84results about How to "Reduce backup time" patented technology

The invention relates to a method for deleting duplicated data in a file system in real time, and belongs to the technical field of computer data storage. In a file system establishment stage, a file metadata table, a data block index and a file constitution table are set in an embedded database; and in a file system operation stage, operating commands initiated to the file system by applications are received and responded through a file system driver, and include establishing a new file, writing data to an existing file, reading data from the existing file and deleting the existing data. The method simultaneously supports fixed-length and variable-length file blocking methods, and can delete the duplicated data in the file system in real time, save storage space and improve the utilization efficiency of storage equipment; and the process of deleting the duplicated data is completely transparent to the applications and a user, the file operation of various conventional applications is seamlessly compatible, and almost all negative effects on the user experience are avoided.

The invention provides a mirror image snapshooting based on virtual machine backup system which is used for backing up virtual machine information in a virtual platform. The backup system comprises a backup server, a virtual management module, a mirror image snapshooting module and a snapshot comparison module, wherein the backup server is used for storing backup information of at least one virtual machine; the virtual management module is used for selecting the virtual machines required to be backed up; the mirror image snapshooting module is used for creating snapshots for disk mirror images of the virtual machines; and the snapshot comparison module is used for judging whether backup records of the selected virtual machines exist in the backup server and comparing the existent backup records with the created snapshot information if the backup records exist to store and back up differential information in the backup server. According to the system, the mirror image snapshooting module is utilized for snapshooting the virtual machines as needed, and the differential information is quickly extracted for backup storage when the mirror image snapshots of the virtual machines are not the same as the backup information, so that the utilization efficiency of mirror image storage is improved. Furthermore, the invention provides a backup method.

The invention discloses a block level backup method based on content address storage, which comprises the steps that A, according to a size and a threshold of a predefined data segment and a source volume state bitmap, and by taking a data block as a unit, and a continuous 1 sequence in the source volume state bitmap as a basis, a source volume data area is segmented, and each single segment is named as a data segment; and B, according to a fingerprint algorithm, a data segment fingerprint is computed, an old fingerprint of each data segment is acquired by querying a fingerprint library, whether each data segment is a repeating data segment or a non-repeating data segment is determined, each non-repeating data segment is transmitted to a storage medium by a network, and the fingerprint library is updated. The invention further provides a client based on the content-addressed storage and a network storage system. With the adoption of the technical scheme, high-efficiency de-duplication can be achieved.

The embodiment of the invention provides a backup method and device. The method comprises the following steps of: at the current incremental backup time, creating a snapshot at the current backup time; according to the differential bitmap created at the previous backup time and the snapshot at the current backup time, carrying out the incremental backup; and the differential bitmap being created at the previous backup time, and being updated along with the change in data in a source follower disk before creating the snapshot at the current backup time. The differential bitmap is created at the previous backup time and is updated according to the change in data in the source follower disk between the two backup times, so that the backup can be carried out according to the differential bitmap which is created at the previous backup time and is updated along with the change in data in the source follower disk between the previous backup time and the current backup time, and the bitmap can be generated without snapshot comparison at the current backup time, so that the backup time is shortened, and the overall performance of backup is improved.

The invention discloses a logical log generating method, which comprises: Acquiring the operation description included in the request of database operation; Generating a logical log comprising the only identified tag and the operation type tag of the operation object in accordance with the operation description; Wherein the operation type tag comprises a delete operation type tag or an overwriting operation type tag. Utilizing the logical log generating method, the invention also provides a database backup method and a database recovery method based on the logical log generating method. If the method provided in by the invention is used for physical backup of a database, the database can receive other operation requests, and physical backup data can be completely recovered when the database is recovered.

A load control system includes: a power supply control unit for controlling a power feeding to multiple load devices; and a backup power supply unit for supplying backup power during a power failure. During a power failure, the power supply control unit supplies the power from the backup power supply unit only to a part of load devices selected among the load devices, and the load devices are devoid of communications function for communicating with the power supply control unit.

The invention relates to an Oracle multichannel parallel backup and recovery method. The method comprises the following steps: establishing a plurality of channels for sending Oracle data blocks through a media management library; opening a plurality of threads through a backup software client to be paired and connected with the channels; reading the data of a database in parallel through the channels to generate data blocks in a fixed size; sending the data blocks to the backup software client in parallel; receiving the data blocks sent by corresponding channels through the threads of the backup software client; and sending the data blocks onto a remote storage. Compared with the prior art, the Oracle multichannel parallel backup and recovery method has the advantage that parallel data transmission is utilized to improve the data transmission efficiency so that the data backup and recovery time under Oracle big data background is effectively shortened.

At the start of a backup operation, the controller of a disk array apparatus makes a copy of an address translation table and searches for a valid logical address based on the copy. From the disk array, the controller reads a physical stripe including a data block of a physical address corresponding to the valid logical address searched for. The controller writes a data block corresponding to a valid logical address included in the read physical stripe in a mass storage device.

A back-up device of internal memory is prepared as connecting internal memory to waiting storage controller being used to latch address bus and data bus of internal memory, copying content of internal memory into nonvolatile storage connected with waiting storage controller by waiting storage controller when internal memory bus is on idle state for finalizing internal memory back-up, connecting waiting storage controller on bus of internal memory and setting operation of internal memory controller to be prior than that of waiting storage controller.

The invention discloses a real-time online comprehensive compensation device for voltage sag of a distribution network and a method thereof. Through arranging a device on a high voltage side or a lowvoltage side of a distribution transformer, voltage is dynamically adjusted and output. The device can solve problems of voltage sag and power quality exist commonly in a distribution network, and effectively guarantees reliability of sensitive load power consumption. The device solves problems that a traditional voltage sag compensation device has insufficient compensation depth and difficult maintenance, and can reduce energy consumption, save installation space and reduce equipment operation cost, and has good economic benefits.

The invention relates to a synthetic backup method, a device, a computer device and a computer-readable storage medium of a MySQL database. The method comprises: if the database to be backed up is thefirst backup, the database is backed up completely; if the database is the second backup, the database is backed up completely; if the current database to be backed up is not the first backup, the incremental data between the current database to be backed up and the last backed up database is obtained, and the incremental data is backed up; the backed up incremental data is synthesized into the last backed up data to generate the current number of backups. The composite backup method of the MySQL database comprises the following steps: the first backup is performed for full backup, and the subsequent backup only needs to synthesize the incremental data into the last backup data, so that the backup time is shortened to the time of backing up the incremental data; the new backup data obtained from each backup is a virtual full backup, and only incremental data is stored between two consecutive virtual full backups, which saves storage space. Effectively improves the efficiency of backups and reduces the storage space used by backups.

The invention discloses a method and a system for retrieving FLASH data from a mobile telephone, and the mobile telephone. The method comprises the following steps of: setting at least two keyboard unlocking passwords in a user management setting module of the mobile telephone, wherein one of the keyboard unlocking passwords is an administrator user account number password, while the others are limited user account number passwords; when the frequency of receiving wrong passwords by the mobile telephone exceeds the preset value, copying the FLASH data of the mobile telephone to a mobile data server through a wireless network by using the user management setting module; and sending user authentication information to the mobile data server through the wireless network by using the mobile telephone, and after the user authentication information passes authentication, sending the copied FLASH data to the mobile telephone through the wireless network by using the mobile data server. The mobile telephone comprises the user management setting module and can prevent the FLASH data from being stolen and retrieve the FLASH data, so that the loss of a user is farthest reduced.

The invention provides a data backup system and method, which comprises a source storage and a destination storage, wherein, the data backup system comprises a generating and reading unit of backup information, which is used for generating and reading backup configuration information, and leading the data backup system to selectively backup at least one part of data stored in the source storage into the destination storage. The method comprises steps which are acquiring the backup configuration information; and selectively backing up at least one part of data stored in the source storage into the destination storage according to the acquired backup configuration information. The invention can selectively backup data of the source storage into the destination storage according to user requirements, thus avoiding duplicate data existing in the destination storage device, saving storage space and reducing backup time.

The invention discloses a database backup allocation method and a database backup allocation device. The method includes steps of generating a backup strategy according to IP information of a to-be-backup allocation server and to-be-backup database edition information; analyzing the type of the to-be-backup database and judging if the backup is performed in the backup database according to the backup strategy; if it is, performing backup at the to-be-backup database; judging if the server load of the to-be-backup allocation server can meet the preset backup threshold value; if it is, performing backup on the data of the to-be-backup database according to the backup strategy, and storing the acquired backup data. Through the method and the device, the database backup efficiency is improvedand the stability of a business system is guaranteed.

The invention provides a metadata management method and apparatus, and a distributed file system. The method comprises the steps of calculating differential data of current metadata and backed-up metadata by adopting a differential algorithm during metadata backup; and recovering the current metadata by utilizing the differential data and the backed-up metadata during metadata recovery. By implementing the method and the apparatus, metadata backup and recovery are quickly performed by utilizing a quick differential algorithm and a differential recovery algorithm; an original backup disk space uses order of magnitude reduced to MB from GB; quick backup and recovery of the metadata are realized; and a backup duration of massive metadata of the distributed file system can be shortened to a few minutes from a few hours originally.

The invention discloses a virtual machine data backup optimization method and system. The method includes: step 1, installing VDBA plug-in on a virtualization server, configuring VDBA IP address of the virtualization server, and establishing a safety communication channel between the virtualization server and the VDBA plug-in; step 2, determining selection and backup dispatching and data retentionof a virtual machine to be backed up by the virtualization server,, and assigning and sending to the VDBA plug-in as a selection result; step 3, after the VDBA plug-in receives the selection result,and making virtual machine snapshot according to the selection result; step 4, mounting the virtual machine snapshot on the VDBA plug-in, and judging whether repeating data exist or not; step 5, if yes, clearing repeating data of the virtual machine snapshot to take as backup data; step 6, enabling the VDBA plug-in to transmit the backup data to a backup server. The repeating data are detected anddeleted through the VDBA plug-in, so that storage space is greatly saved, a backup process is accelerated, and backup efficiency is improved.

The invention discloses an automatic data recovery method based on a relational database. The method comprises the steps of full-amount backup and increment backup, wherein in the full-amount backup step, all data of the database is subjected to memory transfer every time, and the backups of all the data are generated; in the increment backup step, only the data which is updated after full backup on the last time is subjected to memory transfer, and the backups of the data are generated. By means of the method, the database can be completely recovered, moreover, incomplete recovery based on some backup time point can be conducted on the database, and meanwhile, the backup time is greatly shortened.

The embodiment of the invention provides a virtual machine backup method and component and a cloud computing system, and relates to the technical field of computers, and the method comprises the steps: receiving a virtual machine backup request sent by a cloud gateway platform, the virtual machine backup request comprising first target virtual machine identification information of a first target virtual machine and a backup demand; determining to-be-backed-up data of the first target virtual machine in the cloud storage platform according to the first target virtual machine identification information; determining a target backup storage pool in the cloud storage platform according to the backup requirement and the to-be-backed-up data; and reading the to-be-backed-up data through a data pipeline technology, and writing the to-be-backed-up data into the target backup storage pool. The virtual machine backup method has universality and can meet backup requirements of all cloud computingplatform users.