Dell Products Inc.

Netapp, Inc.

Lsi Corporation

Emc IP Holding Company LLC

Gopakumar Ambat

Yask Sharma

Prakash Venkat

G Paul Koning

Giribabu Balaraman

Amihay Azruel

Daniel R Oelke

Vishwanath Nagallingappa Hawargi

Mrutyunjaya Prasad Jali

Vishwanath Nagalingappa Hawargi

Ryan J Thomas

Raghuram Bilugu

Techniques are presented for implementing non-host-based migration in a manner that is not subject to certain types of data corruption. This may be accomplished by preventing any hosts from having write access to a target LUN until it can be confirmed that all applications that access a source LUN have been shut down. This arrangement prevents accidentally writing to the target LUN while the source LUN is still being accessed. As a further precaution, just in case the confirmations are incorrect, a target data storage system can direct a source data storage system to remove access to the source LUN from all of the hosts, which has a similar effect. The migration can then proceed.

Data migration using write protection

A data management method and system for migrating a data volume from a source array to a destination array includes receiving an indication of a source volume to migrate from the source array to the destination array wherein the source volume comprises a clustered volume associated with a plurality of cluster hosts. A path-flip is performed by the host multipath module, to switch the paths between source and destination array. This switch is done in a seamless manner, without disrupting host I/O. The path-flip includes transferring associated metadata from source to destination and can be performed even in clustered and/or multi-host environments. Sanity timers are built-in to ensure that the path-flip completes within a stipulated time-frame and, if not, the path-flip process is aborted and I/O is resumed without any disruption.

Seamless data migration in a clustered environment

A method may include establishing, by a MPIO driver of a host information handling system, an I/O path between the host information handling system and the source storage array as an active I/O path and a path between the host and the target storage array as a passive I/O path. The method may also include performing a snapshot-based iterative replication between the source storage array and the target storage array, wherein successive iterations of the snapshot-based iterative replication comprise I/O to the source storage array occurring during an immediately previous iteration of the snapshot-based iterative replication. The method may further include, upon completion of the snapshot-based iterative replication, establishing, by the MPIO, the I/O path between the host and the source storage array as a passive I/O path and the path between the host and the target storage array as the active I/O path.

Systems and methods for data migration using multi-path input/output and snapshot-based replication

An information handling system may include a processor and a first storage management console comprising a program of executable instructions embodied in non-transitory computer-readable media accessible to the processor, and configured to, when read and executed by the processor: (i) manage input/output between an application and a primary physical storage controller to perform input/output between the application and a storage resource communicatively coupled to primary physical storage container; (ii) asynchronously mirror application-consistent snapshots of data associated with the application from the primary physical storage controller to a storage virtual controller configured to emulate a physical storage controller such that the storage virtual controller stores the snapshots to remote storage geographically remote from the information handling system; (iii) store metadata associated with the application and data stored to the storage resource and the remote storage; and (iv) copy the metadata to a second storage management console executing on a second information handling system geographically remote from the information handling system.

Systems and methods for application-consistent disaster recovery using a virtual storage controller and remote storage

A system and method for application aware de-duplication of data blocks in a virtualized storage array is disclosed. In one embodiment, in a method of de-duplication of data, a master list of metadata is created based on a number of occurrences of data blocks within a storage array. A first sublist of metadata is created from the master list of metadata. The first sublist of metadata is provided to a first component of a networked storage system. It is determined whether the data block being written has a corresponding entry in the master list of metadata based on a determination that a data block being written does not have any corresponding entry in the first sublist of metadata. The data block being written is replaced with a pointer based on a determination that the data block being written has a corresponding entry in the master list of metadata.

System and method for application aware de-duplication of data blocks in a virtualized storage array

A system for managing a storage array having a set of storage components comprises a storage array controller, the storage array controller including: a first instance of a controller firmware on a virtual machine in a privileged domain, the privileged domain having access to hardware of the storage array; and a second instance of the controller firmware on a separate virtual machine in a first non-privileged array domain. The privileged domain is configured to inspect an I/O request and determine whether a target of the I/O request is an existing non-privileged array domain, to initiate launch of the first non-privileged array domain array when the I/O request does not relate to an existing non-privileged array domain, and to present available storage components to the first non-privileged array domain when the I/O request relates to the first non-privileged array domain.

System and apparatus for managing a storage array utilizing a plurality of virtual machines

A method for dynamic storage tiering may include, but is not limited to: receiving an input/output (I/O) request from a host device; determining whether the I/O request results in a cache hit; and relocating data associated with the I/O request between a higher-performance storage device and lower-performance storage device according to the determination whether the data associated with the I/O request is stored in a cache.

Dynamic storage tiering

A system and method for application aware de-duplication (de-dup) of data blocks in a virtualized storage array is disclosed. In one embodiment, in a method of application aware de-dup of data blocks on virtualized storage arrays in a storage area network, a de-dup agent is enabled on each of one or more components of the storage area network. A master list of metadata associated with indexed data is then created and stored in the virtualized storage arrays. One or more sublists of metadata are then created from the masterlist and are stored. Upon receiving a write request from an application residing in the host device, it is determined whether data block being written has an entry in a sublist stored in a host device, and if so, the data block is then replaced with a pointer indicating where the data block is residing in the virtualized storage arrays.

Growing community of inventors

Bengaluru, India

Gopakumar Ambat