公开(公告)号：US10462012B1

公开(公告)日：2019-10-29

申请号：US15282066

申请日：2016-09-30

Applicant: EMC IP Holding Company LLC

Inventor： Vinay Rao ,  Xiali He ,  Subin George ,  Arieh Don

IPC: G06F15/173 ,  H04L12/24 ,  G06F3/06 ,  G06F16/21 ,  H04L29/08

Abstract: A data storage system migrates a device between a storage array and a cloud gateway based on monitored conditions such as access frequency. More particularly, both a logical volume and the associated data are migrated. The unique device ID (e.g. and without limitation the WWN or WWID) is maintained after migration so the migration is transparent to the host application. The device is deleted from the migration source after being moved to the migration target, thereby releasing resources such as memory, storage, processor cycles and bandwidth at the migration source. A multi-path IO driver in the host computer coordinates with a tiering program in the storage array and a monitoring program in the cloud gateway to manage migration of the logical volume.

公开(公告)号：US10007466B1

公开(公告)日：2018-06-26

申请号：US15283856

申请日：2016-10-03

Applicant: EMC IP Holding Company LLC

Inventor： David Meiri ,  Xiali He ,  Sathyanarayan Jaganathan

IPC: G06F12/00 ,  G06F3/06 ,  G06F13/00 ,  G06F13/28

CPC classification number: G06F3/065 ,  G06F3/0619 ,  G06F3/0644 ,  G06F3/0659 ,  G06F3/067 ,  G06F11/1448 ,  G06F11/2064

Abstract: Maintaining a set of extents corresponding to a portion of an initial logical volume that is to be copied includes initializing a table having entries corresponding to different portions of the initial logical volume, where each of the entries is initialized with a first value, following initializing the table, providing a second value different from the first value to an entry in the table corresponding to a portion of the initial logical volume to which a write operation is performed and establishing the set of extents, where the first value is provided to entries in the table that correspond to portions of the initial logical device indicated by the extents. Data of the initial logical volume corresponding to the set of extents may be copied to at least one other logical volume.

公开(公告)号：US10459806B1

公开(公告)日：2019-10-29

申请号：US15491230

申请日：2017-04-19

Applicant: EMC IP HOLDING COMPANY LLC

Inventor： Xiali He ,  John W. Bates ,  Slavik Neymer ,  Arieh Don

IPC: G06F11/00 ,  G06F11/16 ,  G06F3/06 ,  G06F12/10 ,  G06F11/20

Abstract: A cloud storage replica of a production device is created and asynchronously updated. A snap, clone or portion of the replica is copied to a cloud gateway in a failover situation. Access to replica images may be obtained via other cloud gateways.