Emc IP Holding Company LLC

Bharadwaj R Sathavalli

Shampavman Chenjeri Gururajarao

Adnan Sahin

Ajay Potnis

Maneesh Singhal

Michael E Specht

Amit Dharmadhikari

Ramrao Patil

Creating and using a virtual cluster may include: creating a first cluster logical device on a first data storage system including data nodes; creating a second cluster logical device on a second data storage system including data nodes; configuring the first cluster logical device and the second cluster logical device as a same first logical device; establishing bidirectional remote replication between the first and second cluster logical devices; determining pairs of data nodes including a data node from the first data storage system and another data node from the second data storage system; determining a failure of a first data node on the first data storage system, wherein one of the pairs of data nodes includes the first data node and a second data node of the second data storage system; and responsive to determining the failure of the first data node, performing failover processing by the second data node.

Techniques for providing intersite high availability of data nodes in a virtual cluster

Software Defined Network Attached Storage data backup is implemented using storage array synchronous data replication. A TLU is created for each user filesystem managed by a Virtual Data Mover (VDM). A VDM configuration filesystem is also created containing metadata describing a mapping of user file system TLU to physical storage resources on the storage array. Both the user filesystem TLUs and the VDM configuration filesystem are mapped to an asynchronous Remote Data Forwarding (RDF) group of the storage array, which is used by the storage array to replicate both the user filesystem TLUs and VDM configuration filesystem. Filesystem ID and export path information are reserved on the primary storage array and backup storage array when the RDF group is set up, to enable transparent failover from the primary to the backup node of selected VDMs.

Software defined network attached storage backup using storage array synchronous or asynchronous data replication

Self-contained disaster detection for replicated multi-controller systems is described herein. A system as described herein can include a memory that stores computer executable components and a processor that executes computer executable components stored in the memory. The computer executable components can include a data synchronization component that replicates data written at a primary production site, resulting in replicated data from the primary production site; a status monitoring component that reads status identifiers contained in the replicated data at periods of a time interval, wherein the status identifiers are written by respective controllers at the primary production site; and a disaster recovery component that initializes a failover procedure at the primary production site in response to an absence of updates to a first threshold number of the status identifiers within a second threshold number of the periods.

Self-contained disaster detection for replicated multi-controller systems

Disaster recovery is provided for Software Defined Network Attached Storage where the data backup is implemented using asynchronous remote data replication. An asynchronous replication facility is created between a primary storage array and a backup storage array. User filesystems being handled by a virtual data mover (VDM) and a configuration filesystem describing the location of the user filesystems on the primary storage array are replicated on the remote data facility to the backup storage array. During failover, all filesystems associated with the asynchronous remote data facility are failed over from a primary storage system associated with the primary storage array to a backup storage system associated with the backup storage array. Where an individual filesystem or individual VDM is to be failed over to the backup storage system, a separate asynchronous replication remote data facility is created to separately replicate data for the aspect to be individually failed over.

Disaster recovery for software defined network attached storage using storage array asynchronous data replication

Disaster recovery is provided for Software Defined Network Attached Storage where the data backup is implemented synchronous data replication. A synchronous replication remote data facility is created between a primary storage array and a backup storage array. User filesystems being handled by a virtual data mover (VDM) and a configuration filesystem describing the location of the user filesystems on the primary storage array are replicated on the remote data facility to the backup storage array. Individual filesystems, individual VDMs, or groups of VDMs may be selectively failed over from the primary storage array to the backup storage array.

Growing community of inventors

Bengaluru, India

Bharadwaj R Sathavalli