Abstract: Provided are a method, system, and article of manufacture, wherein a data structure corresponding to a set of client nodes selected from a plurality of client nodes is generated. Objects from the selected set of client nodes are stored in the data structure. A determination is made that an object corresponding to a client node of the selected set of client nodes has to be stored. An additional determination is made as to whether the object has already been stored in the data structure by any client node of the selected set of client nodes. The object is stored in the data structure, in response to determining that the object has not already been stored in the data structure by any client node of the selected set of client nodes.

Abstract: Provided are a method, system, and program for maintaining active-only storage pools. A first storage pool includes at least a first aggregate including a plurality of active and inactive files. A second aggregate is generated in a second storage pool. A determination is made of active versions of files in the first aggregate that satisfy at least one criterion. The determined active versions of files are copied from the first aggregate to the second aggregate in the second storage pool, wherein the second aggregate does not include inactive versions of files in the first storage pool.

Abstract: Provided are a method, system, and program for maintaining an aggregate including active files in a storage pool. One active-only storage pool is included in a plurality of storage pools. Each storage pool includes files and the active-only storage pool is intended to include only active files and not inactive versions of files. The active-only storage pool includes at least a first aggregate including a plurality of files. One file is deactivated in the first aggregate in the active only storage pool to produce an inactive version of the file, wherein the first aggregate includes the inactive version of the file. A determination is made of inactive versions of files in the first aggregate. A second aggregate is generated in the active only storage pool including the active files from the first aggregate and not including the determined inactive versions of files from the first aggregate. The second aggregate replaces the first aggregate in the active-only storage pool.

Abstract: Provided are a method, system, and article of manufacture wherein one client node is selected from a plurality of client nodes. A determination is made that an object corresponding to a client node has to be stored. A determination is made as to whether the object has already been stored in the server node by the one selected client node. The object is stored at the server node, in response to determining that the object has not already been stored in the server node by the one selected client node.

Abstract: Provided are a method, system, and program for maintaining an aggregate including active files in a storage pool in a random access medium. An active-only storage pool is configured in a random access device. The active-only storage pool is intended to include only active files and not inactive versions of files. A plurality of files in the active-only storage pool are associated with a precursor aggregate in the active-only storage pool. One file associated with the precursor aggregate in the active only storage pool is deactivated to produce an inactive version of the deactivated file. The precursor aggregate is associated with the inactive version of the file in response to the deactivation. A determination is made of the inactive version of at least one file in the precursor aggregate. The determined inactive version of the at least one file is deleted from the active only storage pool.

Abstract: Provided are a method, system, and article of manufacture, wherein a determination is made that an object corresponding to a first client node has to be stored. A further determination is made as to whether the object has already been sent to a server node by a second client node, wherein the sent object is stored in the server node and is represented by a first entry, and wherein objects and representations of objects stored in the server node form a plurality of groups. The server node receives the object from the first client node, in response to determining that the object has not already been stored in the server node by the second client node. A second entry representing the object is stored at the server node, wherein the second entry references the first entry, in response to determining that the object has already been stored in the server node by the second client node.

Abstract: Provided are a method, system, and program for managing retention of stored objects. A modification request is received with respect to a stored object. A determination is made as to whether a retention protection mechanism is set and a storage policy associated with the stored object is processed to determine whether the stored object has expired according to the storage policy in response to determining that the retention protection mechanism is set. The modification request is allowed to proceed in response to determining that the stored object has expired.

Abstract: Provided are a method, system, and program for transferring data among a logical layer, physical layer, and storage device. The logical layer allocates a buffer to use to write data to a storage device. The physical layer manages access to the storage device. The logical layer determines an offset into the buffer based on a length of a physical header written by the physical layer and writes data to the buffer from the determined offset. The physical layer writes physical header information, wherein the physical header information does not extend past the offset in the buffer. The physical layer transfers content from the buffer to the storage device.

Abstract: Techniques are provided for allocating storage space to a storage pool. A request for storage space for the storage pool is received. A list of locations associated with the storage pool is obtained, wherein the locations are capable of spanning multiple file systems or multiple directories within a single file system. One or more allocation techniques are applied to select one or more locations at which storage space is to be allocated. The storage space is allocated at the selected one or more locations.

Abstract: An agent installed on a server reclaims one or more reclaimable off-site copy storage volumes and one or more reclaimable on-site copy storage volumes. To this end, the agent identifies each reclaimable off-site copy storage volume, runs a plurality of threads to collectively copy each data object of the identified reclaimable off-site copy storage volume(s) that is stored within one or more primary storage volumes to one or more one on-site target copy storage volumes, identifies each reclaimable on-site copy storage volume, and runs the plurality of threads to collectively transfer each data object of the identified reclaimable on-site copy storage volume(s) to the on-site copy target copy storage volume(s).

Abstract: LAN-managed storage volumes are managed by a LAN storage manager installed on a storage management server. In processing a LAN-free storage volume request, the LAN tape manager selects a LAN-managed storage volume responsive to the LAN-free storage volume allocation request wherein the LAN-managed storage volume is initialized as a candidate for a LAN-free storage operation. The LAN-managed storage volume may be initialized by the LAN storage manager as a candidate for a LAN-free storage operation prior to the LAN storage manager receiving the LAN-free storage volume allocation request or in response to the LAN storage manager receiving the LAN-free storage volume allocation request. Additionally, prior to being initialized as a candidate for a LAN-free storage operation, the LAN-managed storage volume may be a pre-existing storage volume or a scratch storage volume.

Abstract: A policy-based retention manager provides protection and management of files in a WORM file volume. The protection of the files is accomplished by the manager establishing a volume retention period for securely storing the files within the WORM file volume on a WORM media (e.g., a WORM disk media) based on a file retention end date of each file within the WORM file volume, and securely storing the WORM file volume on the WORM media during the volume retention period. The management of the files is accomplished by the manager establishing a volume reclamation period for reclaiming unexpired files within the WORM file volume prior to an expiration of the volume retention period, and reclaiming each unexpired file within the WORM file volume from the WORM media during the volume reclamation period.

Abstract: An apparatus for adaptive polling of a monitored system includes a poll receiving module configured to receive a polling signal from a polling system, an event prediction module configured to predict when an operation-related event of a monitored operation will occur in the monitored system, a next polling time determination module configured to determine a next polling time based on the prediction of when the operation-related event will occur in the monitored system and a polling response module configured to communicate the next polling time and monitored system operation information to the polling system. In one embodiment, the next polling time determination module is further configured to determine the next polling time based on the prediction of when the operation-related event will occur and on network traffic.

Abstract: Provided is a method, system and program for storing data for later retrieval and for transfer within a storage hierarchy. A data storage subsystem stores both individual user files and also managed files, each managed file comprising an aggregation of multiple user files. After receiving user files from a client station, the subsystem stores user files in a retrieval storage pool to facilitate file retrieval. Criteria are subsequently applied to the user files stored in the retrieval storage pool to delete low or lower priority files from the retrieval storage pool. In addition, user files are aggregated in managed files for transfer to another location within the storage hierarchy.

Abstract: A copy procedure detects qualified data objects in a body of source data, and copies the source data to a target storage unit except for unqualified data objects, which are replaced with a prescribed bit pattern. Following completion of the backup, a record is prepared indicating that all data objects exist in the specified target storage, regardless of whether each data object was replaced with a predetermined bit pattern rather than being physically written to the specified target storage. This process may, be repeated in order to perform data reclamation, effectively removing user files no longer qualifying for backup.

Abstract: One aspect of the invention is a method for providing real-time feedback regarding the effect of applying a policy definition used for management in a computing system. An example of the method includes receiving the policy definition, and accessing stored information regarding at least one managed entity in the computing system. This example also includes applying the policy definition to the information regarding the at least one managed entity. This example further includes outputting information providing real-time feedback regarding the effect of applying the policy definition to the information regarding the at least one managed entity. Another aspect of the invention is a method for defining a policy used for management in a computing system.

Abstract: An apparatus, system, and method are disclosed for provisioning storage resources according to a modeling policy. The modeling apparatus includes a monitoring module, a policy module, and a provisioning module. The monitoring module monitors the storage resources on the storage system. The policy module stores and maintains storage management, storage provisioning, and storage resource modeling policies. A user may access and specify these policies via a specification module. The provisioning module automatically provisions new storage resources, such as logical unit numbers (LUNs) according to the storage provisioning policies and modeling policies. The modeling policy defines a modeling strategy by which new storage resources are provisioned to include some or all of the attributes of a model storage resource.

Abstract: Provided are a method, system, and program for managing retention of stored objects. A modification request is received with respect to a stored object. A determination is made as to whether a retention protection mechanism is set and a storage policy associated with the stored object is processed to determine whether the stored object has expired according to the storage policy in response to determining that the retention protection mechanism is set. The modification request is allowed to proceed in response to determining that the stored object has expired.

Abstract: A novel human sodium phosphate cotransporter expressed on the apical surface of intestinal epithelial cells (huNpt2B) and polypeptides related thereto, as well as nucleic acid compositions encoding the same, are provided. The subject polypeptides and nucleic acid compositions find use in a variety of applications, including research, diagnostic, and therapeutic agent screening applications. Also provided are methods of inhibiting Npt2B activity in a host and methods of treating disease conditions associated with Npt2B activity.

Abstract: A novel human sodium phosphate cotransporter expressed on the apical surface of intestinal epithelial cells (huNpt2B) and polypeptides related thereto, as well as nucleic acid compositions encoding the same, are provided. The subject polypeptides and nucleic acid compositions find use in a variety of applications, including research, diagnostic, and therapeutic agent screening applications. Also provided are methods of inhibiting Npt2B activity in a host and methods of treating disease conditions associated with Npt2B activity.