Abstract: Methods, apparatus and computer program products implement embodiments of the present invention that include storing one or more data volumes to a small computer system interface storage device, and receiving a request to map a given data volume to a host computer. One or more attributes of the given data volume are identified, and using the identified one or more attributes, a unique logical unit number (LUN) for the given data volume is generated. The given data volume is mapped to the host computer via the unique LUN. In some embodiments, the generated LUN includes one of the one or more attributes. In additional embodiments, the generated LUN includes a result of a hash function using the one or more attributes. In storage virtualization environments, the data volume may include secondary logical units, and mapping the given data volume to the host may include binding the SLU to the host.

Abstract: Methods, apparatus and computer program products implement embodiments of the present invention that include receiving, by a first computer in communication with a storage system, multiple resource packs, each of the resource packs including a plurality of attributes for storage resources on the storage system. Upon the first computer receiving a request from a second computer for a storage service, one or more of the received resource packs are identified that have respective attributes matching the storage service, a given identified resource pack is selected and the given identified resource pack is conveyed to the second computer. In some embodiments, the given identified resource pack can be conveyed by conveying an allocation request to the storage system for a portion of the given identified resource pack, and in response to the request, the storage system can allocate the requested portion of the given identified resource pack to the second computer.

Abstract: A fast snapshot is configured to determine if a snapshot is utilized for asynchronous mirroring. The fast snapshot operation is performed by avoiding reference counts of the one or more data units associated with the snapshot from being updated at a creation time and a deletion time when the snapshot is utilized for asynchronous mirroring.

Abstract: Methods, apparatus and computer program products implement embodiments of the present invention that include storing one or more data volumes to a small computer system interface storage device, and receiving a request to map a given data volume to a host computer. One or more attributes of the given data volume are identified, and using the identified one or more attributes, a unique logical unit number (LUN) for the given data volume is generated. The given data volume is mapped to the host computer via the unique LUN. In some embodiments, the generated LUN includes one of the one or more attributes. In additional embodiments, the generated LUN includes a result of a hash function using the one or more attributes. In storage virtualization environments, the data volume may include secondary logical units, and mapping the given data volume to the host may include binding the SLU to the host.

Abstract: Methods, apparatus and computer program products implement embodiments of the present invention that include configuring, by a source storage system, a logical volume to comprise source regions of the source storage system that have a mapping between a host computer and the source storage system, the source regions storing source data. The source data is copied from the source regions to target data in target regions of a target storage system, the target regions being in a one-to-one correspondence with the source regions, and the volume is reconfigured so that the target regions have the mapping between the host computer and the source storage system. In some embodiments, the mapping between the host computer and the source storage system comprises a first mapping, and upon reconfiguring the volume, a second mapping can be added between the host computer and the target storage system, and the first mapping can be deleted.

Abstract: A first storage system is configured as a proxy for a logical volume stored on a second storage system. Upon receiving a response from a second storage system verifying an availability of a logical volume for an input/output (I/O) request, the I/O request is conveyed to an identified port, a result of the I/O request is received from the identified port, the result is conveyed to a host computer.

Abstract: Methods, apparatus and computer program products implement embodiments of the present invention that include detecting, by a storage system, a change in a mapping of a logical volume to one or more host ports of a host computer communicating with the storage system via a storage area network (SAN). Subsequent to detecting the change, first and second input/output (I/O) requests for the logical volume are received from a given host port, and a first unit attention message is conveyed to the given host port in response to the first I/O request. A second unit attention message is conveyed to the given host port upon determining that the storage system received the second I/O request within a specific time period commencing upon receiving the first I/O request. However, the second I/O request can be performed if the storage system received the second I/O request subsequent to the specific time period.

Abstract: Methods, apparatus and computer program products implement embodiments of the present invention that include identifying, by a first computer, multiple network paths to a second computer, and splitting an input/output (I/O) request for a logical volume stored on the second computer into sub-requests. A probe request defining an association between the I/O request and the sub-requests is conveyed to the second computer, and each of the sub-requests is assigned to a respective one of the multiple network paths. Each of the sub-requests are conveyed to the second computer via the assigned respective one of the multiple network paths, and the sub-requests are received by the second computer via the multiple network paths. The second computer performs the sub-requests in response to the association, and a result of each of the sub-requests is conveyed to the first computer via the assigned respective one of the multiple network paths.

Abstract: A fast snapshot is configured to store a state of a computing environment at a point in time. The fast snapshot operation is performed by avoiding reference counts of one or more data units associated with the snapshot from being updated at a creation and a deletion time.

Abstract: Methods, apparatus and computer program products implement embodiments of the present invention that include conveying first data from local regions of a local volume of a local storage system to a remote storage system having a remote volume with remote regions in a one-to-one correspondence with the local regions. While conveying the first data, a request is received to update a given local region, and the given local region is marked.

Abstract: Various embodiments for data compression by a processor. Levels of data distribution are configured for data processing, including a first level of the data distribution incorporating a GRID network of data storage nodes, and a second level of the data distribution incorporating a GRID network of compressive nodes in communication with the GRID network of data storage nodes. Input/output (I/O) for an associated storage volume is load balanced between the data storage nodes, as data passes through the first level into the second level to be compressed or uncompressed.

Abstract: Methods, computing systems and computer program products implement embodiments of the present invention that include configuring multiple storage system resources to manage a storage entity distributed among the storage system resources. Upon receiving, by a first given storage system resource from a host computer, an I/O request for data in the storage entity, a second given storage system resource responsible for managing the storage entity data referenced in the I/O request is identified, and the I/O request is forwarded to the second given storage system resource. Upon receiving the forwarded I/O request, the second given storage system resource performs a data compression operation while processing the I/O request, and conveys a result of the I/O operation to the first given storage system resource. Upon receiving the result from the second given storage system resource, the first given storage system resource forwards the result to the host computer.

Abstract: Methods, apparatus and computer program products implement embodiments of the present invention that include defining a source data volume including a first multiple of source snapshots, and storing the first multiple of the source snapshots in a first storage pool including a second multiple of storage regions having respective identifiers. Upon receiving a request to copy the source data volume to a target data volume in a second storage pool, a first given source snapshot including a first set of the storage regions is accessed, and a second given source snapshot preceding the first given source snapshot is identified, the second given source snapshot including a second set of the storage regions. A set difference of the second and the first sets of the storage regions is identified, and respective identifiers of the set difference are stored to the target volume.

Abstract: Methods, apparatus and computer program products implement embodiments of the present invention that include identifying, by a first computer in communication with a storage system having one or more storage devices, storage resources on the storage system, and defining multiple resource packs, each of the resource packs comprising respective multiple attributes for the storage resources. In response to an inventory request from a second computer in communication with the first computer, each of the resource packs can be conveyed to the second computer. Additionally, upon receiving, from the second computer, an allocation request to allocate a portion of a given resource pack, the portion of the given resource pack can be allocated in response to the request.

Abstract: Methods, apparatus and computer program products implement embodiments of the present invention that include a storage device configured to store a logical volume mapped between a host computer and a computer having multiple initiator ports, and a processor configured to detect a unit attention condition for the logical volume. Examples of unit attention conditions for the logical volume include management operations on the logical volume and host requests for the logical volume. Upon determining, based on the unique serial number, that the processor has previously conveyed the unit attention code to any of the multiple initiator ports, to reconvey an input/output (I/O) request, receive a response for the I/O request, and convey the result to the host computer.

Abstract: Methods, apparatus and computer program products implement embodiments of the present invention that include ascertaining, by a first storage system, a respective port identifier for each of one or more host ports defined to the first storage system for a logical volume stored on a second storage system. Examples of the port identifiers include WWPN and iSCSI iQN identifiers. A respective unique identifier is assigned to each of the ascertained one or more host ports, and for each of the one or more host ports, the respective port identifier and the assigned respective unique identifier are conveyed to the second storage system. Upon receiving, from one of the one or more host ports, an input/output (I/O) request for the logical volume, I/O request with the respective unique identifier of the one of the one or more host ports is conveyed to the second storage system.

Abstract: Various embodiments for data compression by a processor. Levels of data distribution are configured for data processing, including a first level of the data distribution incorporating a GRID network of data storage nodes, and a second level of the data distribution incorporating a GRID network of compressive nodes in communication with the GRID network of data storage nodes. Input/output (I/O) for an associated storage volume is load balanced between the data storage nodes, as data passes through the first level into the second level to be compressed or uncompressed.

Abstract: A first storage system is configured as a proxy for a logical volume stored on a second storage system in a distributed computing environment. A probe request verifying availability of the logical volume is conveyed to an identified port, and upon receiving a response from a second storage system verifying the availability of the logical volume for an I/O request, the I/O request is conveyed to the identified port, a result of the I/O request is received from the identified port, the result is conveyed to the host computer.

Abstract: Systems, methods, and related technologies for application-centric object storage and configuration are described. In certain aspects, a processing device can receive, from an application, one or more requests with respect to a data object. The processing device can process the one or more requests to determine one or more data utilization characteristics of the application with respect to the data object. The processing device can configure one or more aspects of the data object in view of the one or more data utilization characteristics.

Abstract: Systems, methods, and related technologies for application-centric object storage and managing object requests via multiple indexes are described. In certain aspects, a processing device can receive a first data object, generate, with respect to the first data object, a first index, generate, with respect to the first data object, a second index through which the first data object can be accessed, receive a request with respect to the first data object, process the request to determine which of the first index or the second index to utilize in completing the request, and complete the request via at least one of the first index or the second index.