A method comprising: receiving, at a block device interface, an instruction to write data, the instruction comprising a memory location of the data; copying the data to pinned memory; performing, by a vector processor, one or more invertible transforms on the data; and writing the data from the pinned memory to one or more storage devices asynchronously; wherein the pinned memory of the data corresponds to a location in pinned memory, the pinned memory being accessible by the vector processor and one or more other processors.

A method of operating a storage appliance is provided. The method includes (a) in response to the appliance receiving a first command to perform a first storage operation on a first plurality of blocks, storing a command record for each block of the first plurality in a cache, each command record respectively indicating an address of that block; (b) upon flushing the command record for each block of the first plurality from the cache to persistent storage, storing data of that block at its indicated address; (c) in response to the storage appliance receiving a second command to perform a second storage operation on a second plurality of blocks, storing, in the cache, an aggregated command record that indicates the second storage operation and an address range of the second plurality, the second storage operation representing an identical change to all blocks of the second plurality; and (d) upon flushing the aggregated command record from the cache to the persistent storage, performing the storage operation indicated by the aggregated command record over the address range indicated by the aggregated command record.

A block-based storage system may implement page cache write logging. Write requests for a data volume maintained at a storage node may be received at a storage node. A page cache for may be updated in accordance with the request. A log record describing the page cache update may be stored in a page cache write log maintained in a persistent storage device. Once the write request is performed in the page cache and recorded in a log record in the page cache write log, the write request may be acknowledged. Upon recovery from a system failure where data in the page cache is lost, log records in the page cache write log may be replayed to restore to the page cache a state of the page cache prior to the system failure.

A method comprising: receiving, at a vector processor, a request to store data; performing, by the vector processor, one or more transforms on the data; and directly instructing, by the vector processor, one or more storage device to store the data; wherein performing one or more transforms on the data comprises: erasure encoding the data to generate n data fragments configured such that any k of the data fragments are usable to regenerate the data, where k is less than n; and wherein directly instructing one or more storage device to store the data comprises: directly instructing the one or more storage devices to store the plurality of data fragments.

A request that specifies a logical address associated with a host-initiated operation directed at a first portion of a memory device is received. A logical to physical (L2P) table is accessed. The L2P table comprises a mapping between logical addresses and physical addresses in a second portion of the memory device. An entry in the L2P table that corresponds to the logical address is identified and is determined to point to an entry in a read cache table. Based on an entry number of the entry in the read cache table, a chunk address of a chunk from among multiple chunks of a read cache is calculated. A physical address that corresponds to the logical address specified by the request is identified by accessing the chunk of read cache. The host-initiated operation is performed at a physical location within the first portion of the memory device corresponding the physical address.

The present disclosure includes apparatuses and methods related to a memory system including a filter. An example apparatus can include a filter to store a number flags, wherein each of the number of flags corresponds to a cache entry and each of the number of flags identifies a portion of the memory device where data of a corresponding cache entry is stored in the memory device.

A method comprising: receiving a request to write data at a virtual location; writing the data to a physical location on a persistent storage device; and recording a mapping from the virtual location to the physical location; wherein the physical location corresponds to a next free block in a sequence of blocks on the persistent storage device.

Techniques perform storage management. Such techniques involve: in response to receiving, at a first processor of a storage system, a write request from a host for writing user data, caching the user data in a first cache of the first processor, and generating cache metadata in the first cache, the cache metadata including information associated with writing the user data; sending the user data and the cache metadata to a second cache of a second processor, for the second processor to perform, in the second cache, data processing related to cache mirroring by the second processor; and sending, to the host, an indication of completion of the write request, without waiting for the second processor to complete the data processing. Such techniques can improve system performance such as reducing latency, and shortening length of the I/O handling path of write request.

A method of operating a storage appliance is provided. The method includes (a) in response to the appliance receiving a first command to perform a first storage operation on a first plurality of blocks, storing a command record for each block of the first plurality in a cache, each command record respectively indicating an address of that block; (b) upon flushing the command record for each block of the first plurality from the cache to persistent storage, storing data of that block at its indicated address; (c) in response to the storage appliance receiving a second command to perform a second storage operation on a second plurality of blocks, storing, in the cache, an aggregated command record that indicates the second storage operation and an address range of the second plurality, the second storage operation representing an identical change to all blocks of the second plurality; and (d) upon flushing the aggregated command record from the cache to the persistent storage, performing the storage operation indicated by the aggregated command record over the address range indicated by the aggregated command record.

A request that specifies a logical address associated with a host-initiated operation directed at a first portion of a memory device is received. A logical to physical (L2P) table is accessed. The L2P table comprises a mapping between logical addresses and physical addresses in a second portion of the memory device. An entry in the L2P table that corresponds to the logical address is identified and is determined to point to an entry in a read cache table. Based on an entry number of the entry in the read cache table, a chunk address of a chunk from among multiple chunks of a read cache is calculated. A physical address that corresponds to the logical address specified by the request is identified by accessing the chunk of read cache. The host-initiated operation is performed at a physical location within the first portion of the memory device corresponding the physical address.