Abstract: Apparatuses, systems, and methods for data expiry include examining metadata associated with data in a non-volatile recording medium. Apparatuses, systems, and methods include expiring data from a non-volatile recording medium in response to metadata indicating that an expiration period for the data has been satisfied.

Abstract: A storage layer stores integrity data corresponding to data groups being written to a storage array. The storage layer validates stored data groups by use of the integrity data, independent of recovery information managed by the storage array. The storage layer preempts crash recovery operations of the storage array by validating a subset of the data groups. The storage layer identifies data groups to validate based on a location of a log append point within a storage address space of the storage array. The storage layer may be further configured to mitigate write hole conditions by, inter alia, reconstructing invalid data of a data group and/or retaining valid portions of the data group.

Abstract: An information handling system is provided. The information handling system includes systems and methods for expanding the port count in a single Fibre Channel domain by adding modular Fibre Channel switches. Such a system includes a system enclosure that contains a plurality of Fibre Channel modules configured to send and receive Fibre Channel packets, the Fibre Channel modules providing a plurality of Fibre Channel ports and a switch processor coupled to the plurality of Fibre Channel ports and to a plurality of Ethernet ports. The switch processor is configured to apply a stacking header to Fibre Channel packets for transmission from one of the plurality of Ethernet ports over a stacking link to another switch processor in another system enclosure.

Abstract: An information handling system is provided. The information handling system includes an information handling device having one or more processors in communication with a network interface card. The network interface card includes one or more interfaces for receiving frames the information handling device is coupled to an external network device. The device also includes a memory that is in communication with the one or more processors and stores a classification matrix. The classification matrix is used to generate a current interrupt throttling rate from a plurality of candidate interrupt throttling rates that are applied to the received frames according to at least two properties of each frame of the received frames. A method for providing adaptive interrupt coalescing is also provided.

Abstract: A storage layer of a non-volatile storage device may be configured to provide key-value storage services. Key conflicts may be resolved by modifying the logical interface of data stored on the non-volatile storage device. Resolving a key conflict may comprise identifying an alternative key and implementing one or more range move operations configured to bind the stored data to the alternative key. The move operations may be implemented without relocating the data on the non-volatile storage device.

Abstract: An information handling system is provided. The information handling system includes systems and methods for expanding the port count in a single Fiber Channel domain by adding modular Fiber Channel switches. Such a system includes a system enclosure that contains a plurality of Fiber Channel modules configured to send and receive Fiber Channel packets, the Fiber Channel modules providing a plurality of Fiber Channel ports and a switch processor coupled to the plurality of Fiber Channel ports and to a plurality of Ethernet ports. The switch processor is configured to apply a stacking header to Fiber Channel packets for transmission from one of the plurality of Ethernet ports over a stacking link to another switch processor in another system enclosure.

Abstract: An information handling system is provided. The information handling system includes an information handling device having one or more processors in communication with a network interface card. The network interface card includes one or more interfaces for receiving frames the information handling device is coupled to an external network device. The device also includes a memory that is in communication with the one or more processors and stores a classification matrix. The classification matrix is used to generate a current interrupt throttling rate from a plurality of candidate interrupt throttling rates that are applied to the received frames according to at least two properties of each frame of the received frames. A method for providing adaptive interrupt coalescing is also provided.

Abstract: Techniques are disclosed relating to handling snapshot data for a storage device. In one embodiment, a computing system maintains information that indicates the state of data associated with an application at a particular point in time. In this embodiment, the computing system assigns an epoch number to a current epoch, where the current epoch is an interval between the particular point in time and a future point in time. In this embodiment, the computing system writes, during the current epoch, a block of data to the storage device. In this embodiment, the writing the block of data includes storing the epoch number with the block of data.

Abstract: A storage system implements a sparse, thinly provisioned logical-to-physical translation layer. The storage system may perform operations to modify logical-to-physical mappings, including creating, removing, and/or modifying any-to-any and/or many-to-one mappings between logical identifiers and stored data (logical manipulation operations). The storage system records persistent metadata to render the logical manipulation (LM) operations persistent and crash-safe. The storage system may provide access to LM functionality through a generalized LM interface. Clients may leverage the LM interface to efficiently implement higher-level functionality and/or offload LM operations to the storage system.

Abstract: A cache module leverages a logical address space and storage metadata of a storage module (e.g., virtual storage module) to cache data of a backing store. The cache module maintains access metadata to track access characteristics of logical identifiers in the logical address space, including accesses pertaining to data that is not currently in the cache. The access metadata may be separate from the storage metadata maintained by the storage module. The cache module may calculate a performance metric of the cache based on profiling metadata, which may include portions of the access metadata. The cache module may determine predictive performance metrics of different cache configurations. An optimal cache configuration may be identified based on the predictive performance metrics.

Abstract: Apparatuses, systems, methods, and computer program products are disclosed. A method includes processing metadata for data saved from a volatile memory buffer to a non-volatile storage medium. The data may be saved in response to a trigger event for a volatile memory buffer. A method includes locating saved data on a non-volatile storage medium. A method includes providing access to saved data after a trigger event based on processed metadata.

Abstract: Techniques are disclosed relating to determining statistics associated with the storage of data on a medium. In one embodiment, a computing system maintains a management statistic for a storage device, and uses the management statistic as a proxy for a workload statistic for a storage block within the storage device. In some embodiments, the storage block is a first storage block included within a second storage block of the storage device. In one embodiment, the management statistic is a timestamp indicative of when a write operation was performed for the second storage block; the workload statistic is a write frequency of the first storage block. In one embodiment, the management statistic is a number of read operations performed for the second storage block; the using includes deriving, based on the number of read operation, a read frequency for the first storage block as the workload statistic.

Abstract: Techniques are disclosed relating to reclaiming data on recording media. In one embodiment, an apparatus has a solid-state memory array including a plurality of blocks. The solid-state memory array may implement a cache for one or more storage devices. Respective operational effects are determined relating to reclaiming ones of the plurality of blocks. One of the plurality of blocks is selected as a candidate for reclamation based on the determined operational effects, and the selected block is reclaimed. In some embodiments, the determined operational effects for a given block indicate a number of write operations to be performed to reclaim the given block. In some embodiments, operational effects are determined based on criteria relating to assigned quality-of-service levels. In some embodiments, operational effects are determined based on information relating to virtual storage units.

Abstract: Apparatuses, systems, and methods are disclosed for a key-value store. A method includes encoding a key of a key-value pair into a logical address of a sparse logical address space for a non-volatile medium. A method includes mapping a logical address to a physical location in the non-volatile medium. A method includes storing a value of a key-value pair at a physical location.

Abstract: Apparatuses, systems, methods and computer program products are disclosed for auto-commit memory management. A method includes receiving a memory request from a client, such as a barrier request or a checkpoint request. The memory request is associated with a volatile memory buffer of a non-volatile recording device. The memory buffer may be configured to preserve data in the non-volatile recording device in response to a trigger. A method includes issuing a serializing instruction that flushes data from a processor complex to the memory buffer. A method includes determining completion of the serializing instruction flushing the data to the memory buffer.

Abstract: A storage module may be configured to perform log storage operations on a storage log maintained on a non-volatile storage medium. An I/O client may utilize storage services of the storage module to maintain an upper-level log. The storage module may be configured to coordinate log storage and/or management operations between the storage log and the upper-level log. The coordination may include adapting a segment size of the logs to reduce write amplification. The coordination may further include coordinating validity information between log layers, adapting log grooming operations to reduce storage recovery overhead, defragmenting upper-level log data within the storage address space, preventing fragmentation of upper-level log data, and so on. The storage module may coordinate log operations by use of log coordination messages communicated between log layers.

Abstract: An aggregation module combines a plurality of logical address spaces to form a conglomerated address space. The logical address spaces comprising the conglomerated address space may correspond to different respective storage modules and/or storage devices. An atomic aggregation module coordinates atomic storage operations within the conglomerated address space, and which span multiple storage modules. The aggregation module may identify the storage modules used to implement the atomic storage request, assign a sequence indicator to the atomic storage request, and issue atomic storage requests (sub-requests) to the storage modules. The storage modules may be configured to store a completion tag comprising the sequence indicator upon completing the sub-requests issued thereto. The aggregation module may identify incomplete atomic storage requests based on the completion information stored on the storage modules.

Abstract: An information handling system is provided. The information handling system includes one or more devices coupled together to route information between the one or more devices and other devices coupled thereto based on routing information stored in the one or more devices. The one or more devices includes a routing processor, one or more line cards coupled to the routing processor, the one or more line cards receiving the routing information from the routing processor for routing data packets to a destination, and a memory coupled to the routing processor. The routing processor is configured to create an active image having a current state of the routing information and create a standby image having the current state of the routing information, wherein the standby image requests the current state of the routing information from the active image using a key that is calculated using a portion of the routing information.

Abstract: An information handling system is provided. The information handling system includes one or more devices coupled together to route information between the one or more devices and other devices coupled thereto based on routing information stored in the one or more devices. The one or more devices includes a routing processor, one or more line cards coupled to the routing processor, the one or more line cards receiving the routing information from the routing processor for routing data packets to a destination, and a memory coupled to the routing processor. The routing processor is configured to create an active image having a current state of the routing information and create a standby image having the current state of the routing information, wherein the standby image requests the current state of the routing information from the active image using a key that is calculated using a portion of the routing information.

Abstract: An atomic storage module may be configured to implement atomic storage operation directed to a first set of identifiers in reference to a second, different set of identifiers. In response to completing the atomic storage operation, the atomic storage module may move the corresponding data to the first, target set of identifiers. The move operation may comprise modifying a logical interface of the data. The move operation may further include storing persistent metadata configured to bind the data to the first set of identifiers.