Embodiments of the present disclosure provide a method of storage management, a storage system and a computer program product. The method comprises determining whether a number of I/O requests for a first page in a disk of a storage system exceeds a first threshold. The method further comprises: in response to determining that the number exceeds the first threshold, caching data in the first page to a first cache of the storage system; and storing metadata associated with the first page in a Non-Volatile Dual-In-Line Memory Module (NVDIMM) of the storage system.

A computer system of a service provider includes a processing unit executing a thread issued by a user and a random access memory (RAM) cache disposed external to the processing unit and operatively coupled to the processing unit to store data accessed or to be accessed by the processing unit. The processing unit includes control circuitry configured to, in response to receiving an access request while the thread is being executed, determine whether the thread is allowed to access the RAM cache according to a service level agreement (SLA) level established between the service provider and the user, and when the thread is RAM cacheable, access the RAM cache.

According to one embodiment of the present invention, a system for processing a database query stores one or more result sets for one or more first database queries in a data store. The system receives a second database query and compares the second database query to the one or more first database queries to determine presence of a corresponding result set in the data store for the second database query. The system provides the corresponding result set from the data store for the second database query based on the comparison. Embodiments of the present invention further include a method and computer program product for processing a database query in substantially the same manners described above.

The disclosed technology provides a system and method that improves interlaced magnetic recording (IMR) data throughput in vibration in storage systems. In one implementation, a method includes determining whether there are write retry operations in the IMR storage device, determining whether bottom track caching space is available responsive to determining whether there are write retry operations in the IMR storage device, performing a vibration detection scheme to identify vibration events responsive to determining whether bottom track caching space is available, determining if a number of vibration events is above a predetermined threshold, and writing data to available bottom track caching space responsive to determining if the number of vibration events is above a predetermined threshold.

Systems and methods of building massively parallel computing systems using low power computing complexes in accordance with embodiments of the invention are disclosed. A massively parallel computing system in accordance with one embodiment of the invention includes at least one Solid State Blade configured to communicate via a high performance network fabric. In addition, each Solid State Blade includes a processor configured to communicate with a plurality of low power computing complexes interconnected by a router, and each low power computing complex includes at least one general processing core, an accelerator, an I/O interface, and cache memory and is configured to communicate with non-volatile solid state memory.

A computing device may include at least one memory and a processor cooperating therewith to receive a streaming base disk image from a base disk on a provisioning server over a network upon booting up the computing device, and operate a machine session on the computing device from the streaming base disk image. Furthermore, while the machine session operates on the computing device from the streaming base disk image, the processor may further cooperate with the at least one memory to download and store the base disk image over the network from the provisioning server to a persistent read cache in the at least one memory that persists on the client device after rebooting, and store modifications to the streaming base disk image in a non-persistent write cache in the at least one memory that does not persist on the client device after rebooting.

An example method for performing cache replacement in a caching medium for a data storage system can include providing an SSD cache, providing an LRU data structure including buckets for managing the SSD cache, and providing cache headers for managing the cache lines. The method can include assigning two or more cache headers to a same bucket of the LRU data structure, and arranging the cache headers in a linked list based on access time. A cache header for an LRU cache line is a tail node of the linked list. The method can further include providing an LFU data structure including frequency buckets, assigning the tail node of the linked list of the same bucket of the LRU data structure to a frequency bucket based on access frequency, and selecting an LFU cache line for cache replacement using the LFU data structure.

Provided are a computer program product, system, and method for considering a frequency of access to groups of tracks and density of the groups to select groups of tracks to destage. One of a plurality of densities for one of a plurality of groups of tracks is incremented in response to determining at least one of that the group is not ready to destage and that one of the tracks in the group in the cache transitions to being ready to destage. A determination is made of a group frequency indicating a frequency at which tracks in the group are modified. At least one of the density and the group frequency is used for each of the groups to determine whether to destage the group. The tracks in the group in the cache are destaged to the storage in response to determining to destage the group.

Methods for programming sense flags may include programming memory cells coupled to first data lines in a main memory array, and programming memory cells coupled to second data lines in the main memory array while programming memory cells coupled to data lines in a flag memory array with flag data indicative of the memory cells coupled to the second data lines being programmed. Methods for sensing flags may include performing a sense operation on memory cells coupled to first data lines of a main memory array and memory cells coupled to data lines of a flag memory array, and determining a program indication of memory cells coupled to second data lines of the main memory array from the sense operation performed on the memory cells coupled to the data lines of the flag memory array.

A system includes a read/write module and a caching module. The read/write module is configured to access a first portion of a recording surface of a rotating storage device. Data is stored on the first portion of the recording surface of the rotating storage device at a first density. The caching module is configured to cache data on a second portion of the recording surface of the rotating storage device at a second density. The second portion of the recording surface of the rotating storage device is separate from the first portion of the recording surface of the rotating storage device. The second density is less than the first density.