US 10,852,982 B2Granted

Method, system, and computer program product for managing storage system

AssigneeEMC IP Holding Company LLC

InventorsJamin Kang, Geng Han, Jibing Dong, Ree Sun, Hongpo Gao

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Abstract

Implementations of the present disclosure relate to a method, system and computer program product for managing a storage system. Specifically, in one implementation of the present disclosure there is provided a method for managing a storage system. The method comprises: dividing a source device among a plurality of storage devices in the storage system into a plurality of extents; copying data in the plurality of extents to a destination device; determining the state of an extent among the plurality of extents on the basis whether data in the extent among the plurality of extents has been copied to the destination device; and managing an access request to the extent on the basis of the state of the extent. In other implementations of the present disclosure, there is provided a corresponding system and computer program product.

Claims18

Dependent claims

A method for managing a storage system, the method comprising:

dividing a source storage device of a plurality of persistent storage devices in the storage system into a plurality of extents, the plurality of persistent storage devices including a group of persistent storage devices arranged in a Redundant Array of Independent Drives (RAID) configuration, the group including the source storage device;
in response to the source storage device reaching an end-of-life condition while the source storage device continues to operate, proactively copying data in the plurality of extents to a destination storage device of the plurality of persistent storage devices;
while continuing to copy the data in the plurality of extents, determining a copy status of an extent among the plurality of extents on the basis of whether all data in that extent has yet been copied to the destination storage device;
selectively fulfilling an access request to that extent using one of the source storage device and the destination storage device on the basis of the copy status of that extent;
and
in response to data in all of the plurality of extents having been copied to the destination storage device:
removing the source storage device from the group arranged in the RAID configuration;
and
adding the destination storage device to the group arranged in the RAID configuration in place of the removed source storage device.

6 more elements

A system for managing a storage system, comprising:

one or more processors;
a memory coupled to at least one processor of the one or more processors;
and
computer program instructions stored in the memory which, when executed by the at least one processor, cause the system to execute a method for managing a storage system, the method comprising:
dividing a source storage device among a plurality of persistent storage devices in the storage system into a plurality of extents, the plurality of persistent storage devices includes a group of persistent storage devices arranged in a Redundant Array of Independent Drives (RAID) configuration, the group including the source storage device;
in response to the source storage device reaching an end-of-life condition while the source storage device continues to operate, proactively copying data in the plurality of extents to a destination storage device of the plurality of persistent storage devices;
while continuing to copy the data in the plurality of extents, determining a copy status of an extent among the plurality of extents on the basis whether all data in that extent has yet been copied to the destination storage device;
selectively fulfilling an access request to that extent using one of the source storage device and the destination storage device on the basis of the copy status of that extent;
and
in response to data in all of the plurality of extents having been copied to the destination storage device:
removing the source storage device from the group arranged in the RAID configuration;
and
adding the destination storage device to the group arranged in the RAID configuration in place of the removed source storage device.

10 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/170,236Filed 25 Oct 2018
Priority: CN 2017 1 102328727 Oct 2017
Published: US 2019/0129646 A12 May 2019
Granted: 1 Dec 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

G06F 3/0647
Horizontal data movement in storage systems, i.e. moving data in between storage devices or systems: migration mechanisms
G06F 3/0604
Specifically adapted to achieve a particular effect: improving or facilitating administration, e.g. storage management
G06F 3/0619
Improving the reliability of storage systems: in relation to data integrity, e.g. data losses, bit errors
G06F 3/0644
Organizing or formatting or addressing of data: management of space entities, e.g. partitions, extents, pools