75 results about "File system fragmentation" patented technology

A system and method for hybrid virtual machine monitor system is provided. A first operating system uses a file system to manage data storage and retrieval within a data storage area. A second operating system, which is not compatible with the first operating system's file system, executes a management application backup utility. The first operating system includes a filter driver that sends logical block addresses, which correspond to data reads / writes, to the management application backup utility. In turn, the management application backup utility uses the logical block addresses to perform operations on the data storage locations. In one embodiment, the management application backup utility performs actions on the data storage area, such as a disk defragmentation, and subsequently sends data location changes to the filter driver. In this embodiment, the filter driver instructs the first operating system's file system to update its translation tables based upon the data location changes.

A defragmentation technique determines the extent to which data blocks of a file are fragmented on disks of a computer and, in response, efficiently relocates those blocks if such relocation improves the on-disk layout of the file. Each indirect block of the file is examined and the current layout of the range of pointers referencing the data blocks is determined. In addition, the number of operations needed to retrieve those data blocks from disks is calculated. A potential new layout is then estimated based on an average fullness of the file system. If the potential new layout improves the fragmentation of the current layout, then the data blocks for that range are relocated, if there is sufficient free space on disk. Otherwise, the blocks are not relocated and the current on-disk layout of the file is maintained.

The embodiment of the invention provides a disk defragmentation method, a disk defragmentation device and a host. The method comprises the following steps: judging the fragmentation degree of a first disk area according to a first space management object; if determining that the fragmentation degree of the first disk area reaches the preset fragmentation degree, writing a data block of each object corresponding to a defragmentation sub-area into a continuous disk space according to the first space management object, and writing metadata, which is generated when the data block of each object is written in the continuous disk space, in the continuous space, wherein the defragmentation sub-area is smaller or equal to the first disk area; and releasing the defragmentation sub-area. Visibly, a section of continuous idle space in the first disk area can be obtained after the defragmentation sub-area is subjected to disk defragmentation according to space management information; and thus, the disk defragmentation efficiency is increased.

The invention discloses a video recording file management method and device for easily preventing disk fragments from being generated. The method comprises the following steps that firstly, disk formatting is conducted on a video recorder, a disk is fixedly set to one subarea or multiple subareas, and different formatting methods provided by an operating system are applied to different file systems; secondly, a video recording file index database is established, and the video recording file retrieval service is provided; thirdly, the size of each video recording file is fixed and marked as A (Byte); fourthly, when the disk is not fully occupied, a general file establishment and write-in method is applied; fifthly, when the disk is fully occupied, the file which is established earliest on the disk is found out and used as a new video recording file, write-in is conducted from the start position of the file in a covering mode, and the step is repeated. The video recording file management method and device for easily preventing disk fragments from being generated have the advantages of being simple, easy to achieve and compatible with different file systems due to the fact that the management method and device capable of easily preventing the disk fragments from generating the video recording file are established on a general file system; the problems that after audio and video data are written in a hard disk recorder in a circulating mode for a long time, a great number of disk fragments are generated and the system operating efficiency is influenced are solved.

The invention provides a method and a device for optimizing the disk space utilization ratio in digital television time shifting. During recording of time shifting programs, if the duration of the time shifting program recorded currently exceeds the set maximum time shifting time, and if the stream bit rate of a transport stream received currently is lower than the average stream bit rate, time shifting programs of which the recording time is longest are deleted to release redundant disk fragmentation, and the newly-recorded time shifting program covers time shifting programs of which the recording time is longest in current files. By the aid of the method and the device, the size of the disk space occupied by time shifting programs can be changed dynamically according to the requirements, so that the problem of the low disk space utilization ratio when the disk space is not sufficient can be solved.

The invention discloses an on-line fault tolerance method in a cluster data processing system. The method comprises the following steps that firstly, a last level processing node stores a processing result in a file fragmentation mode; secondly, a next level processing node reads a file fragmentation to continue to carry out processing; thirdly, a database is used for recording file fragmentation marks processed on all nodes; fourthly, when the node fault is detected, a new node is started to replace the fault node to work; fifthly, the new node reads the file fragmentation on the fault node from the database, and the fault field is recovered. The fault tolerance in the data processing process is achieved.

Disclosed is a method for preparing a disk drive of a computing system for test, including the steps of recording a plurality of test files to a partition of the disk drive until a free space of the partition is less than a predetermined value; and thereafter deleting a portion of the plurality of test files from the partition. A computer program product including a computer readable medium carrying a program for preparing a disk drive of a computing system for test, the computer program product having code for recording a plurality of test files to a partition of the disk drive until a free space of the partition is less than a predetermined value; and code for deleting a portion of the plurality of test files from the partition.

The invention provides a processing method of tile images. The processing method comprises the steps of obtaining the number of co-occurrence times of the first tile image and the second tile image according to historical request data and the first tile image; according to the number of co-occurrence times and a preset co-occurrence threshold value, combining the first tile image and the second tile image so as to obtain the third tile image; storing the third tile image; storing the first corresponding relation between the first tile image and the third tile image and the second corresponding relation between the second tile image and the third tile image. The invention further provides a processing system of the tile images. According to the processing method and system of the tile images, the disk fragmentization degree of a disk storing the tile images is lowered.

The present invention discloses a multi-path audio / video stream storage method for preventing disk fragments from formation. The multi-path audio / video stream storage method comprises the following main steps of: (1) establishing data files for storing audio / video streams; (2) distributing data files stored by the plurality of the audio / video streams, namely respectively setting a storage space needed by each path of the audio / video stream, automatically distributing the data files with the corresponding quantity according to the storage space needed by each path of the audio / video stream, and respectively establishing a data file index database table corresponding to each path of the audio / video stream and inserting the data file index database table into a record of the data file distributed by the data file index database table; and (3) storing the plurality of paths of audio / video streams, namely independently storing each path of audio / video stream by combining a database and updating a database record corresponding to the audio / video stream according to the requirements. The multi-path audio / video stream storage method for preventing the disk fragments from formation has the advantages that the disk fragments are not formed; the storage efficiency of the audio / video streams is not reduced along the increasing of time, and total recording time of each path of audio / video stream is accurately controlled; and a disk space occupied by the data file of each path of audio / video stream is continuous so that the accessing efficiency of the audio / video stream files is improved.

The invention provides image file management method and system, relating to the image storage technology and aiming at solving the defects of obtaining and displaying images slowly and easily generating disk fragments after an image is deleted in the prior art. The image file managing method comprises the storage steps of: receiving an image storage request, extracting attribute information of an image, finding useable storage positions in a corresponding storage region in a managing file and corresponding compression modes according to the image resolution; and compressing the image to the size corresponding to the compression mode according to the compression mode, then storing the compressed image to the useable storage position, generating a storage record according to the attribute information and the like, and adding into the managing file. Image data is classified and stored according to the resolution. Therefore, the speed of acquiring and displaying the image can be improved, and the disk fragments generated in the deletion are reduced. In addition, various kinds of attribute information of the image data are recorded by the image managing file to strengthen the management of the image data.