公开(公告)号：US09946485B1

公开(公告)日：2018-04-17

申请号：US15386042

申请日：2016-12-21

Applicant: EMC IP HOLDING COMPANY LLC

Inventor： Arieh Don ,  Slavik Neymer ,  Jehuda Shemer ,  Alexandra Solan ,  Valerie Lotosh

IPC: G06F3/06

CPC classification number: G06F3/064 ,  G06F3/0617 ,  G06F3/0619 ,  G06F3/065 ,  G06F3/067 ,  G06F11/14

Abstract: A changed block bitmap of a volume of storage is represented by a data marker that includes an offset to a first dirty block and an offset to a last dirty block. The blocks between the first and last dirty blocks are represented by contiguous clean block identifiers, contiguous dirty block identifiers, and contiguous mixed clean and dirty block identifiers. The contiguous clean block identifiers and contiguous dirty block identifiers use one or two bits to indicate identifier type. The remaining bits indicate a numerical count of contiguous clean or dirty blocks. The contiguous mixed clean and dirty block identifiers may use one bit per block to indicate change status. The data marker may be smaller than a corresponding changed block bitmap.

公开(公告)号：US10802919B1

公开(公告)日：2020-10-13

申请号：US15395124

申请日：2016-12-30

Applicant: EMC IP Holding Company LLC

Inventor： Kfir Wolfson ,  Alexandra Solan ,  Jehuda Shemer ,  Slavik Neymer ,  Valerie Lotosh ,  Assaf Natanzon

IPC: G06F11/14 ,  G06F16/11

Abstract: Methods and apparatus are provided for consistency group replication with reduced resource consumption. An exemplary method comprises: obtaining, by one or more first replication appliances at a first location, one of (i) data generated by a monitored application; and (ii) metadata for each write operation generated by the monitored application, wherein a splitter function provides the data or metadata to the one or more first replication appliances based on a dynamic determination of whether the monitored application requires replication based on the data or the metadata based on predefined application consistency group type criteria; obtaining, by one or more of the first replication appliances, a snapshot comprising the data associated with each of the write operations since a prior snapshot based on the one of the data and the corresponding metadata; and providing the snapshot to one or more second replication appliances at a different location for storage in a replication journal.

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.

公开(公告)号：US10114582B1

公开(公告)日：2018-10-30

申请号：US15392165

申请日：2016-12-28

Applicant: EMC IP Holding Company LLC

Inventor： Vinay G. Rao ,  Slavik Neymer ,  Arieh Don

IPC: G06F12/00 ,  G06F3/06 ,  G06F11/14

Abstract: A technique for storing data operates a replication splitter in a host computing device. The host computing device runs an application and monitors write performance from the application to both a data storage array and a replication site. If the monitored performance indicates that writes to the replication site would not significantly slow down the application, the replication splitter operates in synchronous mode, in which the splitter waits to acknowledge writes from the application until it receives confirmation of write completion from both the data storage array and the replication site. However, if the monitored performance indicates that writes to the replication site would significantly slow down the application, the replication splitter operates in asynchronous mode, in which the splitter acknowledges writes from the application as soon as it receives confirmation that the data storage array has completed those writes and without waiting for acknowledgements from the replication site.