Patents by Inventor Michael T. Benhase

Michael T. Benhase 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).

  • TIERED CACHING AND MIGRATION IN DIFFERING GRANULARITIES
    Publication number: 20160132273
    Abstract: For data processing in a distributed computing storage environment by a processor device, the distributed computing environment incorporating at least high-speed and lower-speed caches, and managed tiered levels of storage, groups of data segments and clumped hot ones of the data segments are migrated between the tiered levels of storage such that uniformly hot ones of the groups of data segments are migrated to use a Solid State Drive (SSD) portion of the tiered levels of storage; uniformly hot groups of data segments are determined using a first, heat map for a selected one of the group of the data segments; and a second heat map is used to determine the clumped hot groups.
    Type: Application
    Filed: January 18, 2016
    Publication date: May 12, 2016
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Michael T. Benhase, Lokesh M. Gupta, Cheng-Chung Song
  • Performing asynchronous discard scans with staging and destaging operations
    Patent number: 9336151
    Abstract: A controller receives a request to perform staging or destaging operations with respect to an area of a cache. A determination is made as to whether one or more discard scans are being performed or queued for the area of the cache. In response to determining that one or more discard scans are being performed or queued for the area of the cache, the controller avoids satisfying the request to perform the staging or the destaging operations or a read hit with respect to the area of the cache.
    Type: Grant
    Filed: November 6, 2013
    Date of Patent: May 10, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Michael T. Benhase, Lokesh M. Gupta, Matthew J. Kalos
  • Performing asynchronous discard scans with staging and destaging operations
    Patent number: 9335930
    Abstract: A controller receives a request to perform staging or destaging operations with respect to an area of a cache. A determination is made as to whether one or more discard scans are being performed or queued for the area of the cache. In response to determining that one or more discard scans are being performed or queued for the area of the cache, the controller avoids satisfying the request to perform the staging or the destaging operations or a read hit with respect to the area of the cache.
    Type: Grant
    Filed: December 1, 2015
    Date of Patent: May 10, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Michael T. Benhase, Lokesh M. Gupta, Matthew J. Kalos
  • Performing asynchronous discard scans with staging and destaging operations
    Patent number: 9336150
    Abstract: A controller receives a request to perform staging or destaging operations with respect to an area of a cache. A determination is made as to whether one or more discard scans are being performed or queued for the area of the cache. In response to determining that one or more discard scans are being performed or queued for the area of the cache, the controller avoids satisfying the request to perform the staging or the destaging operations with respect to the area of the cache.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: May 10, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Michael T. Benhase, Lokesh M. Gupta, Matthew J. Kalos
  • Automatically Preventing Large Block Writes From Starving Small Block Writes In a Storage Device
    Publication number: 20160124655
    Abstract: A mechanism is provided in a storage device for performing a write operation. The mechanism configures a write buffer memory with a plurality of write buffer portions. Each write buffer portion is dedicated to a predetermined block size category within a plurality of block size categories. For each write operation from an initiator, the mechanism determines a block size category of the write operation. The mechanism performs each write operation by writing to a write buffer portion within the plurality of write buffer portions corresponding to the block size category of the write operation.
    Type: Application
    Filed: January 12, 2016
    Publication date: May 5, 2016
    Inventors: Michael T. Benhase, Andrew D. Walls
  • Use of differing granularity heat maps for caching and migration
    Patent number: 9323687
    Abstract: For data processing in a computing storage environment by a processor device, the computing storage environment incorporating at least high-speed and lower-speed caches, and tiered levels of storage, groups of data segments are migrated between the tiered levels of storage such that uniformly hot ones of the groups of data segments are migrated to utilize a Solid State Drive (SSD) portion of the tiered levels of storage, while sparsely hot ones of the groups of data segments are migrated to utilize the lower-speed cache.
    Type: Grant
    Filed: November 7, 2013
    Date of Patent: April 26, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Michael T. Benhase, Lokesh M. Gupta, Cheng-Chung Song
  • Assigning device adaptors to use to copy source extents to target extents in a copy relationship
    Patent number: 9323464
    Abstract: Provided are a computer program product, system, and method for assigning device adaptors to use to copy source extents in source ranks to target extents in target ranks in a copy relation. A determination is made of an order of the target ranks in the copy relation. Target ranks in the copy relation are selected according to the determined order. For each selected target rank, indication is made in a device adaptor assignment data structure of a source device adaptor and target device adaptor of the device adaptors to use to copy the source rank to the selected target rank indicated in the copy relation, wherein indication is made for the selected target ranks according to the determined order. The source ranks are copied to the selected target ranks using the source and target device adaptors indicated in the device adaptor assignment data structure.
    Type: Grant
    Filed: January 15, 2015
    Date of Patent: April 26, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Michael T. Benhase, Theresa M. Brown, Lokesh M. Gupta, Carol S. Mellgren
  • Systems and methods for background destaging storage tracks
    Patent number: 9323694
    Abstract: Storage tracks from at least one server are destaged from the write cache rank when it is determined that the at least one server is idle with respect to a first set of ranks, and storage tracks are refrained from being destaged from each rank when it is determined that the at least one server is not idle with respect to a second set of ranks such that storage tracks in the first set of ranks may be destaged while storage tracks in the second set of ranks are not being destaged.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: April 26, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Brent C. Beardsley, Michael T. Benhase, Binny S. Gill, Lokesh M. Gupta, Sonny E. Williams
  • Systems and methods for background destaging storage tracks
    Patent number: 9317447
    Abstract: Storage tracks from at least one host are destaged from the write cache rank when it is determined that the at least one host is idle with respect to a first set of ranks, and storage tracks are refrained from being destaged from each rank when it is determined that the at least one host is not idle with respect to a second set of ranks such that storage tracks in the first set of ranks may be destaged while storage tracks in the second set of ranks are not being destaged.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: April 19, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Brent C. Beardsley, Michael T. Benhase, Binny S. Gill, Lokesh M. Gupta, Sonny E. Williams
  • Thinly provisioned flash cache with shared storage pool
    Patent number: 9311253
    Abstract: For data processing in a computing storage environment by a processor device, the computing storage environment incorporating at least high-speed and lower-speed caches, and managed tiered levels of storage, a Solid State Device (SSD) tier is variably shared between the lower-speed cache and the managed tiered levels of storage such that the managed tiered levels of storage are operational on large data segments, and the lower-speed cache is allocated with the large data segments, yet operates with data segments of a smaller size than the large data segments and within the large data segments.
    Type: Grant
    Filed: November 7, 2013
    Date of Patent: April 12, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Michael T. Benhase, Lokesh M. Gupta, Karl Nielsen
  • PERFORMING ASYNCHRONOUS DISCARD SCANS WITH STAGING AND DESTAGING OPERATIONS
    Publication number: 20160085454
    Abstract: A controller receives a request to perform staging or destaging operations with respect to an area of a cache. A determination is made as to whether one or more discard scans are being performed or queued for the area of the cache. In response to determining that one or more discard scans are being performed or queued for the area of the cache, the controller avoids satisfying the request to perform the staging or the destaging operations or a read hit with respect to the area of the cache.
    Type: Application
    Filed: December 1, 2015
    Publication date: March 24, 2016
    Inventors: Michael T. Benhase, Lokesh M. Gupta, Matthew J. Kalos
  • Tiered caching and migration in differing granularities
    Patent number: 9285998
    Abstract: For data processing in a distributed computing storage environment by a processor device, the distributed computing environment incorporating at least high-speed and lower-speed caches, and managed tiered levels of storage, groups of data segments and clumped hot ones of the data segments are migrated between the tiered levels of storage such that uniformly hot ones of the groups of data segments are migrated to use a Solid State Drive (SSD) portion of the tiered levels of storage; uniformly hot groups of data segments are determined using a first, largest granulated, heat map for a selected one of the group of the data segments; and a second heat map, which is smaller than the first and having the largest granularity of the first heat map, is used to determine the clumped hot groups.
    Type: Grant
    Filed: June 22, 2015
    Date of Patent: March 15, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Michael T. Benhase, Lokesh M. Gupta, Cheng-Chung Song
  • Efficient processing of cache segment waiters
    Patent number: 9286227
    Abstract: For a plurality of input/output (I/O) operations waiting to assemble complete data tracks from data segments, a process, separate from a process responsible for the data assembly into the complete data tracks is initiated, and the at least one complete data track is removed off of a free list by a first I/O waiter.
    Type: Grant
    Filed: April 23, 2015
    Date of Patent: March 15, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Kevin J. Ash, Michael T. Benhase, Lokesh M. Gupta, David B. Whitworth
  • Efficient cache volume sit scans
    Patent number: 9280485
    Abstract: A processor, operable in a computing storage environment, allocates portions of a Scatter Index Table (SIT) disproportionately between a larger portion dedicated for meta data tracks, and a smaller portion dedicated for user data tracks, and processes a storage operation through the disproportionately allocated portions of the SIT using an allocated number of Task Control Blocks (TCB).
    Type: Grant
    Filed: November 7, 2013
    Date of Patent: March 8, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Kevin J. Ash, Michael T. Benhase, Lokesh M. Gupta, Kenneth W. Todd
  • Management of partial data segments in dual cache systems
    Patent number: 9274975
    Abstract: For movement of partial data segments within a computing storage environment having lower and higher levels of cache by a processor, a whole data segment containing one of the partial data segments is promoted to both the lower and higher levels of cache, including considering an Input/Output Performance (IOP) metric, a bandwidth metric, and a garbage collection metric, and a whole data segment is promoted containing the one of the partial data segments to both the lower and higher levels of cache.
    Type: Grant
    Filed: June 22, 2015
    Date of Patent: March 1, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Michael T. Benhase, Stephen L. Blinick, Evangelos S. Eleftheriou, Lokesh M. Gupta, Robert Haas, Xiao-Yu Hu, Matthew J. Kalos, Ioannis Koltsidas, Roman A. Pletka
  • ADAPTIVE RECORD CACHING FOR SOLID STATE DISKS
    Publication number: 20160055090
    Abstract: A storage controller receives a request that corresponds to an access of a track. A determination is made as to whether the track corresponds to data stored in a solid state disk. Record staging to a cache from the solid state disk is performed, in response to determining that the track corresponds to data stored in the solid state disk, wherein each track is comprised of a plurality of records.
    Type: Application
    Filed: November 2, 2015
    Publication date: February 25, 2016
    Inventors: Michael T. Benhase, Lokesh M. Gupta, Joseph S. Hyde, II, Lee C. LaFrese
  • FUZZY COUNTERS FOR NVS TO REDUCE LOCK CONTENTION
    Publication number: 20160055091
    Abstract: A method for data management in a computing storage environment includes a processor device, operable in the computing storage environment, that divides a plurality of counters tracking write and discard storage operations through Non Volatile Storage (NVS) space into first, accurate, and second, fuzzy, groups where the first, accurate, group is one of updated on a per operation basis, while the second, fuzzy, group is one of updated on a more infrequent basis as compared to the first, accurate group.
    Type: Application
    Filed: November 4, 2015
    Publication date: February 25, 2016
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Kevin J. ASH, Michael T. BENHASE, Lokesh M. GUPTA, Kenneth W. TODD
  • ADAPTIVE RECORD CACHING FOR SOLID STATE DISKS
    Publication number: 20160055092
    Abstract: A storage controller receives a request that corresponds to an access of a track. A determination is made as to whether the track corresponds to data stored in a solid state disk. Record staging to a cache from the solid state disk is performed, in response to determining that the track corresponds to data stored in the solid state disk, wherein each track is comprised of a plurality of records.
    Type: Application
    Filed: November 2, 2015
    Publication date: February 25, 2016
    Inventors: Michael T. Benhase, Lokesh M. Gupta, Joseph S. Hyde, II, Lee C. LaFrese
  • Adjustment of destage rate based on read and write response time requirements
    Patent number: 9262321
    Abstract: A storage controller that includes a cache receives a command from a host, wherein a set of criteria corresponding to read and write response times for executing the command have to be satisfied. The storage controller determines ranks of a first type and ranks of a second type corresponding to a plurality of volumes coupled to the storage controller, wherein the command is to be executed with respect to the ranks of the first type. Destage rate corresponding to the ranks of the first type are adjusted to be less than a default destage rate corresponding to the ranks of the second type, wherein the set of criteria corresponding to the read and write response times for executing the command are satisfied.
    Type: Grant
    Filed: November 17, 2011
    Date of Patent: February 16, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Michael T. Benhase, Lokesh M. Gupta, Christopher J. Strauss, Will A. Wright
  • Use of flash cache to improve tiered migration performance
    Patent number: 9262088
    Abstract: For data processing in a computing storage environment by a processor device, the computing storage environment incorporating at least high-speed and lower-speed caches, and tiered levels of storage, and at a time in which at least one data segment is to be migrated from one level to another level of the tiered levels of storage, a data migration mechanism is initiated by copying data resident in the lower-speed cache corresponding to the at least one data segment to be migrated to a target on the another level, and reading remaining data, not previously copied from the lower-speed cache, from a source on the one level, and writing the remaining data to the target.
    Type: Grant
    Filed: October 29, 2013
    Date of Patent: February 16, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Michael T. Benhase, Lokesh M. Gupta