公开(公告)号：US11720274B2

公开(公告)日：2023-08-08

申请号：US17166009

申请日：2021-02-03

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Ayman Abouelwafa ,  Murali Vaddagiri

IPC: G06F3/00 ,  G06F3/06

CPC classification number: G06F3/0647 ,  G06F3/0604 ,  G06F3/065 ,  G06F3/067 ,  G06F3/0629 ,  G06F3/0683

Abstract: In some examples, for migrating data from a first storage system to a second storage system, a system creates a proxy at the first storage system to direct write requests received at the first storage system to the second storage system, initially sets a cache in the first storage system to a first state in which the cache stores write data for first write requests, and changes a state of the cache from the first state to a second state in which write data for second write requests bypasses the cache and are directed by the proxy to the second storage system.

公开(公告)号：US11693565B2

公开(公告)日：2023-07-04

申请号：US17444776

申请日：2021-08-10

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Ayman Abouelwafa

IPC: G06F3/06

CPC classification number: G06F3/0619 ,  G06F3/067 ,  G06F3/0622 ,  G06F3/0659

Abstract: In some examples, a system detects recovery, from an unavailable state, of a communication link between a first storage system that includes a first storage volume and a second storage system that includes a second storage volume that is to be a synchronized version of the first storage volume, where while the communication link is in the unavailable state the second storage volume is in an offline state and the first storage volume is in an online state. In response to detecting the recovery of the communication link, the system sends a first tracking metadata for the first storage volume from the first storage system to the second storage system, and in response to receipt of the first tracking metadata at the second storage system that maintains a second tracking metadata for the second storage volume, the system transitions the second storage volume from the offline state to a controlled online state, and initiates a synchronization process to synchronize the second storage volume with the first storage volume.

公开(公告)号：US20220091770A1

公开(公告)日：2022-03-24

申请号：US17025080

申请日：2020-09-18

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Ayman Abouelwafa ,  Murali Vaddagiri

IPC: G06F3/06

Abstract: In some examples, a system transfers, in a first transfer operation, data of a first storage volume of a first storage location to a second storage volume for a second storage location. Responsive to a completion of the transfer of data of the first storage volume to the second storage volume, the system activates tracking information to track changes to data portions of the second storage volume, the tracking information comprising a plurality of indicators that map to respective different data portions of the second storage volume. As part of a second transfer operation following the first transfer operation, the system transfers changed data indicated by the tracking information from the second storage volume to the first storage volume, without transferring unchanged data in the second storage volume to the first storage volume.

公开(公告)号：US10732903B2

公开(公告)日：2020-08-04

申请号：US15964744

申请日：2018-04-27

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Ayman Abouelwafa ,  Sheridan Clark Kooyers

IPC: G06F3/06

Abstract: A sub-LUN ownership mapping for multiple storage controllers of a first storage array is generated. The sub-LUN ownership mapping indicates ownership of sub-LUNs by the multiple storage controllers of the first storage array. The sub-LUN ownership mapping is transmitted to a storage controller of a second storage array. A request to align sub-ownership is sent to the storage controller of the second storage array. Ownership is aligned for one or more sub-LUNS for multiple storage controllers of the second storage array.

公开(公告)号：US10452503B2

公开(公告)日：2019-10-22

申请号：US15721284

申请日：2017-09-29

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Ayman Abouelwafa ,  Douglas L Voigt ,  Alex Veprinsky

IPC: G06F12/00 ,  G06F11/20 ,  G06F3/06 ,  H04L29/08 ,  G06F11/14

Abstract: An example data storage system includes a first storage array having a first LUN and a second storage array having a second LUN. The first and second storage arrays may implement replication from the first LUN as a primary LUN to the second LUN as a secondary LUN. The first and second LUNs may both be an active target for host write I/O. The second storage array may, in response to receiving from a host a write that is directed to the second LUN, send write data of the write to the first storage for replication array while maintaining a copy of the write data in a fenced portion of a cache of the second storage array. The second storage array may wait to release the copy of the write data to the second LUN until a write acknowledgment is received from the first storage array.