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.

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.