78results about How to "Improve cache utilization" patented technology

The invention discloses an SD-RAN (software defined radio access network)-based whole network cooperative caching management system and method. According to the SD-RAN (software defined radio access network)-based whole network cooperative caching management system and method, a content-popularity mapping table and a wait caching/replacement list are generated through detection and content popularity statistics, and a caching decision is made according to the wait caching/replacement list, and is issued to a caching node, so that caching and update can be carried out; a real-time global caching mapping table is obtained through monitoring the caching decision; and the caching node responds to a content request and delivers corresponding content according to the content request of a user of a current cell; characteristics of limitation of content acquisition delay and the change of the popularity of different content with time and places are fully considered, and a global network view in a control layer of a software defined network is fully utilized, and therefore, the detection range of the popularity of content can be expanded; and based on whole network cooperative caching optimized content arrangement, a situation that content is repeatedly called from a remote-end content server can be avoided, and network overhead can be reduced, and user experience can be improved.

The invention relates to a method and a device for increasing a retrieval speed in a database retrieval system and belongs to the technical field of database retrieval. The method comprises the following steps: establishing a data cache in an internal storage; after obtaining an index word, searching in the data cache; if a cache record of a corresponding index word is found in the data cache, generating and returning a retrieval result set according to the cache record and ending the retrieval at this time; if the cache record is not found in the data cache, retrieving the database and returning the retrieval result set; and if the retrieval result set is not empty, writing the index word and the retrieval result set into the data cache. The invention also discloses the device for increasing the retrieval speed in the database retrieval system. In the mode of caching after using, the device reduces the system resource consumed by establishing the cache and increases the use ratio of the cache. In the mode of caching the result set, the caching mechanism is more convenient and quick.

The embodiment of the invention discloses a message dispatching method and a device thereof and relates to the field of communication, the utilization rate of data cache can be raised, and resources are saved. The method comprises the following step: (1) the message dispatching device receives a message and stores the message into internal package cache, the message information is extracted and queue entering request information is generated, and the queue entering request information comprises a queue number and a message length; (2) the corresponding queue descriptor is read from a stored queue descriptor list according to the queue number; (3) whether a packet is lost or not is judged according to the queue descriptor, and if a judgment result is that the packet is lost, first queue entering request response information is generated according to the data length, the message length and the unit space size of a queue tail message descriptor in the queue message descriptor; (4) the message is written into an external memory according to the first queue entering response information, queue entering information is generated, and the message enters the queue according to the queue entering information. The message dispatching method and the device are used for the message dispatching.

The present invention provides a DRAM/NVM hierarchical heterogeneous memory system with software-hardware cooperative management schemes. In the system, NVM is used as large-capacity main memory, and DRAM is used as a cache to the NVM. Some reserved bits in the data structure of TLB and last-level page table are employed effectively to eliminate hardware costs in the conventional hardware-managed hierarchical memory architecture. The cache management in such a heterogeneous memory system is pushed to the software level. Moreover, the invention is able to reduce memory access latency in case of last-level cache misses. Considering that many applications have relatively poor data locality in big data application environments, the conventional demand-based data fetching policy for DRAM cache can aggravates cache pollution. In the present invention, an utility-based data fetching mechanism is adopted in the DRAM/NVM hierarchical memory system, and it determines whether data in the NVM should be cached in the DRAM according to current DRAM memory utilization and application memory access patterns. It improves the efficiency of the DRAM cache and bandwidth usage between the NVM main memory and the DRAM cache.

The invention discloses a processing method and a processing device for buffered data, wherein the processing method comprises the steps of inquiring whether the buffered data are stored in an objective memory; on the condition that a fact that buffered data are stored is inquired, reading a first time stamp which represents buffering time of the buffered data, wherein one piece of data corresponds with a first time stamp; determining whether the buffered data exceed preset time according to the first time stamp of the buffered data; and on the condition that a fact that the buffered data exceeds the preset time is determined, eliminating the buffered data. The processing method and the processing device settle a technical problem of incapability of timely eliminating the stale buffered data in prior art.

The invention provides a cache method, which includes the following steps: acquiring user downloading behavior data, and extracting URL address information and access time in the user downloading behavior data; performing statistics of URL address access times of the URL addresses accessed by users within a preset time based on the extracted URL address information and access time; selecting the URL addresses accessed by users the most frequently in the URL addresses accessed by users according to the statistical-based URL address access times as a hot issue list; downloading the content corresponding to the URL addresses in the hot issue list to a content cache server. Through the adoption of the method, the hot issue content can be confirmed by the great amount of downloading behaviors of users, and are cached only, so that unnecessary content storage is reduced, and the cache use ratio is improved.

A cache memory system including a primary cache and an overflow cache that are searched together using a search address. The overflow cache operates as an eviction array for the primary cache. The primary cache is addressed using bits of the search address, and the overflow cache is addressed by a hash index generated by a hash function applied to bits of the search address. The hash function operates to distribute victims evicted from the primary cache to different sets of the overflow cache to improve overall cache utilization. A hash generator may be included to perform the hash function. A hash table may be included to store hash indexes of valid entries in the primary cache. The cache memory system may be used to implement a translation lookaside buffer for a microprocessor.

The invention relates to a privacy protection method based on a content center. The method comprises a series of programs as follows: a requester uses an asymmetric public key puk_p of a content publisher to encrypt an original interest packet, the interest packet is processed as a Hash value H(I), a router returns a data packet after querying ID information of a related requester in a requester authorization table, the content publisher receives the interest packet encrypted by use of the asymmetric public key puk_p of himself, and uses a symmetric secret key K to encrypt the data packet, the privacy of each of the requester and the publisher is furthest protect; and furthermore, the decryption is unnecessary in the router when content publisher returns the data packet corresponding to the interest packet through the same route, the burdens of saving the secret key and computing by the router are relieved in the premise of protecting the privacy, the different authorization requesters with the same interest request can sufficiently use the cache data, the cache utilization rate is improved, and the requester access resource can be dynamically controlled.

The invention discloses an edge collaboration cache arrangement method based on a drosophila optimization algorithm. The method comprises the following steps: (1) obtaining a popular video set and a user demand vector of an area according to the historical request information of users in the area; (2) according to the popular video set and the user demand vector, establishing a target optimizationproblem with the maximization of a total video transmission delay reduction amount in the area as the target, and solving the target optimization problem based on the drosophila optimization algorithm to generate a cache arrangement decision; (3) allocating a video cache task for each cache node according to the cache arrangement decision; and (4) when a user request arrives on the cache node, ifthe cache node does not cache corresponding contents, downloading the contents from a neighbor cache node that caches the contents and has the minimal delay, and if all cache nodes in the area have no cache response contents, downloading the cache response contents from a remote server. By adoption of the edge collaboration cache arrangement method disclosed by the invention, the cache hit rate can be improved, the average video transmission delay is reduced, and the user experience quality is improved.

The invention provides a read-write solution for tens of millions of small file data. According to the solution, the mode of creating large-block continuous disk space is used for storing a large number of small files when the small files are stored, namely, logically continuous data are stored on the continuous space of a disk array as far as possible; the disk space is divided into a plurality of blocks, and the size of each block is 64 KB. According to the basic thought, each small file can only be stored in the single block and cannot be stored by crossing two blocks, each folder can be provided with one or more blocks, the blocks are only used for storing the data of the corresponding folder, and each piece of file data is stored on the continuous disk space. Compared with the prior art, the logically continuous data are stored on the continuous space of each physical disk as far as possible, the cache technology is used for playing the role of a metadata server, the cache utilization rate is improved through simplified file information nodes, and thus the access performance of the small files is improved.

A DNS (Domain Name System) load balancing adjusting method includes the following steps: step S1000, a load balancing subsystem receives a request, and a server is confirmed to be responded in a server cluster subsystem; step S2000, a response server of the server cluster subsystem analyzes the request; step S3000, the analysis result is sent by the response server of the server cluster subsystem. The method and the system can improve the scheduling balancing capability of a DNS system.

The invention relates to an Apache Solr read-write separation method and apparatus, a computer device and a storage medium. The method comprises the steps of receiving a data writing request of a persistence program, and writing data into a writing cluster and a snapshot cluster; receiving a searching request of an Apache Solr client, and search for the data from a reading cluster and the snapshotcluster; receiving a segment merging instruction sent by the persistence program, and executing segment merging operation on the data in the writing cluster; receiving a synchronization instruction sent by the persistence program, and incrementally loading an index file from a data directory of the writing cluster to an out-of-heap memory of the reading cluster; and receiving a data cleaning instruction sent by the persistence program, and cleaning out the synchronized expired data in the snapshot cluster. By the adoption of the method, the read operation and the write operation can be separated, so that the situation that the system resources are competed is avoided, and the normal operation of a server is guaranteed; and the segment merging operation is completed before data synchronization, so that system crash caused by segment merging during synchronization is avoided.

The invention provides a caching clearing method and device. The method comprises the following steps: when a browser starts loading or loading continuously runs for a first preset time, the browser clears caching records in a caching database, and provides information of caching files corresponding to the cleared caching records for a background thread; and the background thread deletes the caching files corresponding to the caching records according to the information of the cleared caching files. Through adoption of the caching clearing method and device provided by the invention, the caching utilization ratio can be increased, and a user's storage space can be saved; and the cache is cleared through an improved caching file deletion algorithm, so that the CPU occupancy time can be shortened, the standstill phenomenon when a user browses a webpage can be avoided, and the user's web experience is improved.

The embodiment of the invention discloses a method and equipment for network duplicate removal. The method comprises the following steps: receiving grouping from an incoming interface; acquiring an outcoming interface according to a destination address of the grouping; carrying out duplicate removal on the grouping according to the outcoming interface; and switching the grouping after duplicate removal from the incoming interface to the outcoming interface. By adopting the technical scheme provided by the embodiment of the invention, the problems that flow duplicate removal of interior of network equipment and an interface line card can not be realized in the prior art, and the cache utilization rate of the network equipment is low are solved.

A method of accessing cache memory for parallel processing processors includes providing a processor and a lower level memory unit. The processor utilizes multiple instruction processing members and multiple sub-cache memories corresponding to the instruction processing members. Next step is using a first instruction processing member to access a first sub-cache memory. The first instruction processing member will access the rest sub-cache memories when the first instruction processing member does not access the desired data successfully in the first instruction processing member. The first instruction processing member will access the lower level memory unit until the desired data have been accessed, when the first instruction processing member does not access the desired data successfully in the sub-memories. Then, the instruction processing member returns a result.