Dell Products Inc.

Emc IP Holding Company LLC

Prakash Venkat

Gopakumar Ambat

G Paul Koning

Amihay Azruel

Daniel R Oelke

Mrutyunjaya Prasad Jali

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

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Bengaluru, India

Prakash Venkat