公开(公告)号：US20180004593A1

公开(公告)日：2018-01-04

申请号：US15199128

申请日：2016-06-30

Applicant: VMware, Inc.

Inventor： Enning Xiang ,  Eric Knauft ,  Pascal Renauld ,  Xin Li

IPC: G06F11/10 ,  G06F3/06

CPC classification number: G06F11/1004 ,  G06F3/0619 ,  G06F3/064 ,  G06F3/0683

Abstract: Systems and techniques are described for transferring data. A described technique includes receiving a request to transmit a data block from a first data storage device to a second data storage device. An attempt to read the data block from the first data storage device is made. A media error resulting from the attempt to read the data block from the first data storage device is detected. In response to detecting the media error, a new data block is generated and includes mismatched checksum data that causes a checksum mismatched error when the new data block is accessed. The new data block is transmitted for storage at the second data storage device in place of the data block.

公开(公告)号：US09830234B2

公开(公告)日：2017-11-28

申请号：US14469526

申请日：2014-08-26

Applicant: VMware, Inc.

Inventor： William Earl ,  Christos Karamanolis ,  Eric Knauft ,  Pascal Renauld

IPC: G06F17/00 ,  G06F11/14 ,  H04L29/08 ,  G06F17/30 ,  G06F9/455

CPC classification number: G06F11/1471 ,  G06F17/30171 ,  G06F17/30191 ,  G06F17/30371 ,  G06F2009/45579 ,  H04L67/1097

Abstract: Embodiments of the disclosure provide techniques for updating a distributed transaction log on a previously offline resource object component using distributed transaction logs from active host computer nodes from separate RAID mirror configurations. Each component object maintains a journal (log) where distributed transactions are recorded. If a component object goes offline and subsequently returns (e.g., if the node hosting the component object reboots), the component object is marked as stale. To return the component object to an active state, a distributed resources module retrieves the journals from other resource component objects from other RAID configurations where the data is mirrored. The module filters corresponding data that is missing in the journal of the previously offline corresponding object and merges the filtered data to the journal.