公开(公告)号：US11086536B2

公开(公告)日：2021-08-10

申请号：US16048637

申请日：2018-07-30

Applicant: EMC IP Holding Company LLC

Inventor： Peng Yin ,  Kunxiu Gao ,  Jiahui Wang ,  Seema G. Pai ,  Ningdong Li ,  Daohong Wang ,  Stephen Richard Ives ,  Li Lang

IPC: G06F3/06

Abstract: Techniques for performing configuration may include: determining an initial distribution of logical devices among disk adapters, wherein the initial distribution assigns each logical device a designated disk adapter as a primary active disk adapter servicing I/Os directed to the logical device, wherein the logical devices have storage provisioned from a RAID group including physical storage devices, wherein the disk adapters concurrently issue I/Os to each of the physical storage devices; detecting a configuration change; and responsive to detecting a configuration change, performing first processing. The first processing may include determining, in accordance with the configuration change, a redistribution of the logical devices among the disk adapters; and draining pending I/Os. The configuration change may include adding or removing a logical device provisioned from the RAID group. Performing a first operation on a storage device of the RAID group may include synchronous draining of I/Os of the storage device.

公开(公告)号：US11733994B2

公开(公告)日：2023-08-22

申请号：US16403307

申请日：2019-05-03

Applicant: EMC IP Holding Company LLC

Inventor： Jonathan I. Krasner ,  Li Lang ,  Avraham Goldin

IPC: G06F9/44 ,  G06F8/654

CPC classification number: G06F8/654

Abstract: A data processing device for providing data storage services includes memory, persistent storage, and a device manager. The persistent storage stores a code repository. The state manager obtains a code update request for a new state for the device manager; injects state manager code to begin execution of the state manager in response to obtaining the code update request; updates the device manager data using the code repository and a memory region state map to obtain an updated device manager; and extracts the state manager code to resume execution of the updated device manager.

公开(公告)号：US20200348922A1

公开(公告)日：2020-11-05

申请号：US16403307

申请日：2019-05-03

Applicant: EMC IP Holding Company LLC

Inventor： Jonathan I. Krasner ,  Li Lang ,  Avraham Goldin

IPC: G06F8/654

Abstract: A data processing device for providing data storage services includes memory, persistent storage, and a device manager. The persistent storage stores a code repository. The state manager obtains a code update request for a new state for the device manager; injects state manager code to begin execution of the state manager in response to obtaining the code update request; updates the device manager data using the code repository and a memory region state map to obtain an updated device manager; and extracts the state manager code to resume execution of the updated device manager.

公开(公告)号：US20200034059A1

公开(公告)日：2020-01-30

申请号：US16048637

申请日：2018-07-30

Applicant: EMC IP Holding Company LLC

Inventor： Peng Yin ,  Kunxiu Gao ,  Jiahui Wang ,  Seema G. Pai ,  Ningdong Li ,  Daohong Wang ,  Stephen Richard Ives ,  Li Lang

IPC: G06F3/06

Abstract: Techniques for performing configuration may include: determining an initial distribution of logical devices among disk adapters, wherein the initial distribution assigns each logical device a designated disk adapter as a primary active disk adapter servicing I/Os directed to the logical device, wherein the logical devices have storage provisioned from a RAID group including physical storage devices, wherein the disk adapters concurrently issue I/Os to each of the physical storage devices; detecting a configuration change; and responsive to detecting a configuration change, performing first processing. The first processing may include determining, in accordance with the configuration change, a redistribution of the logical devices among the disk adapters; and draining pending I/Os. The configuration change may include adding or removing a logical device provisioned from the RAID group. Performing a first operation on a storage device of the RAID group may include synchronous draining of I/Os of the storage device.