Abstract: A multi-level cache comprises a plurality of cache levels, each configured to cache I/O request data pertaining to I/O requests of a different respective type and/or granularity. The multi-level cache may comprise a file-level cache that is configured to cache I/O request data at a file-level of granularity. A file-level cache policy may comprise file selection criteria to distinguish cacheable files from non-cacheable files. The file-level cache may monitor I/O requests within a storage stage, and may service I/O requests from a cache device.

Abstract: A multi-level cache comprises a plurality of cache levels, each configured to cache I/O request data pertaining to I/O requests of a different respective type and/or granularity. A cache device manager may allocate cache storage space to each of the cache levels. Each cache level maintains respective cache metadata that associates I/O request data with respective cache address. The cache levels monitor I/O requests within a storage stack, apply selection criteria to identify cacheable I/O requests, and service cacheable I/O requests using the cache storage device.

Abstract: Apparatuses, systems, and methods are disclosed to manage non-volatile media. A method includes determining a configuration parameter for a set of storage cells of a non-volatile recording medium. A method includes reading data from a set of storage cells using a determined configuration parameter. A method includes adjusting a configuration parameter based on read data.

Abstract: An apparatus, system, and method are disclosed for allocating non-volatile storage. The storage device may present a logical address, which may exceed a physical storage capacity of the device. The storage device may allocate logical capacity in the logical address space. An allocation request may be allowed when there is sufficient unassigned and/or unallocated logical capacity to satisfy the request. Data may be stored on the non-volatile storage device by requesting physical storage capacity. A physical storage request, such as a storage request or physical storage reservation, when there is sufficient available physical storage capacity to satisfy the request. The device may maintain an index to associate logical identifiers (LIDs) in the logical address space with storage locations on the storage device. This index may be used to make logical capacity allocations and/or to manage physical storage space.

Abstract: An apparatus, system, and method are disclosed for managing eviction of data. A grooming cost module determines a grooming cost for a selected region of a nonvolatile solid-state cache. The grooming cost includes a cost of evicting the selected region of the nonvolatile solid-state cache relative to other regions. A grooming candidate set module adds the selected region to a grooming candidate set in response to the grooming cost satisfying a grooming cost threshold. A low cost module selects a low cost region within the grooming candidate set. A groomer module recovers storage capacity of the low cost region.

Abstract: An apparatus, system, and method are disclosed for data block usage information synchronization for a non-volatile storage volume. The method includes referencing first data block usage information for data blocks of a non-volatile storage volume managed by a storage manager. The first data block usage information is maintained by the storage manager. The method also includes synchronizing second data block usage information managed by a storage controller with the first data block usage information maintained by the storage manager. The storage manager maintains the first data block usage information separate from second data block usage information managed by the storage controller.

Abstract: Apparatuses, systems, and methods are disclosed to manage non-volatile media. A method includes determining a configuration parameter for a set of storage cells of a non-volatile recording medium. A method includes reading data from a set of storage cells using a determined configuration parameter. A method includes adjusting a configuration parameter based on read data.

Abstract: Apparatuses, systems, methods, and computer program products are disclosed for configuring storage cells. A method includes detecting a shift in a read voltage level past a read voltage threshold for a set of memory cells of a non-volatile memory medium. A method includes adjusting a read voltage threshold for the set of memory cells by an amount based at least in part on one or more characteristics of the set of memory cells in response to the shift in the read voltage level. A method includes configuring the set of memory cells to use the adjusted read voltage threshold.