Emc Corporation

Emx Corporation

Zoran Cakeljic

Yuval Ofek

Stephen J Todd

Steven M Blumenau

Dan Arnon

Samuel Krikler

Sharon Galtzur

Michael Hirsch

Haim Bitner

John Philip Bell, Ii

Donagh A Buckley

Nadav Kedem

Conor Fox

Philip E Tamer

Mathieu Gagne

Peter Kamvysselis

Ariel J Ish-Shalom

Methods and apparatus for performing a data migration in a clustered computer system. In one aspect, the availability of the data being migrated is maintained during the migration. In another aspect, a data set is migrated by a transfer utility in one of the hosts in the cluster, and in response to a failure of the host, the migration is resumed without restarting from the beginning point of the data set. In a further embodiment, the hosts in the cluster have agents associated therewith to manage the data migration, and prior to taking at least one action associated with the data migration, the agents coordinate to ensure that the hosts in the cluster are prepared to have the at least one action taken.

Method and apparatus for migrating data in a clustered computer system environment

Methods and apparatus for migrating a logical object. In one embodiment, a migration is performed by automatically determining the source location(s) of the logical object, moving the data stored therein to a target location while maintaining the availability of the data at the source location to an application program, and automatically servicing access requests from the application program at the target location after moving the data. In another embodiment, a migration is performed by automatically provisioning target location(s) to store a logical object, moving the data in the logical object to the target location(s) while maintaining its availability to an application program, and automatically servicing access requests from the application program at the target location after moving the data. In a further embodiment, a migration is performed by moving the data within a logical object from a source logical volume to a target logical volume, automatically servicing access requests from an application program at the target logical volume after moving the data, and retiring the source logical volume.

Method and apparatus for migrating data and automatically provisioning a target for the migration

Method and apparatus for migrating data in a computer system

Method and apparatus are disclosed for a computer system including host computers and storage elements. The host computers may be configured into a host domain and the storage elements configured into a storage domain. The storage domain includes a plurality of primary storage devices and a secondary storage device. The secondary storage device may be coupled to a plurality of the primary storage devices through a network. In another embodiment, the secondary storage device may send and receive information from a heterogeneous set of host computers. In another embodiment, connections for transfer of data onto the secondary storage element are created automatically.

Apparatus and methods for operating a computer storage system

Method and apparatus for managing migration of data in a clustered computer system environment

Method and apparatus are disclosed for copying and backing up logical objects in a computer storage system. The logical objects are comprised of data blocks. The data blocks may be copied in any order. The data blocks may be copied or written from a storage media, such as a tape, in parallel.

Apparatus and methods for copying, backing up and restoring logical objects in a computer storage system by transferring blocks out of order or in parallel

Method and apparatus for copying, transferring, backing up and restoring data are disclosed. The data can be copied, backed up or restored in segments sizes larger than the data blocks which comprise a logical object. In some embodiments, the segment can correspond to a track of a primary storage device and the data blocks to a fixed size block. In some instances, copying, storage and transfer of the segments which include multiple data blocks can result in transfer of a data block not in a logical object.

Apparatus and methods for copying, backing up, and restoring data using a backup segment size larger than the storage block size

Method and apparatus for generating partial backups of logical objects in a computer storage system are disclosed. Changed data blocks are identified and stored as differential abstract block sets. The differential abstract block set may include data blocks in any order and metadata identifying the relative position of the data block in the logical object. The invention includes methods for formatting updated backups using the differential backups.

Apparatus and method for differential backup and restoration of data in a computer storage system

Method and apparatus for restoring copies of a logical object to a primary computer storage device are disclosed. A copy of the logical object is provided, physical blocks of memory in the primary storage device are allocated, a map of the data blocks will be copied to the physical blocks of the primary storage devices created. The copying may then occur using the created map. The copy of the logical object may be an abstract bloc set, which includes data blocks of the logical object potentially out of order and metadata identifying relative position of the data blocks.

Apparatus and methods for copying a logical object to a primary storage device using a map of storage locations

Growing community of inventors

Newton, MA, United States of America

Zoran Cakeljic