47 results about "I/O scheduling" patented technology

The invention provides a method for dispatching I/O of an asymmetry virtual machine based on multi-core dynamic partitioning, which comprises the following steps: when a system is started, firstly an I/O dispatching initialization module completes the configuration of dispatching parameters and the allocation of a buffer zone; subsequently, when the system runs, an I/O status monitoring and information processing module dynamically collects and processes the runtime parameters of driving Domain and customer Domain, carries out statistics on parameters such as types, time and frequency of happened I/O event, and then sends the statistics result to a dispatching decision module for judgment; and the dispatching decision module makes dispatching decision according to preset conditions, and gives out commands to a multi-core dynamic partitioning module to execute the operation of multi-core dynamic partitioning or recovering, thus changing the core partitioning mode and dispatching status of a processor of the system and leading the using mode of processor resources and the dispatching switching strategy of Domain to better adapt to I/O load requirements of the current system, and achieving the purpose of optimizing I/O performance.

It's an object-based storage device load balancing method, belonging to the computer storage technology, aiming at balancing the distribution of the system load in the storage nodes by reasonable scheduling of I / O load and hot data migration, to take full advantage of high-performance of storage device nodes. The order of the invention includes: (a) active load detection steps; (2) equipment load statistics steps; (3) object migration and copies management steps; (4) object properties expansion steps; (5) I / O request processing steps. The invention expands the SCSI protocol standards of object storage devices (OSD). With the advantages of object storage model, it provides basis for I/O scheduling decision, makes full use of the computing capacity of all the storage nodes to balance the load, reduce storage system response time and increase the storage system throughput.

The invention discloses a multithreading-based MapReduce execution system comprising a MapReduce execution engine implementing multithreading. A multi-process execution mode of Map/Reduce tasks in original Hadoop is changed into a multithread mode; details about memory usage are extracted from Map tasks and Reduce tasks, a MapReduce process is divided into multiple phases under fine granularity according to the details, and a shuffle process in the original Hadoop is changed from Reduce pull into Map active push; a uniform memory management module and an I/O management module are implemented in the MapReduce multithreading execution engine and used to centrally manage memory usage of each task thread; a global memory scheduling and I/O scheduling algorithm is designed and used to dynamically schedule system resources during the execution process. The system multithreading-based MapReduce execution system has the advantages that memory usage can be maximized by users without modifying the original MapReduce program, disk bandwidth is fully utilized, and the long-last I/O bottleneck problem in the original Hadoop is solved.

The invention provides a multi-core multi-model parallel distributed type real-time simulation system which comprises a main control module, a model module, a data channel control module and a hardware interface module, wherein the main control module is used for accomplishing corresponding functions by scheduling different simulation scheduling algorithms, transmitting instructions for accomplishing data mapping in accordance with simulation setup to the data channel control module according to hardware I/O (Input/Output) scheduling polices in each simulation period, transmitting instructions for accomplishing the IO data read-out and write-in within one period to the hardware interface module, and transmitting instructions for stimulating the operation to the model module; the model module is used for acquiring input data once, solving once and output data once in each simulation period according to the instructions; the data channel control module is used for accomplishing data mapping and relevant program processing of the I/O of a model or hardware in each period according to the instructions; and the hardware interface module is used for carrying out configuration read-out and output on input/output streams of hardware I/O equipment according to a data configuration format of a file, and accomplishing the operation of read-out or write-in to various hardware I/O equipment.

The invention provides a self-adaptive I/O (Input / Output) scheduling method of a multi-control storage system. The self-adaptive I/O scheduling method of the multi-control storage system has the advantages of being capable of achieving load balance of a multiple controller architecture and among controllers; avoiding risk and performance choke points caused by single controller failure; supporting a plurality of host connecting interfaces; supporting an ISCSI (Internet Small Computer System Interface), an FC (Fibre Channel), an InfiniBand and 10 gigabit network connection; being capable of providing high bandwidth IB (InfiniBand) and the 10 gigabit network connection for users at the same time; and meeting the differentiation requirements of customers for high bandwidth and high performance. The invention relates to I/O scheduling of the multi-control storage system and provides the I/O scheduling method among multiple controllers. When the multi-control storage system accepts an I/O request from an application layer, the self-adaptive I/O scheduling method of the multi-control storage system can be utilized to schedule the I/O request to the multiple controllers to perform simultaneous concurrent execution, not only allocates unallocated I/O requests to low load controllers, but also reschedules I/O requests to lower load controllers from overload controllers, so that the load state of every controller in a system is improved, I/O load scheduling and balance on multi-control nodes are achieved, potentials of equipment are fully scheduled, and the performance of the system is improved.

The invention provides a magnetic disk I/O dispatcher for server virtual environment and dispatching method thereof. The block I/O resource is proportionally allocated to each virtual system in the server virtual environment and the allocated I/O resource in the virtual system is rigorously isolated, therefore the performance of the virtual system is ensured and the effective utilization of the limited resource is provided. The magnetic disk I/O dispatcher comprises: a plurality of queues for I/O request, an I/O request increasing unit and an I/O request extracting unit. The I/O request increasing unit increases the I/O request of each system to the corresponding queue. The I/O request extracting unit extracts the I/O request from the queen.

The invention discloses a virtual I/O scheduling method and system. The method includes the steps that when an upper-level application generates an I/O request Rk for a file system, a CFD captures the request Rk through a filter driver of the file system, classifies the request according to a file Fk, a process Pk and a timestamp Tk, adds a class label Ck into the request Rk and inserts the I/O request into an I/O queue of the corresponding class according to the added class label Ck; data blocks needed by the I/O request are searched for in a local cache, and if the data blocks are found, the process returns. By means of the virtual I/O scheduling method and system, low overhead and little modification on an operating system are achieved, and the problem that in a cloud calculation environment, numerous confusing types of I/Os generated by terminal equipment lead to poor system performance is solved.

The invention provides a RAID-6 I/O scheduling method for balancing strip writing. The method comprises: reorganizing write requests by analyzing input/output distribution of the requests; minimizing the number of modifications of corresponding check by means of check sharing; merging input/output fragments and a write request in an incoming same strip into a new write request; writing the new write request to a disk once; marking an illegal data block generated in a reorganization process; recording the illegal data block in a memory; performing trash recycling on the illegal data block; and storing metadata information of the illegal data block for redistribution preparation. A write operation can be reduced, and disk load in a RAID storage system is balanced. Basic ideas of the invention is to perform strip writing on the basis that the corresponding check is globally understood, and to reduce the number of check modifications required for strip writing by reorganizing distribution of data blocks.

Embodiments of the invention disclose an optimization method and device for I/O scheduling, a storage medium and an intelligent terminal. The method comprises: detecting a disk I/O request sent by a target application program; judging whether the disk I/O request is a request generated by the target application program under an interaction scene or not; and adding the disk I/O request to one of atleast two preset I/O scheduling queues according to a judgment result, and processing the disk I/O request in the at least two preset I/O scheduling queues according to a preset processing strategy.By adopting the technical scheme, the problem that the disk I/O request cannot be responded in time in an interactive scene can be avoided, and the problem of terminal jamming in the interactive sceneis improved.

An I/O scheduler having reduced application delay is provided for an electronic device having storage media and running at least one application. Each application interfaces with the storage media through an I/O path. Each application issues I/O requests requiring access to the storage media. The I/O requests include reads from the storage media and writes to the storage media. The I/O requests are ordered in the I/O path such that the reads are assigned a higher priority than the writes. The I/O requests are dispatched from the I/O path to the storage media in accordance with ordering step such that the reads are dispatched before the writes. The scheduler's dispatch can also apply concurrency parameters for the electronic device.

The invention discloses a method for separately processing data reading and writing requests and metadata reading and writing requests. The method comprises the following steps: adding metadata semantics of requests; setting a data request queue and a metadata request queue for each SCSI (small computer system interface) equipment, wherein the metadata request queue is especially used for processing metadata requests, and different processing modes are adopted for different requests. The metadata request queue adopts a priority response processing mode according to the characteristics that the metadata requests are small in particle size, high in instantaneity and disperse in distribution; the requests do not pass through an I/O (input/output) scheduling layer, are not delayed in the request queue, and are directly issued to a disk driver; the data requests which are large in request particle size, relatively low in frequentness, and centralized in distribution adopt the mode that the requests pass through the I/O scheduling layer, are stored in the request queue for a period of time, and are issued to the disk driver after being discharged, so that the bottleneck problem of a single request queue is overcome; the parallelism of different levels of request processing is strengthened; the method is especially suitable for the business which needs to frequently and greatly store small files, and has high demands on critical data instantaneity.

A method and system for load balancing. The method includes determining that connectivity between a first host and a primary array controller of a storage system has failed. The first host is configured to send input/output messages (I/Os) to a storage system through a storage network fabric. An available host is discovered at a multi-pathing driver of the first host. The available host is capable of delivering I/Os to the primary array controller. An I/O is redirected from said first host to the available host over a secondary communication network for delivery to the storage system.

The invention discloses an optimization method of the I/O (input/output) performance of a virtual machine. According to the method, on one hand, the clock interruption frequency of the virtual machine is reduced by combining continuous I/O instructions in a client operation system, so that the environment switching expense is reduced; on the other hand, redundant operations in the client operation system are eliminated and include invalid I/O dispatching of redundant function in a virtualized environment and support of virtual network card drive on an NAPI (new application programming interface), so that necessary operations are performed by the virtual machine, and the system performance is improved.

A method, computer program product, and computing system for associating a first I/O scheduling queue with a first process accessing a storage network. The first I/O scheduling queue is configured to receive a plurality of first process I/O requests. A second I/O scheduling queue is associated with a second process accessing the storage network. The second I/O scheduling queue is configured to receive a plurality of second process I/O requests.

A time label based I/O scheduling QoS method System Design Based on Time Label is provided. In the form of a two-level mapping queue, where the first level is the client queue for the client, the second level is a real request queue, each request contains three time stamps (Ri, Wi, Li), where i denotes the client number to which it belongs, and a large amount of dynamic data is organized and managed by constructing reserved time stamps, weighted time stamps and full binary trees of upper bound time stamps respectively. The I/O scheduling QoS method based on the time label designed by the invention can more reasonably allocate the limited I/O resources according to requirements, so as to cope with the flexible and changeable application scenarios and ensure the reliability of the system performance.