Abstract: A method performed by a data storage apparatus of maintaining filesystem object attributes in connection with a plurality of drivers is provided. Each driver of the plurality is configured to operate on a respective set of filesystem objects. The method includes (a) for each driver of the plurality, creating a respective driver-specific storage volume; (b) storing, within each driver-specific storage volume, attributes specific to respective filesystem objects operated on by the driver of that driver-specific storage volume; and (c) while operating a particular driver of the plurality on a particular filesystem object, using values of the stored attributes specific to that particular filesystem object operated on by that particular driver. An apparatus, system, and computer program product for performing a similar method are also provided.

Abstract: Techniques for providing a unified approach to an orchestration of services for accomplishing data import tasks, data replication tasks, and/or data migration tasks in a clustered storage environment. The techniques are employed in a clustered storage environment that includes one or more storage domains, each of which includes, as members of the storage domain, a primary storage appliance and one or more secondary storage appliances. By providing, in a primary storage appliance of a storage domain within a clustered storage environment, an orchestrator for orchestrating a set of orchestration phases, which can be shared to perform data import tasks, data replication tasks, and/or data migration tasks involving a foreign storage system deployed outside of the clustered storage environment and/or one or more data storage appliance deployed within the clustered storage environment, enhanced efficiencies due to infrastructure sharing within the clustered storage environment can be achieved.

Abstract: Techniques for providing a unified approach to an orchestration of services for accomplishing data import tasks, data replication tasks, and/or data migration tasks in a clustered storage environment. The techniques are employed in a clustered storage environment that includes one or more storage domains, each of which includes, as members of the storage domain, a primary storage appliance and one or more secondary storage appliances. By providing, in a primary storage appliance of a storage domain within a clustered storage environment, an orchestrator for orchestrating a set of orchestration phases, which can be shared to perform data import tasks, data replication tasks, and/or data migration tasks involving a foreign storage system deployed outside of the clustered storage environment and/or one or more data storage appliance deployed within the clustered storage environment, enhanced efficiencies due to infrastructure sharing within the clustered storage environment can be achieved.

Abstract: A technique for providing access to a data object serving as a target of snapshot-shipping replication includes taking a system snap of the data object after completion of each of multiple snapshot-shipping updates. In response to receiving a request to take a user snap of the data object, a data storage system redirects the request to a previously generated system snap, so that the data storage system takes the user snap of the system snap rather than taking the user snap of the data object itself.

Abstract: A technique for providing access to a data object serving as a target of snapshot-shipping replication includes taking a system snap of the data object after completion of each of multiple snapshot-shipping updates. In response to a data storage system receiving an IO (input/output) request to read and/or write to the data object, a data storage system redirects the IO request to a previously generated system snap, so that the data storage system performs the operation specified in the IO request on the system snap rather than of the data object itself.

Abstract: The subject disclosure is generally directed towards load balancing between storage processors based upon dynamic redirection statistics, in which load balancing includes changing a preferred path/a mounted file system from one storage processor to another. In one example, load balancing technology compares a current delta of directed and redirected I/O counts to a previous delta. If the result turns from negative to positive, that is, redirection is becoming prevalent, a load balancing threshold may be changed based upon the current delta value. Load balancing is thus based on the latest trend of I/O redirection.

Abstract: A method is used for managing consistency groups in storage systems. A consistency group comprising multiple logical objects is created and multiple replicas of the consistency group are created. The consistency group is restored to one of the multiple replicas.

Abstract: A method is used in managing restore operations in storage systems. A state of a logical object is retrieved and a second logical object is placed in a pre-step mode. An instantaneous restore operation between the first logical object and the second logical object is performed. Drivers that are associated with the instantaneous restore and utilize data-less writes are identified. A granularity value representative of a size at which the identified driver tracks changes is determined. Changed data extents in the first logical object are identified. Data-less writes are sent at the lowest determined granularity to any identified extents in the first logical object.

Abstract: A method is used in managing restore operations in storage systems. A state of a logical object is retrieved and a second logical object is placed in a pre-step mode. An instantaneous restore operation between the first logical object and the second logical object is performed. Changed data extents in the first logical object are identified. Data-less writes are sent to any identified extents in the first logical object.

Abstract: A method is used for managing snapshot mount points in storage systems. A request to resize a snapshot mount point is received and a file object associated with the snapshot mount point is retrieved. The file object is analyzed to determine a file attached to the snapshot mount point and a file ID is determined for an underlying file associated with the determined file. The file associated with the file ID is resized.

Abstract: A method is used in managing properties collection. Storage objects for which properties information is to be refreshed are determined. A bulk request for properties information from file systems corresponding to the storage objects is generated and is issued to the file systems. Based on a response to the bulk request, a blocking transaction is used to update a model of the storage objects that is made available to management software.

Abstract: A method is used in managing consistency groups in storage systems. A consistency group is created from a set of snapshot mount points. A snapshot mount point is a logical object accessible for using a replica of a logical volume. An operation is performed on the consistency group.