International Business Machines Corporation

Wendy Ann Belluomini

Binny Sher Gill

Hung Cai Ngo

Robert K Montoye

James Lee Hafner

Himabindu Pucha

Chandler Todd McDowell

Joseph S Glider

Anna Povzner

Steven Robert Hetzler

Dean Hildebrand

Karan Gupta

Jun Sawada

Renu Tewari

Daniel Felix Smith

Michael Anthony Ko

Venu Nayar

Aniket Mukul Saha

James R Kraemer

Robert R Friedlander

David Darden Chambliss

Rui Zhang

Brian Dennis McKean

Samuel Scott Adams

Donald Roman Humlicek

Douglas William Dewey

James Christopher Wyllie

Andrew Kenneth Martin

Kevin Lee Kidney

Veera W Deenadhayalan

Assaf Nitzan

Edi Shmueli

Theresa Lynn Segura

Ramyanshu Datta

Jorge Guerra Delgado

Ying Liu

Jente Benedict Kuang

Sani Richard Nassif

Bret S Weber

Pin Zhou

Kenneth F Day, Iii

Krishnakumar Rao Surugucchi

John E Bish

Eyal Lotem

Xifeng Yan

Amar Phanishayee

Eyal Lotern

Veera c/o Ibm Uk Limited Intellectual Property Law Deenadhayalan

A sensor system comprises: an energy storage device electrically coupled to an intermittent energy release device that causes the energy storage device to release stored energy intermittently; a sensor electrically coupled to the energy storage device, where the sensor detects physical events occurring at a physical device and is intermittently powered by electrical energy received from the energy storage device; a synaptic neural network core electrically coupled to the sensor, where the synaptic neural network core converts sensor readings into an object that describes the physical events occurring at the physical device; a transponder electrically coupled to the synaptic neural network core; and a storage buffer within the transponder, where the storage buffer stores the object for transmission from the transponder to a monitoring system, where the intermittent energy release device provides power to the sensor in response to the transponder transmitting the object to the monitoring system.

Synaptic neural network core based sensor system

Embodiments relate to supporting transaction data committed to a stable storage. Committed data in the cluster is stored in the persistent cache layer and replicated and stored in the cache layer of one or more secondary nodes. One copy is designated as a master copy and all other copies are designated as replica, with an exclusive write lock assigned to the master and a shared write lock extended to the replica. An acknowledgement of receiving the data is communicated following confirmation that the data has been replicated to each node designated to receive the replica. Managers and a director are provided to support management of the master copy and the replicas within the file system, including invalidation of replicas, fault tolerance associated with failure of a node holding a master copy, recovery from a failed node, recovered of the file system from a power failure, and transferring master and replica copies within the file system.

Write performance in fault-tolerant clustered storage systems

A sensor system comprises: an energy storage device; an intermittent energy release device electrically coupled to the energy storage device, wherein the intermittent energy release device causes the energy storage device to release stored energy intermittently; a sensor electrically coupled to the energy storage device; a register electrically coupled to the sensor, wherein the register stores readings from the sensor; a synaptic neural network core electrically coupled to the sensor, wherein the synaptic neural network core converts the readings from the sensor into a synthetic context-based object that is derived from the readings and a context object; a transponder electrically coupled to the synaptic neural network core; and a storage buffer within the transponder, wherein the storage buffer stores the synthetic context-based object for transmission by the transponder to a monitoring system.

Embodiments of the invention relate to supporting transaction data committed to a stable storage. Committed data in the cluster is stored in the persistent cache layer and replicated and stored in the cache layer of one or more secondary nodes. One copy is designated as a master copy and all other copies are designated as replica, with an exclusive write lock assigned to the master and a shared write lock extended to the replica. An acknowledgement of receiving the data is communicated following confirmation that the data has been replicated to each node designated to receive the replica. Managers and a director are provided to support management of the master copy and the replicas within the file system, including invalidation of replicas, fault tolerance associated with failure of a node holding a master copy, recovery from a failed node, recovered of the file system from a power failure, and transferring master and replica copies within the file system.

Maintaining high availability of objects for both read and write transactions. Secondary copies of cached objects are created and maintained on disks of a secondary caching node and in remote data storage. In response to an update request, the secondary copies of cached objects are updated. Secondary cached objects are synchronously invalidated in response to the update request, and the update is asynchronously propagated to a secondary caching node.

Reducing memory overhead of highly available, distributed, in-memory key-value caches

A multiplier circuit comprises a fused Booth encoder multiplexer which produces partial product bits, a tree which uses the partial product bits to generate partial products, and an adder which uses the partial products to generate intermediate sum and carry results for a multiplication operation. The fused Booth encoder multiplexer utilizes encoder-selector cells having a logic tree which carries out a Boolean function according to a Booth encoding and selection algorithm to produce one of the partial product bits at a dynamic node, and a latch connected to the dynamic node which maintains the value at an output node. The encoder-selector cells operate in parallel to produce the partial product bits generally simultaneously. A given one of the encoder-selector cells has a unique set of both multiplier operand inputs and multiplicand operand inputs, and produces a single partial product bit.

Fused booth encoder multiplexer

In one embodiment, a configuration adviser provides configuration options for a multi-tiered storage system that includes a number of different storage tiers, each of which include storage devices of a particular storage type. Data access information for storage extents to be stored in the storage system are received. Resource information for available storage tiers in the storage system to place the storage extents on are also received. A cost incurred by the storage system for placing each of the storage extents on each of the storage tiers is determined. Each storage extent is assigned to a particular one of the storage tiers that would incur the lowest cost to the storage system for storing the storage extent. For each storage tier, a minimum number of storage devices are selected, within the assigned storage tier, that would satisfy data access and capacity requirements for all storage extents assigned to that tier.

Multi-tier storage system configuration adviser

Embodiments of the invention relate to dynamic power management of storage volumes and disk arrays in a storage subsystem to mitigate loss of performance resulting from the power management. The volumes and arrays are prioritized, and in real-time power is selectively reduced in response to both the prioritization and an energy savings goal. A feedback loop is provided to dynamically measure associated power gain based upon a lowering of power consumption, and device selection may be adjusted based upon received feedback.

Method for on-demand energy savings by lowering power usage of at least one storage device in a multi-tiered storage system

Embodiments of the invention relate to throttling accesses to a flash memory device. The flash memory device is part of a storage system that includes the flash memory device and a second memory device. The throttling is performed by logic that is external to the flash memory device and includes calculating a throttling factor responsive to an estimated remaining lifespan of the flash memory device. It is determined whether the throttling factor exceeds a threshold. Data is written to the flash memory device in response to determining that the throttling factor does not exceed the threshold. Data is written to the second memory device in response to determining that the throttling factor exceeds the threshold.

Optimized flash based cache memory

On-demand storage system energy savings

Embodiments of the invention are directed to reducing write amplification in a cache with flash memory used as a write cache. An embodiment of the invention includes partitioning at least one flash memory device in the cache into a plurality of logical partitions. Each of the plurality of logical partitions is a logical subdivision of one of the at least one flash memory device and comprises a plurality of memory pages. Data are buffered in a buffer. The data includes data to be cached, and data to be destaged from the cache to a storage subsystem. Data to be cached are written from the buffer to the at least one flash memory device. A processor coupled to the buffer is provided with access to the data written to the at least one flash memory device from the buffer, and a location of the data written to the at least one flash memory device within the plurality of logical partitions. The data written to the at least one flash memory device are destaged from the buffer to the storage subsystem.

Reducing write amplification in a cache with flash memory used as a write cache

Embodiments of the invention enable a storage cache, comprising flash memory devices, to have direct block access to the flash such that the physical block addresses are presented to the storage system's cache layer, which thereby controls the storage cache data stream. An aspect of the invention includes a caching storage system. The caching storage system comprises a plurality of flash memory units organized in an array configuration. Each of the plurality of flash memory units includes at least one flash memory device and a flash unit controller. Each flash unit controller provides the caching storage system with direct physical block access to its corresponding at least one flash memory device. The caching storage system further comprises a storage cache controller. The storage cache controller selects physical block address locations (within a flash memory device) to be erased where data are to be written, issues erase commands to a flash unit controller corresponding to the selected physical block address locations, and issues page write operations to a set of erase blocks.

Storage system cache using flash memory with direct block access

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San Jose, CA, United States of America

Wendy Ann Belluomini