first data object.
    Type: Grant
    Filed: September 12, 2018
    Date of Patent: August 13, 2019
    Assignee: Western Digital Technologies, Inc.
    Inventors: Koen De Keyser, Frederik Jacqueline Luc De Schrijver, Stijn Blyweert
  • Publication number: 20190188291
    Abstract: An ordered data object identifier denoted by a value is assigned to each data object grouped to a container object, wherein data object identifiers with successively incremented values are assigned to successive data objects. An ordered container identifier is assigned to each container object with the greatest value of the identifiers of the data objects grouped thereto. A metadata structure with an entry for each container objects is stored. Each entry comprises the ordered container identifier and a reference to the corresponding data. The metadata structure is ordered according to the values of the container identifiers. A request to read a data object contains a corresponding data object identifier. It is determined to which container object the data object is grouped, by locating the first container identifier in the metadata structure with a value greater than or equal to that the requested data object.
    Type: Application
    Filed: April 3, 2018
    Publication date: June 20, 2019
    Inventors: Carl Rene D'Halluin, Koen De Keyser
  • Patent number: 10323025
    Abstract: The present invention relates to an improved crystallization procedure to obtain canagliflozin hemihydrate crystals having a narrow particle size distribution by removing a small part of the crystalline suspension in the crystallization vessel from said vessel and subjecting said part to particle size reduction of the formed crystals followed by heating and reintroducting said part of the crystalline suspension again in the crystallization vessel which is kept within a specific temperature range.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: June 18, 2019
    Assignee: Janssen Pharmaceutica NV
    Inventors: Ruben De Keyser, Stijn Laps, Thomas Joachim Landewald Rammeloo, Koen Johan Herman Weerts
  • Patent number: 10241872
    Abstract: There is provided a distributed object storage system that includes several performance optimizations with respect to efficiently storing data objects when coping with a desired concurrent failure tolerance of concurrent failures of storage elements which is greater than two and with respect to optimizing encoding/decoding overhead and the number of input and output operations at the level of the storage elements.
    Type: Grant
    Filed: July 30, 2015
    Date of Patent: March 26, 2019
    Assignee: Amplidata N.V.
    Inventors: Frederik De Schrijver, Bastiaan Stougie, Koen De Keyser, Wim De Wispelaere
  • Patent number: 10216424
    Abstract: A set of encoded data fragments is grouped into a container object in sequential order. Each encoded data fragment is a specific fragment size, and the container object is a specific container object size. The sequential order of the set of encoded data fragments can be tracked in a log in memory, such that the location of any one of the data fragments in the container object can be determined. The container object can be stored directly on a specific backend storage element, without using a file system. A corresponding container object identifier identifies the physical storage location of the container object on the backend storage element. The container object identifier is tracked in the log in memory, such that the physical location on the backend storage element of any specific one of the set of encoded data fragments in the container object can be determined.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: February 26, 2019
    Assignee: Western Digital Technologies, Inc.
    Inventors: Koen De Keyser, Frederik Jacqueline Luc De Schrijver, Stijn Blyweert, Mark Christiaens
  • Publication number: 20190057028
    Abstract: A novel distributed data storage system is disclosed. In an example method, a first plurality of key entries is stored in a first key data store at a first location and a second plurality of key entries is stored in a second key data at a second location. A key entry in comprises a corresponding key having an object identifier, an inverse timestamp, and a source identifier. The method further replicates a set of the first key entries to the second key data store. The method further inserts each first key entry from the set of the first key entries into the second key data store based on the object identifier, the inverse timestamp, and the source identifier of the first key included in that first key entry, the first key entries and the second key entries being interwoven to form a plurality of interwoven ordered key entries.
    Type: Application
    Filed: June 23, 2018
    Publication date: February 21, 2019
    Inventors: Carl Rene D'Halluin, Bastiaan Stougie, Koen De Keyser, Thomas Demoor
  • Publication number: 20190057124
    Abstract: Novel key ticketing technology includes an example method in which a first request associated with a first object storage operation is received. The first request includes a first timestamp associated with the first object storage operation and a first object identifier identifying a first object associated with the first object storage operation. The method calculates a first inverse timestamp based on the first timestamp, and generates a first object key corresponding to the first object storage operation. The first object key includes at least the first object identifier and the first inverse timestamp. The method further inserts a first entry including the first object key into a key data store at a position relative to other object key entries based on the first object identifier and the first inverse timestamp included in the first object key.
    Type: Application
    Filed: May 22, 2018
    Publication date: February 21, 2019
    Inventors: Carl Rene D'Halluin, Bastiaan Stougie, Koen De Keyser, Thomas Demoor
  • Publication number: 20190057027
    Abstract: In an example embodiment, a method comprises determining that a multipart upload request to upload a data object in separate object parts has been received by an object storage service; generating temporary keys for the separate object parts of the data object; storing the temporary keys in a temporary key data store; generating, based on the temporary keys, a multipart key entry for the data object, the multipart key entry comprising a multipart key that contains an object identifier identifying the data object and an inverse timestamp; and inserting the multipart key entry in a persistent key data store storing an ordered set of key entries in a position determined by the object identifier and the inverse timestamp.
    Type: Application
    Filed: June 18, 2018
    Publication date: February 21, 2019
    Inventors: Carl Rene D'Halluin, Bastiaan Stougie, Koen De Keyser, Thomas Demoor
  • Publication number: 20190057120
    Abstract: In an example embodiment, a method comprises determining an ordered set of key entries; determining a first key entry for a first object in the ordered set of key entries; determining an object storage operation represented by a key of the first key entry; determining the object storage operation represented by the key of the first key entry to comprise a delete operation; and responsive to determining the object storage operation represented by the key of the first key entry to comprise the delete operation, skipping over subsequent key entries associated with the first object in the ordered set of key entries.
    Type: Application
    Filed: June 15, 2018
    Publication date: February 21, 2019
    Inventors: Carl Rene D'Halluin, Bastiaan Stougie, Koen De Keyser, Thomas Demoor
  • Publication number: 20190012235
    Abstract: Techniques for distributing data in a distributed data storage system using a hierarchy rule that is generated based on a spreading policy and a set of tolerable failures specified by a user in absence of system deployment information are disclosed. The system includes a controller node which receives a request including a spreading policy and a protection level for spreading a first data object. The controller node determines a hierarchy rule corresponding to the spreading policy based on the protection level. The controller node distributes the first data object in the system using the hierarchy rule and the spreading policy. The controller node receives a reconfiguration of system deployment. The controller node distributes a second data object in the system based on providing protection of the protection level to the second data object without affecting protection of the same protection level applied to the first data object.
    Type: Application
    Filed: September 12, 2018
    Publication date: January 10, 2019
    Inventors: Koen De Keyser, Frederik Jacqueline Luc De Schrijver, Stijn Blyweert
  • Patent number: 10133616
    Abstract: There is provided a distributed object storage system that includes several performance optimizations with respect to efficiently storing data objects when coping with a desired concurrent failure tolerance of concurrent failures of storage elements which is greater than two and with respect to optimizing encoding/decoding overhead and the number of input and output operations at the level of the storage elements.
    Type: Grant
    Filed: May 9, 2017
    Date of Patent: November 20, 2018
    Assignee: Western Digital Technologies, Inc.
    Inventors: Frederik De Schrijver, Bastiaan Stougie, Koen De Keyser