Abstract: A method, computer program product, and computer system for disk management in a distributed storage system. The distributed storage system comprises a plurality of disks within a main disk ring, where the disks store target data. In one embodiment, the method comprises dividing the target data into cold target data and hot target data, and grouping one or more disks within the main disk ring into a cold data disk ring and the remaining one or more disks within the main disk ring into a hot data disk ring. The method further comprises migrating the cold target data on disks not within the cold data disk ring onto disks within the cold data disk ring while migrating the hot target data on disks not within the hot data disk ring onto disks within the hot data disk ring, and reducing a spinning rate of disks within the cold data disk ring.

Abstract: Embodiments of the present invention provide a method, system, and computer program product for allocating storage extents. Extent input/output information pertaining to an extent on a storage device is received, by a computer, where the extant input/output information includes an access rate of data stored on the extent. The computer determines one or more periods of time where the input/output information exceeds a preconfigured threshold. The computer generates one or more of a first policy and a second policy based on the determined one or more periods where the first policy includes allocating the extent to a high performance disk within a tier storage system when data is stored during the determined periods and the second policy includes reallocating the extent from a low performance disk within the tier storage system to a high performance storage device within the tier storage system during the one or more determined periods.

Abstract: Balancing resource usage for client applications workload and data merge optimization of the backend for both a local merge within one server and a merge across multiple servers is determined based on previous resource usage pattern in a distributed storage system.

Abstract: Embodiments of the present invention provide a method, system, and computer program product for allocating storage extents. Extent input/output information pertaining to an extent on a storage device is received, by a computer, where the extant input/output information includes an access rate of data stored on the extent. The computer determines one or more periods of time where the input/output information exceeds a preconfigured threshold. The computer generates one or more of a first policy and a second policy based on the determined one or more periods where the first policy includes allocating the extent to a high performance disk within a tier storage system when data is stored during the determined periods and the second policy includes reallocating the extent from a low performance disk within the tier storage system to a high performance storage device within the tier storage system during the one or more determined periods.

Abstract: An SVC cluster manages a plurality of storage devices and includes a plurality of SVCs interconnected via a network, each SVC acting as a separate node. A new configuration node is activated in response to configuration node failures. The new configuration node retrieves client subscription information about events occurring in storage devices managed by the SVC cluster from the storage devices. In response to events occurring in the storage device managed by the SVC cluster, the new configuration node obtains storage device event information from a storage device event monitoring unit. The new configuration node sends storage device events to clients who have subscribed to this information according to subscription information obtained. The storage device is not installed in the original configuration node.

Abstract: A method, computer program product, and computer system for disk management in a distributed storage system, the distributed storage system comprises a plurality of disks within a main disk ring, and store target data. In one embodiment, the method comprises dividing the target data into cold target data and hot target data, and grouping one or more disks within the main disk ring into a cold data disk ring and the remaining one or more disks within the main disk ring into a hot data disk ring. The method further comprises migrating the cold target data on disks not within the cold data disk ring onto disks within the cold data disk ring while migrating the hot target data on disks not within the hot data disk ring onto disks within the hot data disk ring, and reducing a spinning rate of disks within the cold data disk ring.

Abstract: A technique for managing a data replication mode between a primary storage device and a secondary storage device includes in response to a data replication state between the primary storage device and the secondary storage device satisfying a first predetermined condition, selecting at least one candidate logical unit from a plurality of logical units implementing synchronous replication in the primary storage device at least according to priority information of the plurality of logical units. A data replication mode of the at least one candidate logical unit is then modified from synchronous replication to asynchronous replication.

Abstract: A method, computer program product, and computer system are disclosed for disk management in a distributed storage system, wherein the distributed storage system comprises a plurality of disks within a main disk ring, and the disks store target data. In one embodiment, the method comprises dividing the target data into cold target data and hot target data, and grouping one or more disks within the main disk ring into a cold data disk ring and the remaining one or more disks within the main disk ring into a hot data disk ring, based on the cold target data's and the hot target data's positions on disks. The method further comprises migrating the cold target data on disks not within the cold data disk ring onto disks within the cold data disk ring while migrating the hot target data on disks not within the hot data disk ring onto disks within the hot data disk ring, and reducing a spinning rate of disks within the cold data disk ring.

Abstract: A technique for managing a data replication mode between a primary storage device and a secondary storage device includes in response to a data replication state between the primary storage device and the secondary storage device satisfying a first predetermined condition, selecting at least one candidate logical unit from a plurality of logical units implementing synchronous replication in the primary storage device at least according to priority information of the plurality of logical units. A data replication mode of the at least one candidate logical unit is then modified from synchronous replication to asynchronous replication.

Abstract: A self-image capturing method includes a user activating a capturing device, controlling a light detecting device to detect ambient light intensity around an electronic device, determining whether the light intensity detected by the light detecting device is less than a predetermined value, activating the infrared capturing device when determining that the light intensity detected by the light detecting device is less than the predetermined value, controlling the capturing device to capture a selfie image of the user in response to an operation from the user, controlling the infrared capturing device to capture an infrared selfie image, and synthesizing the two captured images into a single selfie image.

Abstract: Embodiments of the present invention provide methods, computer systems, and computer program products for adjusting allocation of a storage device. In one embodiment, a first part of the storage device is allocated to tiering storage, and a second part of the storage device is allocated to cache storage. Operating statuses of the first part and second part are collected. A performance measure of the first part is obtained based on the operating status of the first part, and a performance measure of the second part is obtained based on the operating status of the second part. Allocation of a capacity of the storage devices is adjusted between the first part and the second part based on the performance measures of the first part and the second part.

Abstract: As disclosed herein a method, executed by a computer, includes analyzing historical I/O data, corresponding to one or more applications, to determine an expected available bandwidth for a plurality of storage devices of a distributed storage system, and generating a data retrieval plan for the plurality of storage devices storage devices based on a historical I/O access pattern and according to the expected available bandwidth for the plurality of storage devices. The method further includes accessing data for a backend computational job from the plurality of storage devices according to the data retrieval plan, and throttling I/O throughput for the backend computational job according to the expected available bandwidth for the plurality of storage devices. A computer system and computer program product corresponding to the above method are also disclosed herein.

Abstract: In an approach for processing a data block, a processor determines a first performance index of a first data node, wherein a first copy of the data block is stored on the first data node, wherein the first copy of the data block is a portion included in a data object. A processor determines a second performance index of a second data node, wherein a second copy of the data block is stored on the second data node. A processor processes the first copy of the data block using a MAP algorithm in response to the first performance index being greater than, according to a predefined threshold, the second performance index. A processor generates a processed result of the data object using a REDUCE algorithm based on, at least, the processed first copy of the data block.

Abstract: Embodiments of the present invention provide a method, system, and computer program product for allocating storage extents. Extent input/output information pertaining to an extent on a storage device is received, by a computer, where the extant input/output information includes an access rate of data stored on the extent. The computer determines one or more periods of time where the input/output information exceeds a preconfigured threshold. The computer generates one or more of a first policy and a second policy based on the determined one or more periods where the first policy includes allocating the extent to a high performance disk within a tier storage system when data is stored during the determined periods and the second policy includes reallocating the extent from a low performance disk within the tier storage system to a high performance storage device within the tier storage system during the one or more determined periods.

Abstract: A touch-sensitive push-button includes a button, a capacitor arranged on a top side of the button, a circuit board arranged on a bottom side of the button, and a switch arranged between the button and circuit board. The switch and the capacitor are electrically coupled to each other in parallel. The switch changes from an electrical OFF state to an electrical ON state when the button is pressed, thereby causing the capacitor to be short-circuited.

Abstract: A mechanism is provided for registering a Common Information Model (CIM) provider to at least one Common Information Model Object Manager (CIMOM). The CIMOM pre-stores at least one class definition. The CIMOM sends information to the Common Information Model (CIM) provider in order for the CIM provider to determine the at least one CIMOM existing in a network. The CIMOM sends the at least one class definition stored in the CIMOM in order for the CIM provider to determine if the CIMOM comprises a class definition suitable for the CIM provider to operate. Responsive to the CIM provider determining that the CIMOM comprises a suitable class definition, the CMOM registers the CIM provider by recording an identifier of the CIM provider under the name of the class definition suitable to the CIM provider in the at least one CIMOM.

Abstract: A storage system is dynamically reconfigured. The storage system includes storage pools that each include one or more storage disks. Storage pools to be expanded are determined as target storage pools. For the target storage pools, source storage disks to be moved into the target storage pools are determined from other storage pools than the target storage pools in the storage system. The source storage disks are migrated to the respective target storage pools.

Abstract: A distributed storage system places data in a time-based manner. The distributed storage system comprises a plurality of storage nodes for storing user data, and each user in at least one user is assigned a storage node sub-set for storing user data thereof. The distributed storage system monitors and records user accesses on storage nodes. The distributed storage system calculates a time-based access pattern of a user and time-based access patterns of the storage nodes outside the storage node sub-set of the user in the distributed storage system according to recorded user accesses. The distributed storage system adjusts the storage node sub-set of the user according to the time-based access pattern of the user and the time-based access patterns of the storage nodes outside the storage node sub-set of the user in the distributed storage system.

Abstract: The invention provides a method and devices for disk management in distributed storage system, wherein the distributed storage system comprises a plurality of disks within a main disk ring, the disks store target data, the method comprising: dividing the target data into cold target data and hot target data; grouping on or more disks within the main disk ring into a cold data disk ring and the remaining one or more disks into a hot data disk ring, based on the cold target data's and the hot target data's positions on disks; migrating the cold target data on disks not within the cold data disk ring onto disks within the cold data disk ring while migrating the hot target data on disks not within the hot data disk ring onto disks within the hot data disk ring; and reducing spinning rates of disks within the cold data disk ring.

Abstract: An SVC cluster manages a plurality of storage devices and includes a plurality of SVCs interconnected via a network, each SVC acting as a separate node. A new configuration node is activated in response to configuration node failures. The new configuration node retrieves client subscription information about events occurring in storage devices managed by the SVC cluster from the storage devices. In response to events occurring in the storage device managed by the SVC cluster, the new configuration node obtains storage device event information from a storage device event monitoring unit. The new configuration node sends storage device events to clients who have subscribed to this information according to subscription information obtained. The storage device is not installed in the original configuration node.