1498 results about "Access frequency" patented technology

A file server provides transaction processing capabilities previously supplied by the operating system of a host computer. On-disk file system metadata is changed only at commit time, and a transaction log protects the transition. The disk state can only be a consistent state, resulting from a commit operation. All disk-block reservation and pre-allocation mapping are in the memory, and after a crash, they are automatically discarded. The file server therefore relieves the client of processing burden and also reduces network traffic. In addition, the file server can more efficiently perform the transaction processing capabilities and reduce the frequency of access to storage by judicious allocation of file system blocks and transfer of file system blocks between file system objects, cache memory, and the transaction log. The differentiation between preallocation states and allocation states of in-memory file system blocks also permits application programs to more efficiently transfer data between files.

A secure pickup and delivery container includes a lockable door, a control unit, an access element, and an anchoring element, according to one embodiment. The control unit includes a processing element and a memory that can be programmed either on-site or remotely with access privilege information such as identity (e.g. of container, delivery person, etc.), location, date, time, frequency of access, and/or package-specific information. In one embodiment, access privilege information is programmed when an intended recipient of a delivery consummates a point of sale transaction, for example over the Internet or telephone. The access element can be a keypad, a biometric scanner, a card reader, a bar-code reader, and/or a wireless control element to read a programmable token such as a smart card. Delivery personnel can enter access request information into the access element, and if it favorably compares with the access privilege information, the control unit unlocks the door. Notification can be concurrently made via wireline or wireless communications to the intended recipient, who may be situated remote from the secure container. The recipient can optionally return a delivery acknowledgment to the delivery personnel. Details of the delivery transaction can also be recorded electronically on the delivery personnel's token, within the container, or at a remote location.

Spread spectrum packet-switching radio devices (22) are operated in two or more ad-hoc networks or pico-networks (19, 20, 21) that share frequency-hopping channel and time slots that may collide. The frequency hopping sequences (54) of two or more masters (25) are exchanged using identity codes, permitting the devices to anticipate collision time slots (52). Priorities are assigned to the simultaneously operating piconets (19, 20, 21) during collision slots (52), e.g., as a function of their message queue size or latency, or other factors. Lower priority devices may abstain from transmitting during predicted collision slots (52), and/or a higher priority device may employ enhanced transmission resources during those slots, such as higher error correction levels, or various combinations of abstinence and error correction may be applied. Collisions are avoided or the higher priority piconet (19, 20, 21) is made likely to prevail in a collision.

In a memory system with a file storage system, an optimal file handling scheme is adaptively selected from a group thereof based on the attributes of the file being handled. The file attributes may be obtained from a host or derived from a history of the file had with the memory system. In one embodiment, a scheme for allocating memory locations for a write operation is dependent on an estimated size of the file to be written. In another embodiment, a scheme for allocating memory locations for a relocation operation, such as for garbage collection or data compaction, is dependent on an estimated access frequency of the file in question. In this way, the optimal handling scheme can be used for the particular file at any time.

In a memory system with a file storage system, an optimal file handling scheme is adaptively selected from a group thereof based on the attributes of the file being handled. The file attributes may be obtained from a host or derived from a history of the file had with the memory system. In one embodiment, a scheme for allocating memory locations for a write operation is dependent on an estimated size of the file to be written. In another embodiment, a scheme for allocating memory locations for a relocation operation, such as for garbage collection or data compaction, is dependent on an estimated access frequency of the file in question. In this way, the optimal handling scheme can be used for the particular file at any time.

The invention relates to an abnormal access behavior detection method on the basis of WEB logs. The abnormal access behavior detection method includes steps of 1) performing IP(internet protocol) access statistics and URL access statistics after removing interference information by analyzing WEB raw logs so as to acquire an IP access statistic list and a URL access statistic list, 2) according to the IP access statistic list, performing crawler behavior characteristic recognition, error response code statistics and access frequency deviation degree detection while updating IP abnormal characteristic list, and 3) sequencing the abnormal characteristics in the IP abnormal characteristic list according to a set order of precedence, and outputting the sequenced IP abnormal characteristic list to obtain abnormal access results. By the abnormal access behavior detection method, an access model is built with no depending on history access data, abnormal access is checked by lateral comparison, and abnormal parameter detection is performed by voting and referring query strings.

A wireless device and a communication method, which enable a position of the wireless device to be known and enable a frequency which does not interfere with that of another wireless station to be selected, are provided. A wireless device belonging to a second wireless system in which a frequency band to be used overlaps with that of a first wireless system, and a priority with which the overlapping frequency band is used is lower than that of the first wireless system, the wireless device includes: a location receiving unit receiving location information formed of a place name and indicating a location of the wireless device; a geographic coordinate acquiring unit acquiring, based on the location information, geographic coordinates including latitude and longitude corresponding to the location information; and a frequency setting unit accessing a frequency server in which a frequency assigned to a wireless device belonging to the first wireless system and geographic coordinates including latitude and longitude related to a position of the wireless device are stored by being corresponded to each other, by using the geographic coordinates acquired by the geographic coordinate acquiring unit, and acquiring at least one of a frequency that is not assigned to the wireless device belonging to the first wireless system and a frequency which is not at risk of interfering with that of the wireless device, to set the frequency as a transmission/reception frequency.

A system and method for performing policy-based storage management using data related to access frequency and file attribute accumulation. A switch device provides transparency for transactions between a client and a storage network. The transparency allows objects (e.g., files or directories) to be moved (e.g., migrated) on the storage network without affecting a reference to the object used by the client (e.g., a file handle). A monitoring module generates accumulation data associated with the transactions for use in policy-based management. The accumulation data can describe uses of the file such as how often certain files are accessed, modifications to files such as creations of new directories or files, and other uses.

A storage apparatus providing a logical storage area for storing data to an external apparatus, includes a plurality of storage devices each providing a physical storage area for storing the data, the storage devices being different from each other in device property including data input/output performance, a capacity virtualization part managing the physical storage areas of the storage devices as unit physical storage areas each having a predetermined storage capacity and managing the unit physical storage areas in association with a plurality of unit logical storage areas forming the logical storage area, a tier controller managing the plurality of unit physical storage areas by classifying into a plurality of tiers the unit physical storage areas provided by the storage devices having the different device properties, and a redundant data management part managing redundant unit storage areas which are a plurality of the unit physical storage areas storing the same data. The data migration between the tiers is controlled according to, for example, an access frequency to the data from the external apparatus.

The invention discloses a fusion memory system of a nonvolatile memory and a dynamic random access memory. The nonvolatile memory and the dynamic random access memory are fused together and are jointly used as a memory of a computer system for unified management, the dynamic random access memory can carry out unified addressing together with the nonvolatile memory, part capacity of the dynamic random access memory can be used as a high-speed cache of the nonvolatile memory, the capacity of cache space adapts to data load characteristics by itself and is dynamically matched, so that the access speed of the nonvolatile memory is improved, access frequency of a disk by an I/O can be lowered, and the overall performance of the computer system is improved.

A method, system, and computer program product for file relocation on a data storage device are provided. The method includes initiating file relocation in response to invoking a cleaner function for a data storage device. The method also includes examining metadata associated with a file on the data storage device to determine an access frequency of the file, and classifying the file as a function of the access frequency. The method further includes relocating the file to a fast region of the data storage device when the file is classified as frequently accessed, and relocating the file to a slow region of the data storage device when the file is classified as infrequently accessed.

A solid state disk (SSD) caches disk-based volumes in a heterogeneous storage system, improving the overall storage-system performance. The hottest data blocks are identified based on two factors: the frequency of access, and temporal locality. Temporal locality is computed using a logarithmic system time. IO latency is reduced by migrating these hottest data blocks from hard-disk-based volumes to the solid-state flash-memory disks. Some dedicated mapping metadata and a novel top-K B-tree structure are used to index the blocks. Data blocks are ranked by awarding a higher current value for recent accesses, but also by the frequency of accesses. A non-trivial value for accesses in the past is retained by accumulating the two factors over many time spans expressed as a logarithmic system time. Having two factors, access frequency and the logarithmic system time, provides for a more balanced caching system.

Methods for optimizing data access in a row-oriented relational database containing data sets having attributes using a computer are presented the method including: causing a computer to analyze a database workload to determine an access frequency for each of the attributes; causing the computer to assign each of the attributes to a priority classes corresponding with the access frequency, where the priority classes include a higher priority class and a lower priority class, and where a higher priority class corresponds with a higher access frequency and a lower priority class corresponds with a lower access frequency; causing the computer to store the attributes in accordance with the classes, where the attributes assigned to the higher priority class are stored in a high priority storage medium, and where the attributes assigned to a lower priority class are stored in a low priority storage medium.

The invention discloses a mixed cloud storage method based on file access frequency. The mixed cloud storage method based on the file access frequency includes the following steps: adopting a multi-copy mode storage strategy for a new file when the new file is uploaded to a file system; adopting an erasure code coding mode storage strategy for the file after the file is completely uploaded to the file system; periodically counting access frequency of each file in the file system, and dividing files into three categories which are respectively high frequency files, medium frequency files and low frequency files; adopting different storage strategies for different types of data and different types of files in the system; and dynamically adjusting the storage strategies of the files according to changes of the access frequency of the files in the system. The mixed cloud storage method based on the file access frequency classifies the files by periodically counting the access frequency of each file in the file system, adopts different storage strategies for different types of files, and adjusts the storage strategies of the files according to the changes of the access frequency of the files, and therefore the whole file system wholly improves system storage resource utilization rate on the premises of guaranteeing data reliability and access speed.

The invention relates to a management method of a multifile copy of a distributed file system. A copy management mechanism based on a frequency is adopted, the state of a file copy is changed according to the read-write access frequency of the file and the information trend of an access resource, and the position transference is increased/reduced and stored through the trend of the quantity of the file copy. The management method includes copy grading management, copy creating policy, copy selection and orientation, and a copy consistency maintenance method. The creating method of the file copy includes the creating initiated by the user and the creating initiated by a crunodes, and adopts a data gridding method and a policy based on the benefit drive. The orientation of the copy maps a logic file on an appropriate copy, and a copy with minimum cost and highest access efficiency is selected to be provided to the user for using. The invention has the advantages that the provided service carries on the excellent characteristics of the distributed file system, which includes loose coupling, high usability, high reliability and high cost performance.

A system for computer system security using file system access pattern heuristics is provided. The system includes access patterns to establish nominal read and write frequencies to a file system using heuristics, dynamic policies, and a policy manager. The policy manager monitors accesses to the file system to determine read and write access frequencies to the file system. The policy manager also compares the read and write access frequencies to the access patterns, and determines whether the read and write access frequencies exceed the access patterns per the dynamic policies. The policy manager further identifies an attack on the file system in response to exceeding the dynamic policies, where the identified attack is associated with a communication path to the file system. The policy manager additionally modifies an aspect of access via the communication path in accordance with the attack response in the dynamic policies to mitigate the attack.

A TLB provided in a memory management apparatus stores an entry for each logical page, and each entry holds an address of a physical page mapped to a corresponding logical page, an index showing the degradation degree of the physical page, and an index showing the access frequency to the logical page. The memory management apparatus accesses a physical page mapped to a desired logical page according to the data stored in the TLB, periodically exchanges the contents between a first physical page mapped to a specific logical page having a largest access frequency index and a second physical page having a smallest degradation index, and then maps the specific logical page to the second physical page. Through the physical page exchange and corresponding mapping process, accesses to each physical page are distributed, so that degradation in storage function is substantially equalized.

The invention provides a convolution operation chip and communication equipment. The convolution operation chip comprises an M*N multiplier accumulator array, a data cache module and an output control module; the M*N multiplier accumulator array comprises a first multiplier accumulator window, and a processing unit PE<X, Y> of the first multiplier accumulator window is used for conducting multiplication operation on convolution data of the PE<X, Y> and convolution parameters of the PE<X, Y> and transmitting the convolution parameters of the PE<X, Y> to PE<X, Y+1> and transmitting the convolution data of the PE<X, Y> to PE<X-1, Y+1> to serve as multipliers of multiplication operation between the PE<X, Y+1> and the PE<X-1, Y+1>; the data cache module is used for transmitting the convolution data and the convolution parameters to the first multiplier accumulator window; the output control module is used for outputting a convolution result. According to the convolution operation chip and the communication equipment, the RAM access frequency can be decreased and the RAM access stress can be relieved while the array resource utilization rate is increased.

The invention is applied to the technical field of flash memory storage, and provides a flash memory and a method and a system for automatically separating cold and hot data based on the same. The method comprises the steps that a hot degree identifier for showing the access frequency of data is added for each record in a logic physical address mapping table of the flash memory; and when the flash memory processes data, the hot degree identifiers in the logic physical address mapping table are updated according to the preset hot levels, and different hot levels correspond to different hot degree identifiers. According to the flash memory and the method and the system for automatically separating cold and hot data based on the same, the cold and hot degrees of data are processed directly in the logic physical address mapping table of the flash memory, and just modifying an FTL (Flash Translation Layer) algorithm can separate cold and hot data without using additional software and cache. Therefore, the flash memory and the method and the system for automatically separating cold and hot data can automatically realize the separation and storage according to the access frequency during the storage of data in the flash memory instead of using additional cold and hot data judgment algorithm and cache.