公开(公告)号：GB2580263B

公开(公告)日：2021-11-17

申请号：GB202004106

申请日：2018-08-20

Applicant: IBM

Inventor： LOKESH M GUPTA ,  MATTHEW BORLICK

IPC: G06F3/06

Abstract: An example method for dynamic data relocation using cloud based ranks comprises monitoring accesses to data stored on a plurality of local ranks of an enterprise storage system; identifying data which has not been accessed for a predetermined amount of time based on the monitored accesses; and moving the data which has not been accessed for the predetermined amount of time to one or more cloud based ranks of the enterprise storage system, wherein each cloud based rank comprises storage space on one or more cloud storage devices, the storage space on the one or more cloud storage devices mapped to corresponding virtual local addresses that are grouped as a virtual local rank.

公开(公告)号：GB2579329A

公开(公告)日：2020-06-17

申请号：GB202003615

申请日：2018-08-10

Applicant: IBM

Inventor： LOKESH M GUPTA ,  KEVIN JOHN ASH ,  KYLER ANDERSON

IPC: G06F12/0895 ,  G06F12/123

Abstract: A list of a first type of tracks in a cache is generated. A list of a second type of tracks in the cache is generated, wherein I/O operations are completed relatively faster to the first type of tracks than to the second type of tracks. A determination is made as to whether to demote a track from the list of the first type of tracks or from the listof the second type of tracks.

公开(公告)号：GB2580263A

公开(公告)日：2020-07-15

申请号：GB202004106

申请日：2018-08-20

Applicant: IBM

Inventor： LOKESH M GUPTA ,  MATTHEW BORLICK

IPC: G06F12/08

Abstract: An example method for dynamic data relocation using cloud based ranks comprises monitoring accesses to data stored on a plurality of local ranks of an enterprise storage system; identifying data which has not been accessed for a predetermined amount of time based on the monitored accesses; and moving the data which has not been accessed for the predetermined amount of time to one or more cloud based ranks of the enterprise storage system, wherein each cloud based rank comprises storage space on one or more cloud storage devices, the storage space on the one or more cloud storage devices mapped to corresponding virtual local addresses that are grouped as a virtual local rank.

公开(公告)号：GB2580259A

公开(公告)日：2020-07-15

申请号：GB202004071

申请日：2018-08-20

Applicant: IBM

Inventor： LOKESH M GUPTA ,  MATTHEW BORLICK

IPC: G06F12/08

Abstract: A computer-implemented method for thin provisioning using cloud based ranks comprises determining a total amount of unused physical storage space for all of a plurality of local ranks associated with a storage controller; comparing the total amount of unused physical storage space to a first threshold; in response to determining that the total amount of unused physical storage space is less than the first threshold, creating one or more cloud based ranks. Creating each of the one or more cloud based ranks comprises allocating storage space on one or more corresponding cloud storage devices via a cloud interface; mapping the allocated storage space to corresponding virtual local addresses; and grouping the virtual local addresses as a virtual local rank associated with the storage controller.

公开(公告)号：GB2579329B

公开(公告)日：2020-12-16

申请号：GB202003615

申请日：2018-08-10

Applicant: IBM

Inventor： LOKESH M GUPTA ,  KEVIN JOHN ASH ,  KYLER ANDERSON

IPC: G06F12/0895 ,  G06F12/123

Abstract: A list of a first type of tracks in a cache is generated. A list of a second type of tracks in the cache is generated, wherein I/O operations are completed relatively faster to the first type of tracks than to the second type of tracks. A determination is made as to whether to demote a track from the list of the first type of tracks or from the list of the second type of tracks.

公开(公告)号：GB2532400B

公开(公告)日：2020-06-03

申请号：GB201603638

申请日：2014-07-28

Applicant: IBM

Inventor： MICHAEL T BENHASE ,  LOKESH M GUPTA ,  TRUNG N NGUYEN ,  DAVID B WHITWORTH

IPC: G06F9/52

公开(公告)号：GB2580259B

公开(公告)日：2022-02-23

申请号：GB202004071

申请日：2018-08-20

Applicant: IBM

Inventor： LOKESH M GUPTA ,  MATTHEW BORLICK

IPC: G06F3/06 ,  G06F12/08 ,  H04L67/1097

Abstract: A computer-implemented method for thin provisioning using cloud based ranks comprises determining a total amount of unused physical storage space for all of a plurality of local ranks associated with a storage controller; comparing the total amount of unused physical storage space to a first threshold; in response to determining that the total amount of unused physical storage space is less than the first threshold, creating one or more cloud based ranks. Creating each of the one or more cloud based ranks comprises allocating storage space on one or more corresponding cloud storage devices via a cloud interface; mapping the allocated storage space to corresponding virtual local addresses; and grouping the virtual local addresses as a virtual local rank associated with the storage controller.

公开(公告)号：GB2532400A

公开(公告)日：2016-05-18

申请号：GB201603638

申请日：2014-07-28

Applicant: IBM

Inventor： MICHAEL T BENHASE ,  LOKESH M GUPTA ,  TRUNG N NGUYEN ,  DAVID B WHITWORTH

IPC: G06F9/52

Abstract: For efficient task scheduling using a locking mechanism, a new task is allowed to spin on the locking mechanism if a number of tasks spinning on the locking mechanism is less than a predetermined threshold for parallel operations requiring locks between the multiple threads.