Abstract: One example method includes connecting to a fileserver of a data protection system, initiating, at a client, an operation that is associated with a master pseudofs of the fileserver, creating, at the client, a client-specific pseudofs based upon the master pseudofs, and the client-specific pseudofs includes only those nodes of the master pseudofs that the client is authorized to access, and performing the operation using the client-specific pseudofs.

Abstract: One example method includes transmitting, from a client, a remote procedure call (RPC) to a fileserver of a data protection system, the RPC including information identifying an export, then receiving, at the client, node information concerning the export, and the node information concerns a master pseudofs of the fileserver. Finally, the example method includes creating, at the client, a sparse client-specific pseudofs that is based on the node information received from the fileserver, and the sparse client-specific pseudofs includes fewer than all the master pseudofs nodes that the client is authorized to access.

Abstract: One example method includes connecting to a fileserver of a data protection system, initiating, at a client, an operation that is associated with a master pseudofs of the fileserver, creating, at the client, a client-specific pseudofs based upon the master pseudofs, and the client-specific pseudofs includes only those nodes of the master pseudofs that the client is authorized to access, and performing the operation using the client-specific pseudofs.

Abstract: One example method includes connecting to a fileserver of a data protection system, initiating, at a client, an operation that is associated with a master pseudofs of the fileserver, creating, at the client, a client-specific pseudofs based upon the master pseudofs, and the client-specific pseudofs includes only those nodes of the master pseudofs that the client is authorized to access, and performing the operation using the client-specific pseudofs.

Abstract: Disclosed is a method, apparatus, and system for a method for implementing a mutual-exclusion semantic for target update, the method comprising: receiving a tagset update request for a tagset associated with an object, the tagset update request comprising one or more metadata tags to be updated; determining whether updating the tagset based on the received tagset update request would cause a value of any existing metadata tag in the tagset to change; and in response to determining that updating the tagset based on the received tagset update request would cause a value of at least one existing metadata tag in the tagset to change, rejecting the tagset update request.

Abstract: Disclosed is a method, apparatus, and system for a method for enforcing namespace-specific semantics based on object operations, the method comprising: detecting an operation performed on an object of a data storage system in a namespace associated with the object; determining whether additional operations on a tagset associated with the object are mandated by one or more semantics that are specific to the namespace based on the operation, a persona of the object in the namespace, and the one or more semantics; and in response to determining that additional operations are mandated by the one or more semantics, performing the additional operations mandated by the one or more semantics on the tagset.

Abstract: Disclosed is a method, apparatus, and system for a method for enforcing namespace-specific semantics based on object operations, the method comprising: detecting an operation performed on an object of a data storage system in a namespace associated with the object; determining whether additional operations on a tagset associated with the object are mandated by one or more semantics that are specific to the namespace based on the operation, a persona of the object in the namespace, and the one or more semantics; and in response to determining that additional operations are mandated by the one or more semantics, performing the additional operations mandated by the one or more semantics on the tagset.

Abstract: Disclosed is a method, apparatus, and system for a method for implementing a mutual-exclusion semantic for target update, the method comprising: receiving a tagset update request for a tagset associated with an object, the tagset update request comprising one or more metadata tags to be updated; determining whether updating the tagset based on the received tagset update request would cause a value of any existing metadata tag in the tagset to change; and in response to determining that updating the tagset based on the received tagset update request would cause a value of at least one existing metadata tag in the tagset to change, rejecting the tagset update request.

Abstract: One example method includes creating a tagset comprising a plurality of metadata tags, associating the tagset with an object that resides in two or more namespaces, creating a first persona and a second persona, wherein from a perspective of the first persona, the object is a first type of object, and from a perspective of the second persona, the object is a second type of object, enabling improved user access to the object by associating the first persona and the second persona with the tagset so that the object is accessible using both a first access method associated with the first persona and using a second access method associated with the second persona, and accessing the object using one or both of the first persona and the second persona.

Abstract: One example method includes connecting to a fileserver of a data protection system, initiating, at a client, an operation that is associated with a master pseudofs of the fileserver, creating, at the client, a client-specific pseudofs based upon the master pseudofs, and the client-specific pseudofs includes only those nodes of the master pseudofs that the client is authorized to access, and performing the operation using the client-specific pseudofs.

Abstract: One example method includes transmitting, from a client, a remote procedure call (RPC) to a fileserver of a data protection system, the RPC including information identifying an export, then receiving, at the client, node information concerning the export, and the node information concerns a master pseudofs of the fileserver. Finally, the example method includes creating, at the client, a sparse client-specific pseudofs that is based on the node information received from the fileserver, and the sparse client-specific pseudofs includes fewer than all the master pseudofs nodes that the client is authorized to access.

Abstract: A method and system manages a virtual tape library history database. The method includes triggering an update of the virtual tape library history database in response to detecting a change related to a tape in a virtual tape library state table, where the update is asynchronous from processing of small computer system interface (SCSI) or command line interface (CLI) commands handled by a virtual tape library, and adding a record to a virtual tape history table in the virtual tape library history database, the virtual tape history table corresponding to the tape, where the record includes information about the change, where the virtual tape history table functions as a log of activity for the tape.

Abstract: A data storage system can automatically improve the layout of data blocks on a mass storage subsystem by collecting optimization information during both read and write activities, then processing the optimization information to limit the impact of optimization activities on the system's response to client requests. Processing read-path optimization information and write-path optimization information through shared rate-limiting logic simplifies system administration and promotes phased implementation, which can reduce the difficulty of developing a self-optimizing storage server.

Abstract: A method of making a foreign law in usable in a network storage controller includes transparently converting the foreign logical unit to the native format of the file system in place, by progressively increasing the binding between the file system of the storage controller and the foreign logical unit, while the foreign logical unit remains online, without requiring copying of the foreign logical unit.

Abstract: According to one embodiment, a virtual tape library (VTL) receives a plurality of small computer system interface (SCSI) data objects, and translates the SCSI data objects into a first set of one or more remote procedure call (RPC) data objects having a first size, wherein the first size of the first RPC data set is based on a current limit maintained by the VTL. The VTL writes the first RPC data set and a first RPC commit request to a file system. The VTL receives a first RPC status corresponding to the first RPC commit from the file system, and determines a first latency time between writing the first RPC commit and receiving the first RPC status. The VTL updates the current limit based on the first latency time in order to optimize a second latency time between a second RPC commit request and a corresponding second RPC status.

Abstract: A system and method for setting the World Wide Node Names (WWNNs) of a plurality of ports in a data storage system. In one embodiment, a method includes the operations of receiving a first request that is to set a plurality of WWNNs of a plurality of ports of the storage system, automatically generating a first WWNN in response to receiving the first request, and assigning the automatically generated first WWNN to a first port of the plurality so that the at least one SCSI device is visible over a Fiber Channel (FC) network as a target for SCSI requests at the first port assigned the first WWNN.

Abstract: Systems and methods are described that manage service daemons using a unified small computer system interface (SCSI) target management daemon. SCSI target management daemon SCSI target management daemon manages each service daemon operating in a SCSI target device with consideration and knowledge of each other service daemon. This unified system eliminates potential conflicts during service daemon setup and shutdown as SCSI target management daemon is aware of these potential conflicts.

Abstract: Systems and methods are described that manage service daemons using a unified small computer system interface (SCSI) target management daemon. SCSI target management daemon SCSI target management daemon manages each service daemon operating in a SCSI target device with consideration and knowledge of each other service daemon. This unified system eliminates potential conflicts during service daemon setup and shutdown as SCSI target management daemon is aware of these potential conflicts.

Abstract: Systems and methods are described that manage service daemons using a unified small computer system interface (SCSI) target management daemon. SCSI target management daemon SCSI target management daemon manages each service daemon operating in a SCSI target device with consideration and knowledge of each other service daemon. This unified system eliminates potential conflicts during service daemon setup and shutdown as SCSI target management daemon is aware of these potential conflicts.

Abstract: Systems and methods are described that manage service daemons using a unified small computer system interface (SCSI) target management daemon. SCSI target management daemon SCSI target management daemon manages each service daemon operating in a SCSI target device with consideration and knowledge of each other service daemon. This unified system eliminates potential conflicts during service daemon setup and shutdown as SCSI target management daemon is aware of these potential conflicts.