Abstract: A technique that provides the ability to copy or move a volume that includes one or more quota structures, by using logical replication, where the volume and any quota structures in it are immediately accessible upon completion of the copy/move operation, and where the quota structures' usage control functionality is immediately functional and reliable upon completion of the copy/move operation. A user does not have to reinitialize the quota mechanism or invoke a quota scanner at the destination.

Abstract: A method and system to improve the operations of an integrated non-transparent bridge device (NTB) that is coupled to another NTB device or Root Port device. The integrated NTB device has logic to maintain ordering of interrupts to be sent to the remote Root Port or NTB device. The integrated NTB device allocates a contiguous portion of the memory for both the primary Base Address Register 0 associated with the integrated NTB device and the secondary BAR0 associated with the remote NTB device. The integrated NTB device has logic to report the size of the primary BAR0 as the combined size of the primary BAR0 and the size of the secondary BAR0. The integrated NTB device facilitates the dynamic modification of a mapping of each bit of a doorbell register with a respective one of a plurality of interrupt vectors based on a mapping register.

Abstract: A system and method are provided for pooling storage devices in a virtual library for performing a storage operation. A storage management device determines a storage characteristic of a plurality of storage devices with respect to performing a storage operation. Based on a storage characteristic relating to performing the storage operation, the storage management device associates at least two storage devices in a virtual library. The storage management device may continuously monitor the virtual library and detect a change in storage characteristics of the storage devices. When changes in storage characteristics are detected, the storage management device may change associations of the storage device in the virtual library.

Abstract: A method for managing the allocation of memory to one or more applications. The method includes allocating a variety of fixed size memory blocks to a requesting application, each of the fixed size memory blocks being free of header information to maximize memory usage. Free, or unused blocks of data of the same fixed size are maintained in a freelist having a number of block roots corresponding to the number of differently fixed size memory blocks. Each block root stores a root pointer to an unused memory block previously allocated to the application. To conserve memory, each unused memory block will store branch pointers to other identically sized unused memory blocks, thereby forming a sequential chain of unused memory blocks with the block root. Therefore, applications requesting the same sized memory block can re-use previously allocated fixed size memory blocks.

Abstract: Provided are a relocation system and a relocation method capable of relocating a virtual volume that is formed based on thin provisioning while ensuring security against exhaustion of pools. A database stores attribute information for pools and virtual volumes for thin provisioning that exist in a storage device as well as parameters for predicting time period till exhaustion of the pools. When a virtual volume is to be relocated between a plurality of pools, a relocation control section predicts time periods till exhaustion of the pools before and after relocation based on information in the database and determines the relocation is possible or not based on the result of prediction or determines an appropriate relocation plan. This enables control of relocation of virtual volumes.

Abstract: An approach is provided that uses a hypervisor to allocate a shared memory pool amongst a set of partitions (e.g., guest operating systems) being managed by the hypervisor. The hypervisor retrieves memory related metrics from shared data structures stored in a memory, with each of the shared data structures corresponding to a different one of the partitions. The memory related metrics correspond to a usage of the shared memory pool allocated to the corresponding partition. The hypervisor identifies a memory stress associated with each of the partitions with this identification based in part on the memory related metrics retrieved from the shared data structures. The hypervisor then reallocates the shared memory pool amongst the plurality of partitions based on the identified memory stress of the plurality of partitions.

Abstract: A virtualization system, upon judging that a write operation from a higher-level device is an operation to write in the format of the virtual volume, even when the write position of the write operation is in a virtual area different from a virtual area to which an allocated actual area has been allocated, if there is an unused area in the allocated actual area, writes management information to the unused area according to the write operation, and if there is no unused area in the allocated actual area, newly allocates an unallocated actual area, and writes management information to the newly allocated actual area according to the write operation.

Abstract: Compressing and decompressing compressed index lists. One or more index lists include at least a portion of the list that is compressed. A method includes reading an entry from a list. The method further includes determining that the entry indicates the start of a compressed block of the list. The compressed block is compressed using a compression algorithm including a plurality of delta pointers. Each of the delta pointers point to data store entries by reference to a difference from a reference in a previous entry in the list. An entry size indicator is referenced. The entry size indicator is configured to indicate a memory storage size for a delta pointer, and the entry size indicator supports indications for all of fixed storage sizes, variable storage sizes, and run length encoding. The compressed block of the list is decompressed according to the entry size indicator.

Abstract: A method for implementing dynamic refresh protocols for DRAM based cache includes partitioning a DRAM cache into a refreshable portion and a non-refreshable portion, and assigning incoming individual cache lines to one of the refreshable portion and the non-refreshable portion of the cache based on a usage history of the cache lines. Cache lines corresponding to data having a usage history below a defined frequency are assigned to the refreshable portion of the cache, and cache lines corresponding to data having a usage history at or above the defined frequency are assigned to the non-refreshable portion of the cache.

Abstract: In one embodiment, a method is disclosed for allocating memory for a processor unit in a group of processing units. The method can include receiving a memory allocation request where the request can indicate a number of binary segments to be stored. The method can determine if the number indicates a nonstandard allocation, and locate an unallocated memory address based on a multiple of the number if the number indicates a nonstandard allocation. The method can also include locating an unallocated memory address from a pool of memory addresses, where the pool of addresses includes the integer multiples of the binary segments and excludes addresses that are two times the number of binary segments such that the address can be utilized to determine the allocation.

Abstract: An apparatus for controlling operational risk in a data processing system comprises a risk domain segmenter for segmenting the data processing system into a plurality of risk domains, a domain risk threshold selector for selecting a domain risk threshold for at least one of the plurality of risk domains, a system element monitor operable to query the data processing system for an indication of presence of system elements, a risk quantizer for evaluating a system element for element risk and for computing the potential contribution of the element risk to a domain risk total, a risk threshold comparator for comparing the domain risk total with the domain risk threshold, and a domain assignor operable to assign the system element to a risk domain in dependency upon an output of the risk threshold comparator.

Abstract: Methods, systems, and articles for receiving, by a lock-free vector of a computing device, a request from a thread of the computing device to write data to the lock-free vector are described herein. In various embodiments, the lock-free vector may then determine whether the lock-free vector is growing and, if the lock-free vector is not growing, may allocate a first portion of memory of the lock-free vector exclusively to the requesting thread. In some embodiments, the allocating may comprise allocating using a resource allocator of the lock-free vector.

Abstract: Methods, systems, and products are disclosed for enabling memory module slots in a computing system after a repair action, the computing system having a plurality of memory module slots and having at least one memory module installed in one of the memory module slots, that includes: determining, during a boot process for the computing system, whether any of the memory module slots are disabled; and if any of the memory module slots are disabled: retrieving, for each memory module installed in one of the memory module slots, a memory module identifier for that memory module, retrieving, from non-volatile memory of the computing system, previously stored memory module identifiers, determining whether the retrieved memory module identifiers match the previously stored memory module identifiers, and enabling the disabled memory module slots if the retrieved memory module identifiers do not match the previously stored memory module identifiers.

Abstract: A hybrid data storage device includes a solid-state memory device, a disc-type memory device and a hybrid data storage device controller in communication with the solid-state memory device and the disc-type memory device. The hybrid data storage device controller is configured to receive Non-Volatile Memory Host Controller Interface (NVMHCI) commands from a host and use logic to make decisions for the optimization and efficient performance of the solid-state memory device and the disc-type memory device.

Abstract: A semiconductor storage device includes a first nonvolatile memory to store user data of a file, a second nonvolatile memory to store management data of the file, the second nonvolatile memory being different in type from the first nonvolatile memory, and a controller to control read/write of data with respect to the first and second nonvolatile memories.

Abstract: A semiconductor storage device includes a first nonvolatile memory to store user data of a file, a second nonvolatile memory to store management data of the file, the second nonvolatile memory being different in type from the first nonvolatile memory, and a controller to control read/write of data with respect to the first and second nonvolatile memories.

Abstract: Various technologies and techniques are disclosed for providing type stability techniques to enhance contention management. A reference counting mechanism is provided that enables transactions to safely examine states of other transactions. Contention management is facilitated using the reference counting mechanism. When a conflict is detected between two transactions, owning transaction information is obtained. A reference count of the owning transaction is incremented. The system ensures that the correct transaction was incremented. If the owning transaction is still a conflicting transaction, then a contention management decision is made to determine proper resolution. When the decision is made, the reference count on the owning transaction is decremented by the conflicting transaction. When each transaction completes, the reference counts it holds to itself is decremented. Data structures cannot be deallocated until their reference count is zero.

Abstract: Various embodiments for performing truncate operations in nonvolatile memory are described. In one embodiment, an apparatus may include a nonvolatile memory to perform one or more truncate operations on a data file written to the nonvolatile memory and a volatile memory to track a truncate operation performed in the nonvolatile memory. Other embodiments are described and claimed.

Abstract: Methods, systems, and media to enhance memory overflow management by identifying a memory overflow condition associated with execution of a task and adjusting memory allocation for the task to attenuate the memory overflow condition are disclosed. In particular, embodiments reduce the impact of repetitious memory overflow conditions caused by a specific task by increasing the memory allocation for that task. The memory overflow may also be reported to a technical service provider to help the technical service provider identify and fix the code that is responsible for the memory overflow. Many embodiments monitor an extent of the overflow and determine an allocation correction term based upon the extent of the overflow. In some situations, application of a correction term to increase the memory allocation for the task may advantageously eliminate the cause of the memory overflow condition. In further situations, the impact of the memory overflow condition is attenuated.

Abstract: An enhanced flash memory card, including a flash memory for storing a file system a wireless modem for downloading data from a remote computer to the flash memory, and a driver that controls the modem by associating designated flash card file system commands with modem actions to be performed.

Abstract: A semiconductor storage device includes a first nonvolatile memory to store user data of a file, a second nonvolatile memory to store management data of the file, the second nonvolatile memory being different in type from the first nonvolatile memory, and a controller to control read/write of data with respect to the first and second nonvolatile memories.

Abstract: Storage using resemblance of data segments is disclosed. It is determined that a new segment resembles a second prior stored segment wherein the second prior stored segment is represented as a first stored delta and a first prior stored segment. A second delta between the new segment and the prior stored segment is determined. A representation of the new segment based at least in part on the second delta is stored.

Abstract: A thin provisioning storage system is able to present a thin provisioned volume to a computer, such that the computer stores data to the volume as if storage space on disk drives was already allocated for the volume. Upon receiving a write request from the computer, in which the write request is directed to an area of the volume for which storage space on the disk drives has not yet been allocated, the storage system allocates new space on the disk drives. When allocating the new space, the storage system obtains a designated performance level for the volume, and determines a number of storage extents to be allocated to the volume based upon the determined performance level. The storage system also is able to take into account performance metrics for the disk drives and/or array groups when selecting locations from which to allocate the storage extents.

Abstract: A design structure embodied in a machine readable storage medium for designing, manufacturing, and/or testing a memory switching data processing system is provided. The memory switching data processing system includes one or more central processing units (‘CPUs’); random access memory organized in at least two banks of memory modules; one or more memory buses providing communications paths for data among the CPUs and the memory modules; and a flexibly configurable memory bus switch comprising a first configuration adapting the first CPU to a first bank of memory modules and a second CPU to a second bank of memory modules and a second configuration adapting the first CPU to both the first bank of memory modules and the second bank of memory modules.

Abstract: Embodiments of the invention relate generally to incremental computing. Specifically, embodiments of the invention include systems and methods that provide for the concurrent processing of multiple, incremental changes to a data value while at the same time monitoring and/or enforcing threshold values for that data value. For example, a method is provided that implements domain quotas within a data storage system.

Abstract: A method, system, and computer usable program product for expanding memory size are provided in the illustrative embodiments. A desired size of an expanded memory and a first information about a workload in the data processing system are received. A size of a compressed memory pool to use with the memory to make the desired size of the expanded memory available is computed. A representation of the memory is configured, the representation of the memory appearing to be of a size larger than the size of the memory, the representation of the memory being the expanded memory, and the size of the representation being the size of the expanded memory. The expanded memory is made available such that the memory in the data processing system is usable by addressing the expanded memory.

Abstract: Systems and methods that manage memory are provided. In one embodiment, a system for communications may include, for example, a memory management system that may handle a first application employing a virtual address based tagged offset and a second application employing a zero based tagged offset with a common set of memory algorithms.

Abstract: A memory switching data processing system including one or more central processing units (‘CPUs’); random access memory organized in at least two banks of memory modules; one or more memory buses providing communications paths for data among the CPUs and the memory modules; and a flexibly configurable memory bus switch comprising a first configuration adapting the first CPU to a first bank of memory modules and a second CPU to a second bank of memory modules and a second configuration adapting the first CPU to both the first bank of memory modules and the second bank of memory modules.

Abstract: Provided is a method of dynamically reallocating a thread stack in a multi-threaded operating system, and more particularly, a method of dynamically allocating a thread stack of a multi-threaded operating system in an embedded system for wireless sensor nodes. The method includes the steps of: measuring sizes of data and non-data sections of a stack with respect to each thread; determining a new size of the non-data section of each stack based on the size of the data section of the stack measured with respect to each thread; and adjusting the size of the non-data section of each stack to the determined new size. According to the method, even without the source code analysis, an amount of memory spaces to be used can be reduced compared to that of a conventional static stack allocation method.

Abstract: The systems and methods partition digital data units in a content aware fashion without relying on any ancestry information, which enables one to find duplicate chunks in unrelated units of digital data even across millions of documents spread across thousands of computer systems.

Abstract: A method to determine the maximum number of VPNs assignable to plurality of routers in a VPN network. The first step in the method can be specifying a tolerance which is a probability that consumed router memory will exceed available router memory for each router in a plurality of routers. The second step can be computing the consumed router memory on each router in a plurality of routers by summing a route memory, an interface memory, a VPN memory, and a constant memory. The third step can be computing a number [V] of VPNs assigned to the router to insure that, with the specified probability tolerance, the consumed router memory will not exceed the available router memory for each router in a plurality of routers.

Abstract: A method for writing data to a disk drive. The method includes: receiving a write command; and, determining whether a beginning and an end of a rewrite area specified by the write command agree with boundaries of large-sized data sectors on a disk. The method also includes: reading head and tail data sectors and making a backup of the head and tail data sectors in first and second non-volatile memory areas, respectively, if the beginning of the rewrite area does not agree with the boundaries. The method includes starting a rewrite of the rewrite area after completing backups into first and second non-volatile memory areas. Moreover, the method includes: determining a state stage by using data in first, second, third and fourth non-volatile memory areas if a power shut-down occurs during execution of the write command; and, executing a recovery process in accordance with the determined state stage.

Abstract: A method for archival of messages in content addressable storage can be provided. The method can comprise identifying a plurality of messages for archival. The identified messages can be subjected to extraction of attachments therefrom. The messages, minus any removed attachments, can then be concatenated into a container file. Finally, the container file and the extracted attachments are stored in a content addressable storage system.

Abstract: A memory profiler is provided in a programming environment. The memory profiler records memory usage information at a point of a program that runs in the programming environment. The memory profiler may record information on the amount of allocated memory, the amount of freed memory and the amount of peak memory usage. The memory profiler may also record the number of allocations and frees. The memory usage information is associated with individual points in the program so that a user can utilize this information to change the program to use less memory. With the memory usage information, the present invention enables a user to recognize how much memory is being allocated and used on behalf of a program and to track down what code is actually causing a problem in the program.

Abstract: A semiconductor device includes a plurality of memories, a sequencer which outputs configuration information, and a memory reconfiguring circuit which reconfigures the memory area in accordance with the configuration information supplied from the sequencer. Since the memory reconfiguring circuit dynamically changes the allocation of the memories, it is possible to reconfigure the memory configuration and freely change the memory size in accordance with the purpose of use.

Abstract: A transmission device includes: a first interface unit to receive data of a plurality of first paths transmitted corresponding to a first data stream and outputting the data per path; a second interface unit to receive data of a plurality of second paths transmitted corresponding to the first data stream and outputting the data per path; a switch unit to input the data which has been output from the first and second interface unit and select and output the data from the first interface unit or the data from the second interface unit per path; a phase detection unit to detect and output a phase difference among the paths of the data which has been output from the switch unit per path; and a control unit to control the switch unit on the basis of the detected phase difference.

Abstract: Embodiments of the invention relate generally to incremental computing. Specifically, embodiments of the invention include systems and methods that provide for the concurrent processing of multiple, incremental changes to a data value while at the same time monitoring and/or enforcing threshold values for that data value. For example, a method is provided that implements domain quotas within a data storage system.

Abstract: The present invention provides an approach for SAN forecasting in a heterogeneous environment. Specifically, under the present invention capacity data on the heterogeneous environment is gathered. Capacity management techniques will then be used to analyze the SAN utilization, identify growth trends and patterns. Proactively, plans are made to account for these changes. Thereafter, a Capacity Planning Margin (CPM) will be applied to the forecast to reflect actual customer usage. The CPM adjusted forecasts will then be reviewed. Then, the SAN environment can be monitored by comparing actual vs. planned and return to adjust the forecast accordingly.

Abstract: A storage router and method for providing virtual local storage on remote storage devices to devices are provided. Devices are connected to a first transport medium, and a plurality of storage devices are connected to a second transport medium. In one embodiment, the storage router maintains a map to allocate storage space of the discovered storage devices to devices connected to the first transport medium by associating representations of the devices connected to the first transport medium with representations of the storage space and controls access from the devices connected to the first transport medium to the discovered storage devices in accordance with the map and using native low level block protocols.

Abstract: Method, apparatus and article of manufacture for determining memory requirements for a partition manager based on a given configuration. In one embodiment, a quantity of memory required for each of a plurality of components is determined, where each component is a collection of function-related code portions. Then, a total quantity of memory required for the partition manager based on the quantities of memory required for the plurality of components is determined.

Abstract: The present invention provides an approach for SAN forecasting in a heterogeneous environment. Specifically, under the present invention capacity data on the heterogeneous environment is gathered. Capacity management techniques will then be used to analyze the SAN utilization, identify growth trends and patterns. Proactively, plans are made to account for these changes. Thereafter, a Capacity Planning Margin (CPM) will be applied to the forecast to reflect actual customer usage. The CPM adjusted forecasts will then be reviewed. Then, the SAN environment can be monitored by comparing actual vs. planned and return to adjust the forecast accordingly.

Abstract: Methods, systems, and computer program products for providing memory management with constant defragmentation time are disclosed. According to one aspect, the subject matter described herein includes a method for memory management. The method includes dividing memory to be allocated into a plurality of pages of equal size P, wherein P is an integer. The method also includes designating each page for holding records of a respective predetermined record size, at least some of the respective predetermined record sizes being different from each other, wherein, when filled, each page holds records of its respective predetermined record size and wherein at least some of the pages hold a remainder record having a size based on the page size P and the space allocated for the maximum number of records of the page's respective predetermined record size that will fit within the page. The method also includes allocating memory so that each page is populated with records of its respective predetermined record size.

Abstract: A system is composed of multiple storage control modules, which are connected to each other via interconnects. The aforesaid interconnects connecting the storage control modules may cause certain extra latency. Each storage control module may have data preservation module, which can preserve data stored by host computers. The system incorporates a latency table and provides a volume according to the latency table in accordance with a request from a host computer or an administrator. The latency table is dynamically created or statically stored in the inventive system.

Abstract: Methods, apparatus, and systems for memories that include a data array and a configuration array adapted to store configuration information for configuring the data array, are disclosed. The data array and the configuration array include a plurality of wordlines and a plurality of bitlines. The plurality of wordlines in the data array extend in the same direction as the plurality of wordlines in the configuration array. Likewise, the plurality of bitlines in the data array extend in the same direction as the plurality of bitlines in the configuration array. The configuration array may include a wordline driver layout, a bitline driver layout, relative positions of zia contact regions, a diode sensing orientation, a sense amplifier layout, a voltage regulator layout, and a layout of conductors proximate to the array that are each substantially similar to corresponding elements of the data array. Numerous other aspects are disclosed.

Abstract: A software tool automatically places files and folders of a software program within segments of a DVD. The segments are defined by security placeholders, and the disposition of the placeholders is initially randomly determined, consistent with predefined rules. The placeholders are included on the disc to hinder unauthorized copying. A developer generally defines the order in which the files and folders are to be laid out, and the software tool automatically places the files and folders, filling successive segments and shifting the placeholders to accommodate files that will not fit in a current segment. However, any movement of the placeholders must be done by the tool and is only permitted if the new disposition of the placeholder is in accord with the predefined rules. A user can manually modify the automated layout, and in response, the files and folders are automatically shifted to accommodate the changes introduced by the user.

Abstract: Methods, systems, and computer-readable media are provided for managing memory within a system management mode (“SMM”). According to the method, a memory management program is executed within the SMM. The memory management program is operative to maintain a singly linked list having one or more descriptors for identifying allocated regions of system management random access memory (“SMRAM”). In particular, each descriptor identifies a region of SMRAM that has been allocated by the memory management program by storing an indication of the base memory address of the allocated region, an indication of the ending memory address for the allocated region, and a pointer to the next descriptor.

Abstract: A computer system or memory medium with instructions executable by a computer system to use a single allocator to coordinate volume transformations across virtualization layers. In one embodiment, the computer system creates a first storage object, wherein the first storage object is created to have a property. The computer system creates a second storage object out of the first storage object, wherein the second storage object depends on the property of the first storage object. The computer system then modifies the first storage object, wherein the modified first storage object maintains the property upon which the second storage object depends.

Abstract: A method for creating logical volume snapshots in a data storage system, including receiving a first write command to write first data to a partition of a logical volume, generating a first partition descriptor record (PDR), and storing the first data at a first physical location associated with the first PDR. A snapshot command is then received to form a snapshot of the logical volume, after which a second write command is received to write second data to the partition. In response to the second write command, a second PDR is generated and the second data is stored at a second physical location associated with the second PDR. A pointer between the first PDR and the second PDR is generated. In response to a read command indicating a number of a desired snapshot of the logical volume, the first PDR is accessed using the pointer.

Abstract: A data storage system includes methods and apparatus that provide volumes for access by host computing devices. The volumes can have a storage size that is independently configurable from an actual amount of data storage that may or may not be associated with the volume. The volumes also have a persistent identifier. The volumes can have any amount of associated storage space allocated to the volume, including none, within the data storage system. Since the storage size and associated storage space are each independently configurable from each other, host that interface with the data storage system can perceive the volumes as being larger than they really are. A dynamic volume configuration technique is provided which allows storage space within storage devices in the data storage system to be dynamically associated and disassociated (i.e., added and removed) from the volumes on an as-needed basis, without requiring disruption of host activities with respect to the volumes.

Abstract: A memory system is functionally designed so that, despite operation without an error correction device, memory chips of a memory module that are actually provided for error correction are concomitantly used for the data transfer. A control device is configured to receive, store and transfer data packets to and from a first and second set of memory chips. Transfer of an internal packet data from the control device to memory takes place such that a first record is stored in a second set of memory chips and additional records are stored in the first set of memory chips. In preferred embodiments, data is allocated in the second set of memory chips such that at least one additional transfer step takes place to the second set of memory chips compared with transfers to the first set of memory chips. In the additional transfer step(s), the first set of memory chips is masked from receiving data.