International Business Machines Corporation

Infinidat Ltd.

Kariel E Sandler

Haim Helman

Shemer Schwarz

Jacob Broido

Omri Palmon

Moshe Yanai

Shemer Schwartz

Leo Corry

Ido Ben-Tsion

Dan Aloni

Cyril Plisko

Alexander Goldberg

Guy Rozendorn

Jacob Brodio

Leon Kull

Maxim Kozover

A method for providing fast access, the method may include obtaining, by a first storage controller of a storage system, retrieval information for retrieving, from a permanent storage space, a subset of cached data units, the subset of the cached data units forms a part of a set of cached data units that are cached in a first cache memory and were destaged to the permanent storage space; and retrieving, using the retrieval information, at least some of the cached data units of the subset from the permanent storage space to a second cache memory, wherein the retrieving occurs in response to an occurrence of a failure to access the first cache memory; wherein the second cache memory differs from the first cache memory.

Data protection

There is provided a storage system and a method of moving a source data portion from a source logical volume to a destination logical volume. The method comprises: configuring a source mapping data structure to comprise an entry indicative of mapping between logical addresses corresponding to source data portion and addresses corresponding to source data portion and related to a physical address space; and, responsive to a move command, providing an atomic operation comprising configuring a destination mapping data structure to comprise an entry associated with said at least one destination range and comprising a reference to said entry in the source mapping data structure; and configuring said at least one entry in the source mapping data structure DSto bear an indication that said one or more contiguous ranges of addresses corresponding to said source data portion in the source logical volume Vare unavailable to a client.

Method of migrating stored data and system thereof

A storage system that includes a management communication interface coupled to a storage management layer and further includes a data communication interface. Upon receiving a request for accessing the storage management layer, from the host, via the data communication interface, the management layer sends to the host, access information necessary for allowing access of the host to the storage management layer via the management communication interface; and upon receiving a management command, from the host via the management communication interface, the host is provided with access to the storage management layer, in cases where the management command conforms to the access information.

System and methods for host enabled management in a storage system

A method for compressing information by a computerized system, the method may include receiving a mixture of DNA data and additional information; and compressing the DNA data to provide compressed DNA data, wherein the compressing comprises encoding the DNA data by using a predefined codeword dictionary that was constructed based upon reference DNA data.

System, method and non-transitory computer readable medium for compressing genetic information

There is provided a storage system and a method of migrating a source data portion from a source logical volume to a destination range in a destination logical volume. The method comprises: configuring a source mapping data structure to comprise an entry associated with said source data portion and indicative of mapping between logical addresses corresponding to said source data portion and addresses corresponding to said source data portion and related to a physical address space; and, responsive to a migration command, configuring a destination mapping data structure to comprise an entry associated with said at least one destination range and comprising a reference to said entry in the source mapping data structure, said entry in the source mapping data structure to be used for mapping to said addresses related to said physical address space and corresponding to the source data portion and to the migrated data portion.

A method for data storage includes representing logical volumes by respective sets of pointers to physical partitions in which data used by the logical volumes is stored. One or more of the logical volumes are defined as provisionally deleted. A subset of the provisionally-deleted logical volumes is selected such that each logical volume in the subset has one or more private physical partitions whose data is used exclusively by that logical volume. One or more of the private physical partitions of the logical volumes in the subset are released for reallocation to another logical volume.

Management of recycling bin for thinly-provisioned logical volumes

Embodiments of the present invention provide methods, apparatuses, systems, and computer software products for data storage. A corrupted node under a first meta-volume node in a hierarchical tree structure is deleted. The hierarchical tree structure further includes a source node under the first meta-volume node. The corrupted node and the source node each include a respective set of local pointers. The corrupted node and the source node represent respective copies of a logical volume. The source node is reconfigured to become a second meta-volume node having the same set of local pointers as the source node. A first new node is created under the second meta-volume node in the hierarchical tree structure to represent the corrupted node. A second new node is created under the second meta-volume node to represent the source node. The first and second new nodes are configured to have no local pointers.

Data storage with snapshot-to-snapshot recovery

A method for data storage, including configuring a first logical volume on a first storage system and a second logical volume on a second storage system. The second logical volume is configured as a mirror of the first logical volume, so that the first and second logical volumes form a single logical mirrored volume. The method also includes receiving at the second storage system a command submitted by a host to write data to the logical mirrored volume, and transferring the command from the second storage system to the first storage system without writing the data to the second logical volume. On receipt of the command at the first storage system, the data is written to the first logical volume. Subsequent to writing the data to the first logical volume, the data is mirrored on the second logical volume.

Active-active remote configuration of a storage system

A plurality of upgraded components associated with an upgraded storage subsystem replaces a plurality of existing components associated with an existing storage subsystem. Support for a verify I/O command is created. A target volume is created in the upgraded storage subsystem having a same volume identification as a source volume. For a command received on the at least one of the plurality of upgraded components, the verify I/O command is invoked on at least one of a comparable one of the plurality of existing components. If the command is verified, the command is driven. The at least one of the plurality of upgraded components disguises a true volume identification of the target volume from the at least one of the plurality of existing components.

Concurrent upgrade of all components in storage subsystems

Embodiments of the present invention provide methods, apparatuses, systems, and computer software products for data storage. A first copy of a logical volume is created. A second copy of the logical volume is created based on the first copy of the logical volume, such that the first and second copies are represented by respective first and second sets of pointers to physical storage locations in which data used by the copies is stored. Responsively to a corruption of at least part of the data that is used by the first copy. The first copy is restored from the second copy by replacing the first set with the pointers in the second set.

Exemplary methods, systems, and computer program product embodiments for migrating existing data from a source storage controller to a target storage controller, each associated with a data processing storage subsystem, using a processor device in communication with a memory device, are provided. The target storage controller is configured with at least one target volume having pass-through support to a source volume of the source storage controller. An input/output (I/O) path to the existing data through the target storage controller is configured. The I/O path is added to an existing I/O path connected to the existing data using an operating system (OS) operational on at least one host in communication between the source and target storage controllers. The OS is adapted for I/O multipath support. Upon completion of data migration, the existing I/O path is removed.

Growing community of inventors

Tel Aviv, Israel

Kariel E Sandler