In a server system, a host computing platform can have a processing unit separate from the host processor to detect and respond to failure of the host processor. The host computing platform includes a memory to store data for the host processor. The processing unit has an interface to the host processor and the memory and an interface to a network external to the host processor and has access to the memory. In response to detection of failure of the host processor, the processing unit migrates data from the memory to another memory or storage.

A data management method causes a computer to execute processing including: creating, when a predetermined data processing program performs data processing, based on an access frequency to a data store, high-frequency state item list information obtained by listing high-frequency state items of which the access frequency is high; determining, when state information that includes a value of the high-frequency state item is written to the data store, whether or not the state information corresponds to the high-frequency state item with reference to the high-frequency state item list information; grouping and writing pieces of the state information of a plurality of the high-frequency state item.

Presently disclosed are systems and methods for generating customized filtered-and-partitioned market-data feeds. In an embodiment, an output-feed profile is maintained in data storage at a market-data-processing device (MDPD). The output-feed profile specifies a subset of ticker symbols and a ticker-symbol-based feed-partitioning scheme. An input feed of order-book updates to ticker symbols is received at the MDPD from an upstream device. At the MDPD, a customized market-data output feed is generated according to the maintained output-feed profile at least in part by filtering the input feed down to the order-book updates to ticker symbols in the specified subset and partitioning the filtered feed according to the specified ticker-symbol-based feed-partitioning scheme. The customized market-data output feed is transmitted from the MDPD to a downstream device.

Presently disclosed are systems and methods for generating customized filtered-and-partitioned market-data feeds. In an embodiment, an output-feed profile is maintained in data storage at a market-data-processing device (MDPD). The output-feed profile specifies a subset of ticker symbols and a ticker-symbol-based feed-partitioning scheme. An input feed of order-book updates to ticker symbols is received at the MDPD from an upstream device. At the MDPD, a customized market-data output feed is generated according to the maintained output-feed profile at least in part by filtering the input feed down to the order-book updates to ticker symbols in the specified subset and partitioning the filtered feed according to the specified ticker-symbol-based feed-partitioning scheme. The customized market-data output feed is transmitted from the MDPD to a downstream device.

A memory system having a plurality of memory components and a controller, operatively coupled to the plurality of memory components to: store data in the memory components; communicate with a host system via a bus; service the data to the host system via communications over the bus; communicate with a processing device that is separate from the host system using a message passing interface over the bus; and provide data access to the processing device through communications made using the message passing interface over the bus.

A fleet of query accelerator nodes is established for a data store. Each accelerator node caches data items of the data store locally. In response to determining that an eviction criterion has been met, one accelerator node removes a particular data item from its local cache without notifying any other accelerator node. After the particular data item has been removed, a second accelerator node receives a read query for the particular data item and provides a response using a locally-cached replica of the data item.

A hybrid memory includes cache of relatively fast and durable dynamic, random-access memory (DRAM) in service of a larger amount of relatively slow and wear-sensitive flash memory. An address buffer on the module maintains a static, random-access memory (SRAM) cache of addresses for data cached in DRAM.

Disclosed is a computer implemented method to manage a cache, the method comprising, determining that a primary application opens a first file, wherein opening the first file includes reading the first file into a file cache from a storage. The method also includes, setting a first monitoring variable in the primary application process proc structure, wherein the first monitoring variable is set in response to the primary application opening the first file, and the first monitoring variable records a set of operations completed on the first file by the primary application. The method comprises a first read of the first file being at a beginning of the first file. The method includes identifying that the first file is read according to a pattern that includes reading the first file sequentially and reading the first file entirely and removing the first file from the file cache.

A memory module comprises a volatile memory subsystem, a non-volatile memory subsystem, and a module controller coupled to the volatile memory subsystem and to the non-volatile memory subsystem. The module controller is configurable to control data transfers between the volatile memory subsystem and the non-volatile memory subsystem. The module controller includes a data selection circuit configurable to pre-search data transferred from the non-volatile memory with respect to one or more search criteria before providing the pre-select data relevant to the one or more search criteria to the volatile memory subsystem.

A memory module comprises a volatile memory subsystem, a non-volatile memory subsystem, and a module controller coupled to the volatile memory subsystem and to the non-volatile memory subsystem. The module controller is configurable to control data transfers between the volatile memory subsystem and the non-volatile memory subsystem. The module controller includes a data selection circuit configurable to pre-search data transferred from the non-volatile memory with respect to one or more search criteria before providing the pre-select data relevant to the one or more search criteria to the volatile memory subsystem.