公开(公告)号：US11526401B2

公开(公告)日：2022-12-13

申请号：US16886840

申请日：2020-05-29

Applicant: EMC IP HOLDING COMPANY LLC

Inventor： Nicholas Von Hein ,  Michael Ferrari ,  Daryl Kinney ,  Shakil Anwar ,  Tao Tao

IPC: G06F16/11 ,  G06F11/14

Abstract: Targetless snapshot schedules are defined by policy objects that include a snap creation interval, maximum snap count, and schedule ID. Multiple schedule IDs can be associated with a single storage object to implement different concurrent targetless snapshot schedules with a single storage object. Multiple storage objects may use the same targetless snapshot schedule independently. Because the targetless snapshot schedules are implemented independently, discard of old snapshots to maintain a snap count for a first storage object does not cause discard of snapshots for a second storage object. Further, discard of old snapshots to maintain a snap count for a first schedule does not cause discard of snapshots for a second schedule applied to the same storage object.

公开(公告)号：US20210374007A1

公开(公告)日：2021-12-02

申请号：US16886840

申请日：2020-05-29

Applicant: EMC IP HOLDING COMPANY LLC

Inventor： Nicholas Von Hein ,  Michael Ferrari ,  Daryl Kinney ,  Shakil Anwar ,  Tao Tao

IPC: G06F11/14 ,  G06F16/11

Abstract: Targetless snapshot schedules are defined by policy objects that include a snap creation interval, maximum snap count, and schedule ID. Multiple schedule IDs can be associated with a single storage object to implement different concurrent targetless snapshot schedules with a single storage object. Multiple storage objects may use the same targetless snapshot schedule independently. Because the targetless snapshot schedules are implemented independently, discard of old snapshots to maintain a snap count for a first storage object does not cause discard of snapshots for a second storage object. Further, discard of old snapshots to maintain a snap count for a first schedule does not cause discard of snapshots for a second schedule applied to the same storage object.

公开(公告)号：US11762807B2

公开(公告)日：2023-09-19

申请号：US17154332

申请日：2021-01-21

Applicant: EMC IP HOLDING COMPANY LLC

Inventor： John Copley ,  Daryl Kinney ,  Tao Tao ,  Shakil Anwar ,  Michael Ferrari ,  Nicholas von Hein

IPC: G06F16/11 ,  G06F16/14

CPC classification number: G06F16/128 ,  G06F16/14

Abstract: Snapsets containing snapshots from a group of storage volumes are assigned snapset IDs. The same snapset ID is applied to each snapshot of the snapset, and is a globally unique value within the storage system. The snapset ID is assigned to a snapshot upon creation, and remains the same regardless of creation or deletion of other snapshots on the storage volume. By assigning a snapset ID to each snapshot of the snapset, and maintaining the snapset ID as a constant value as long as the snapshot is maintained on the storage system, it is possible to easily determine which snapshots form a given snapset. Control operations on particular storage groups or across storage groups are implemented by specifying particular actions to be taken on snapsets or snapshots, which are identified using the snapset IDs.

公开(公告)号：US20220229806A1

公开(公告)日：2022-07-21

申请号：US17154332

申请日：2021-01-21

Applicant: EMC IP HOLDING COMPANY LLC

Inventor： John Copley ,  Daryl Kinney ,  Tao Tao ,  Shakil Anwar ,  Michael Ferrari ,  Nicholas von Hein

IPC: G06F16/11 ,  G06F16/14

Abstract: Snapsets containing snapshots from a group of storage volumes are assigned snapset IDs. The same snapset ID is applied to each snapshot of the snapset, and is a globally unique value within the storage system. The snapset ID is assigned to a snapshot upon creation, and remains the same regardless of creation or deletion of other snapshots on the storage volume. By assigning a snapset ID to each snapshot of the snapset, and maintaining the snapset ID as a constant value as long as the snapshot is maintained on the storage system, it is possible to easily determine which snapshots form a given snapset. Control operations on particular storage groups or across storage groups are implemented by specifying particular actions to be taken on snapsets or snapshots, which are identified using the snapset IDs.

公开(公告)号：US20210374096A1

公开(公告)日：2021-12-02

申请号：US16886848

申请日：2020-05-29

Applicant: EMC IP HOLDING COMPANY LLC

Inventor： Nicholas Von Hein ,  Michael Ferrari ,  Daryl Kinney ,  Shakil Anwar ,  Tao Tao

IPC: G06F16/11

Abstract: Targetless snapshots that are in use are excluded from discard and exempted from inclusion against a snapshot retention count limit. Snapshots that are linked to a target volume are considered to be in use. Snapshots having a persist attribute set are considered to be in use. Snapshots having an expiration attribute set are considered to be in use until at least the expiration time. Snapshots having an age limit attribute set are considered to be in use until reaching at least the specified age. The snapshot retention count limit can be updated with a command. Other commands discard snapshots created before a specified time or older than a specified age, provided the snapshots are not in use. A terminate all command prompts discard of all snapshots that are not in use.

公开(公告)号：US11429559B2

公开(公告)日：2022-08-30

申请号：US16886848

申请日：2020-05-29

Applicant: EMC IP HOLDING COMPANY LLC

Inventor： Nicholas Von Hein ,  Michael Ferrari ,  Daryl Kinney ,  Shakil Anwar ,  Tao Tao

IPC: G06F16/11

Abstract: Targetless snapshots that are in use are excluded from discard and exempted from inclusion against a snapshot retention count limit. Snapshots that are linked to a target volume are considered to be in use. Snapshots having a persist attribute set are considered to be in use. Snapshots having an expiration attribute set are considered to be in use until at least the expiration time. Snapshots having an age limit attribute set are considered to be in use until reaching at least the specified age. The snapshot retention count limit can be updated with a command. Other commands discard snapshots created before a specified time or older than a specified age, provided the snapshots are not in use. A terminate all command prompts discard of all snapshots that are not in use.