Abstract: Techniques pertaining to adjusting the operation frequency of a DRAM are disclosed. According to one embodiment, the DRAM operation frequency adjusting system includes a statistic module counting effective operations of a DRAM to obtain a bandwidth utilization rate of the DRAM at a present operation frequency; a parameter configuration module including a target frequency configuration sub-module configured to generate a target operation frequency; and a frequency switch controller for switching a present operation frequency of the DRAM to the target operation frequency. The invention adjusts the operation frequency of a DRAM according to the application environment, and creates a balance between performance and power consumption of DRAMs, and thus improves operation speed of system-on-chips as well as decreases the power consumption.

Abstract: A moving window history of at least one previous data address accessed by a processor is maintained, the at least one previous data address in the history each being associated with an index. A difference between a current data address and one of the at least one previous data address in the history is determined. The difference and the index associated with the one of the at least one previous data address in the history are provided as a representation of the current address.

Abstract: Integrated circuit systems include a non-volatile memory device (e.g, flash EEPROM device) and a memory processing circuit. The memory processing circuit is electrically coupled to the non-volatile memory device. The memory processing circuit is configured to reallocate addressable space within the non-volatile memory device. This reallocation is performed by increasing a number of physical addresses within the non-volatile memory device that are reserved as redundant memory addresses, in response to a capacity adjust command received by the memory processing circuit.

Abstract: A computer system and method for caching configuration information for use in mounting and/or unmounting snapshot LUNs of a network-based storage system are disclosed. During a first request to mount a snapshot LUN, a discovery operation is performed at a host system to discover various configuration information used in mounting and unmounting various LUNs of a storage system to a host system. The configuration information is used to process the first request and then the configuration information is cached. During a subsequent request to mount a second snapshot LUN, the cached configuration information can be used to mount the second snapshot LUN, thereby avoiding a second discovery operation.

Abstract: A recording and/or reproducing method, a recording and/or reproducing apparatus, and an information storage medium are provided. The method of recording data to an information storage medium includes: according to a change in a method of using the information storage medium, rearranging the order of a first information structure with a variable size and a second information structure with a fixed size, both of which are included in management information of the information storage medium, so that the first information structure with the variable size can be positioned following the second information structure with the fixed size; and recording the rearranged management information on the information storage medium. According to the method and apparatus, recording management information can be found in a fixed location of a finalized information storage medium, thereby allowing the recording management information to be found easily and quickly.

Abstract: Mechanisms are provided for detecting changes in virtual storage device configurations. The mechanisms detect an event corresponding to a change in configuration of a virtual storage device. The virtual storage device is comprised of a plurality of portions of a plurality of physical storage devices. The mechanisms further, in response to detecting the event, determine if the change in configuration of the virtual storage device results in a change in the types of physical storage devices that are part of the virtual storage device. Moreover, the mechanisms further transmit a notification, in response to a determination that the change in configuration of the virtual storage device results in a change in the types of physical storage devices that are part of the virtual storage device, of the results of the change in configuration of the virtual storage device to one or more registered recipients registered to receive such notifications.

Abstract: Multiple application threads write to the same file in parallel. The file is written to on a file cluster-by-file cluster basis. For each file cluster of a number of file clusters of the file, a block of a memory cluster is allocated to an application thread, where the memory cluster corresponds to the file cluster, and the block is written to by the application thread until the block is finished, until all the blocks of the memory cluster are finished. A block may be finished where the application thread has completely written to the block, or the application thread has no further data to write to the block. Thereafter, the memory cluster is registered within a queue, from which it is read by a file writer thread, which writes the memory cluster to the file cluster. Each application thread that is to write to the file performs this process.

Abstract: A method and computer program product for a multicast data mirroring method including defining a multicast group within a local area network. The multicast group includes a first synchronous storage target and one or more asynchronous storage targets. The synchronous storage target is a member of a synchronously-mirrored storage group including at least a second synchronous storage target and a storage initiator device. A write request for storing a data segment within the synchronously-mirrored storage group is received on the storage initiator device. The data segment is written to the first synchronous storage target and the second synchronous storage target. The data segment is multicast to the asynchronous storage targets included within the multicast group.

Abstract: A recursive logical partition real memory map mechanism is provided for use in address translation. The mechanism, which is provided in a data processing system, receives a first address based on an address submitted from a process of a currently active logical partition. The first address is translated into a second address using a recursive logical partition real memory (RLPRM) map data structure for the currently active logical partition. The memory is accessed using the second address. The RLPRM map data structure provides a plurality of translation table pointers, each translation table pointer pointing to a separate page table for a separate level of virtualization in the data processing system with the data processing system supporting multiple levels of virtualization.

Abstract: A method for caching terminology data, including steps of: receiving a terminology request; determining that the terminology request is related to at least one uncached terminology concept; retrieving a complete concept set of the terminology concept as a cache unit, wherein the complete concept set includes the terminology concept, all other terminology concepts which are directly correlated or indirectly correlated through a non-transitive relationship to the terminology concept, properties of each terminology concept, and the non-transitive relationship between each terminology concept; retrieving transitive relationship information for the complete concept set, the transitive relationship information at least including identifiers of terminology concepts which are correlated through the transitive relationship to each terminology concept in the complete concept set; and caching the cache unit and the transitive relationship information of the cache unit. A corresponding device caches terminology data.

Abstract: Systems and methods for managing storage virtualization in a storage infrastructure are provided. The method comprises examining storage virtualization configurations across a data storage infrastructure having one or more data storage resources, such that configuration data associated with the storage virtualization configurations applied to the one or more data storage resources is stored in a configuration repository; analyzing the configuration data to detect storage virtualization policy inconsistencies across the data storage infrastructure; reporting potential problems associated with applying the storage virtualization configurations to said one or more data storage resources; and automatically implementing recommendations for corrective action to improve storage virtualization, in response to detecting the virtualization policy inconsistencies.

Abstract: One embodiment is main memory that includes a combination of non-volatile memory (NVM) and dynamic random access memory (DRAM). An operating system migrates data between the NVM and the DRAM.

Abstract: A data storage system including at least one storage controller having a first color policy and operative to store data onto a first data storage unit at a primary site as part of a current color of the primary site, at least one storage controller having a second color policy and operative to store data onto a second data storage unit at the primary site as part of the current color, and a color control node operative to provide each of the controllers with new color information while maintaining the integrity of dependent writes across color boundaries.

Abstract: A method and apparatus for adjusting the performance of a memory system is provided. A memory system comprises a master device and a slave device. A memory channel couples the master device to the slave device such that the slave device receives the system operating information from the master device via the memory channel. The slave device further includes tuning circuitry within the slave device such that the performance of the memory system is improved.

Abstract: An enhanced mechanism for loading entries into a translation lookaside buffer (TLB) in hardware via indirect TLB entries. In one embodiment, if no direct TLB entry associated with the given virtual address is found in the TLB, the TLB is checked for an indirect TLB entry associated with the given virtual address. Each indirect TLB entry provides the real address of a page table associated with a specified range of virtual addresses and comprises an array of page table entries. If an indirect TLB entry associated with the given virtual address is found in the TLB, a computed address is generated by combining a real address field from the indirect TLB entry and bits from the given virtual address, a page table entry (PTE) is obtained by reading a word from a memory at the computed address, and the PTE is loaded into the TLB as a direct TLB entry.

Abstract: A system and method includes steps or acts of: organizing table partitions in logical order; presenting the partition table numbers and their current ending values in logical order to a user; receiving an alter command from the user, the alter command specifying at least one logical partition number and its corresponding ending value; internally matching the specified logical partition number to its corresponding physical partition number; altering the physical partitioning of the table by manipulating one or more current ending values of partitions by altering the current ending value of the physical partition to which the specified logical partition is associated, such that new ending values are generated; and automatically generating at least one data definition language statement corresponding to the alter command, using the new ending value.

Abstract: The present disclosure includes methods and devices for operating a solid state drive. One method embodiment includes mirroring programming operations such that data associated with a programming operation is programmed to two or more locations in memory of the solid state drive. The method also includes ceasing to mirror programming operations upon an occurrence of a particular event.

Abstract: Computer implemented methods, computer program products and computer systems synchronize copies of a virtual disk. A record of blocks that are modified during an access session of a copy of the virtual disk is maintained. For each partition of the virtual disk, a file system level indication of currently relevant blocks is obtained. Only those blocks that were modified during the access session and are currently relevant are copied to at least one additional copy of the virtual disk.

Abstract: An adapter apparatus has a function of determining the type of a memory card, by communicating with the memory card at plural communication speeds and determining whether or not there is a response therefrom. A communication speed setting unit has a function of setting plural communication speeds for communication with the memory card, and a response determining unit determines whether or not there is a response to a type determination signal. A type determining unit determines the type of the memory card based on the communication speed set by the communication speed setting unit and whether or not there is a response to the type determination signal sent at the communication speed.

Abstract: There is a journal area and one or more logical volumes comprising a first logical volume. The journal area is a storage area in which is stored a journal data element, which is a data element that is stored in any storage area of a plurality of storage areas configuring a logical volume, or a data element that is written to the storage area. A controller has a size receiver that receives a write unit size, which is the size of a write data element received from a computer, and a size setting unit that sets the received write unit size in a memory for one or more logical volumes. The size of a journal data element stored in a journal area based on the set write unit size is the write unit size.