Patents by Inventor Hao T. Chang

Hao T. Chang 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).

  • Allocating storage for virtual machine instances based on input/output (I/O) usage rate of the disk extents stored in an I/O profile of a previous incarnation of the virtual machine
    Patent number: 9411627
    Abstract: A method, system and computer program product for allocating storage for virtual machine instances. The input/output (I/O) usage of disk extents utilized by a virtual machine is saved in an I/O profile of the virtual machine. In response to deallocating the virtual machine, the I/O usage of the disk extents is extracted from its I/O profile and saved in a data structure. Upon starting a new instance of the virtual machine, new disk extents are allocated to the new virtual machine instance. The I/O usage of the disk extents for the previous incarnation of the virtual machine is applied to the disk extents allocated to the new virtual machine instance. The newly allocated disk extents can now be placed in either a solid-state drive device or a hard disk drive device based on this I/O history without requiring a twenty-four hour long cycle.
    Type: Grant
    Filed: July 18, 2014
    Date of Patent: August 9, 2016
    Assignee: International Business Machines Corporation
    Inventors: Hao T. Chang, Catherine C. Diep, Harold H. Hall, Jr.
  • ALLOCATING STORAGE FOR VIRTUAL MACHINE INSTANCES BASED ON INPUT/OUTUPT (I/O) USAGE RAGE OF THE DISK EXTENTS STORED IN AN I/O PROFILE OF A PREVIOUS INCARNATION OF THE VIRTUAL MACHINE
    Publication number: 20160019080
    Abstract: A method, system and computer program product for allocating storage for virtual machine instances. The input/output (I/O) usage of disk extents utilized by a virtual machine is saved in an I/O profile of the virtual machine. In response to deallocating the virtual machine, the I/O usage of the disk extents is extracted from its I/O profile and saved in a data structure. Upon starting a new instance of the virtual machine, new disk extents are allocated to the new virtual machine instance. The I/O usage of the disk extents for the previous incarnation of the virtual machine is applied to the disk extents allocated to the new virtual machine instance. The newly allocated disk extents can now be placed in either a solid-state drive device or a hard disk drive device based on this I/O history without requiring a twenty-four hour long cycle.
    Type: Application
    Filed: July 18, 2014
    Publication date: January 21, 2016
    Inventors: Hao T. Chang, Catherine C. Diep, Harold H. Hall, JR.