36results about How to "Avoid unrecoverable" patented technology

The embodiment of the invention discloses a distributed storage method and device, computer equipment and a storage medium. The method comprises the steps of grouping a to-be-stored file to form multiple data groups; forming at least three data fragments from all the data groups, wherein each data fragment comprises part of data groups, and each data group is added to at least two data fragments;distributedly storing all the data fragments in distributed storage nodes; recording a corresponding relationship between the data fragments and the data groups, and a corresponding relationship between the storage nodes and the stored data fragments; deleting the local to-be-stored file. According to the technical scheme, a user conveniently stores files in a distributed network to lower the storage cost, the privacy and safety of the stored files can be effectively improved, and thus an attacker is prevented from restoring original files.

The invention discloses a test method and device of a Linux operating system, wherein the method comprises the following steps of: S101, configuring a test module in a first operating system under the condition that the first operating system is started to obtain a second operating system, wherein the test module is used for testing the second operating system; S103, testing the second operating system by the test module according to preset test parameters; and S105, after the test is finished, restoring the second operating system according to the first operating system which is backed up in advance. Through the test method and device, compiling complex test programs according to different operating systems is not needed, the test difficulty is lowered, and test universalization is realized; in addition, a changed operating system can be restored after the test is finished, so that the problem that a file is damaged and cannot be restored in the test process can be avoided, and the test reliability can be improved.

The invention discloses a communication method and a communication device for parallel query of clustered databases. The communication method comprises the following steps: dividing query results coming from query nodes to obtain division blocks; transmitting the division blocks to a target node in an independent data file form; under the condition of transmitting all the data files to the target node, performing data merging on the data files on the target node. Through the transmission of the query results in an independent data file form, the query results are still saved in a magnetic disk when the data nodes or networks fail, so that the problem that communication data between the database nodes is lost and not easy to recover when the data nodes or the networks fail is avoided.

The invention discloses a battery heating control device and a heating control method. The heating control device comprises at least three heating modules, at least three temperature detection modules, a control module and first switches, wherein the heating modules are in one-to-one correspondence with battery cell groups, and the heating modules heat battery cells in the corresponding battery cell groups when being started; the temperature detection modules are in one-to-one correspondence with the battery cell groups, and the temperature detection modules are used for detecting a real-timetemperature of the battery cells in the corresponding battery cell groups and generating temperature detection signals; the first switches are arranged corresponding to the heating modules; and the control module adjusts a starting state of the corresponding heating modules through the first switches according to the temperature detection signals and a received external power supply signal, and adjusts heating power of the corresponding heating modules through the first switches according to the received temperature detection signals so as to make a temperature difference value between the battery cell group with a maximum temperature and the battery cell group with a minimum temperature be less than or equal to a set difference value. Through the technical scheme of the invention, consistency of the battery cell temperatures is improved.

The invention discloses an application method of a block chain technique to a secondary water supply facility. The secondary water supply facility comprises a plurality of secondary water supply pumprooms, each secondary water supply pump room comprises a community monitoring central control room and a safe water tank, each community central control room is provided with a local memory, the secondary water supply pump rooms serve as cloud nodes, all data corresponding to the local memories are uploaded to a cloud end through a network to perform cloud storage, data corresponding to all cloudnodes except for local cloud nodes are simultaneously backed up by the cloud nodes by the aid of the network and the block chain technique, and the local memories and the data stored by the cloud endsare encrypted. According to the method, an anti-terrorism security architecture of key data in secondary water supply process is achieved by the aid of the block chain technique, wherein the key datacannot be amended and destroyed and can be recovered and traced, data safety is improved, and the method avoids the problem that the data cannot be recovered due to unrecoverable terrorist attack.

The embodiment of the invention discloses a web page tamperproof method and a device. The method comprises the following steps: receiving a file operation request for a target web page file; monitoring whether to access an operation table corresponding to the target web page file; if yes, judging whether the file operation request is a web page tampering operation request; if so, refusing to respond to the file operation request. By applying the embodiment of the invention, the risk that the web page file cannot be recovered after being tampered with can be avoided.

The embodiment of the invention provides a data management method and device, electronic equipment and a storage medium. The data management method includes: detecting whether the to-be-managed data table in the database meets a preset filing condition or not; if yes, modifying the pointing direction of a data table pointer pointing to the to-be-managed data table from the to-be-managed data tableto a preset standby data table corresponding to the to-be-managed data table, and performing filing processing on the data stored in the to-be-managed data table, and performing defragmentation processing on the to-be-managed data table after all the data stored in the to-be-managed data table is subjected to filing processing. According to the method, before data in the to-be-managed data tableis archived, the pointing direction of the data table pointer pointing to the to-be-managed data table is modified into the corresponding alternative data table, so that the influence on data writingduring subsequent archiving processing and fragmentation processing is avoided, and the data can be normally written into a database.

The invention provides a cloud resource pool management system and method. The system comprises production VC, at least one production VC is deployed in each data center, and the production VC is usedfor managing a service virtual machine of the data center; and the management VC is used for uniformly managing and scheduling all production VC. According to the embodiment of the invention, the method comprises the following steps: through two levels of management architecture, the production resources and the service virtual machines are managed by the management VC, and high availability is provided for the service virtual machines for producing VC, so that unified management and scheduling of a resource pool are realized, meanwhile, VC distributed in a plurality of data centers is subjected to unified management, the management efficiency of the resources is improved, and the operation and maintenance capability of the cloud resources is improved.

The embodiment of the invention discloses a mileage backup method and device and a vehicle, and relates to the technical field of automobile electronics, by adopting the backup method, a diagnostic instrument is not needed, the operation is convenient, and the problem that the mileage of spare parts is mistakenly backed up to cause unrecoverability when a replacement mode is used for troubleshooting in the market can be avoided. The mileage backup method comprises the steps that after a vehicle is powered off, the controller locally stores instrument mileage data sent by an instrument when thevehicle is powered on as controller mileage data; after a vehicle is powered on, a controller sends a mileage backup signal to an instrument when receiving a trigger signal of a key with a mileage backup activating function and sends locally stored mileage data of the controller to the instrument, and then the instrument stores the mileage data, sent by the controller, of the controller accordingto the mileage backup signal.

The embodiment of the present invention discloses a network selection method and user equipment, which are used to solve the problem that the data service is interrupted when the UE residing in the LTE network falls back to the 2G/3G CS network and executes the CS service, and returns to the LTE network. The rate at which the UE returns to the normal registration state of the LTE network. The method in the embodiment of the present invention includes: the user equipment falls back to the 2G or 3G network to perform the CS service from the first LTE cell, the network type of the first LTE cell is the first type, and when the user equipment performs the CS service on the 2G or 3G network, it ends , measure the LTE cells according to the LTE network information, obtain the measurement results for each LTE cell, and select the second LTE cell from the LTE cells whose measurement results meet the preset conditions to access the LTE network. The network type of the second LTE cell is the specified Describe the first type.

The invention relates to a server system backup recovery method and device, computer equipment and a storage medium, and the method comprises the steps: adding a backup hard disk locally or mapping aremote hard disk through a network, and making a partition backup of the system of the server through a recovery service of the server; when the server crashes, firstly starting the server to a winpeenvironment, and checking the partition state of the current server in the winpe environment; if the partition exists, installing a backup file in a previously backed-up hard disk by utilizing a diskmanagement tool and generating a virtual partition; generating a wim file from the virtual partition and recovering the wim file to a system partition; and setting the system partition as a starting partition, and normally entering the system after the server is restarted. According to the method, the server system can be backed up in real time, and the server can be quickly recovered when the server is abnormal, so that the problem that the system cannot be recovered after downtime is avoided, and the reliability of the server system is improved.

The invention discloses a signature device for large-amount electronic payment, which comprises an electronic pen binding mechanism, the electronic pen binding mechanism comprises an electronic pen, the electronic pen binding mechanism further comprises a folding and unfolding main body, a support frame and a rotating seat, the lower end of the support frame is fixedly connected to the upper end of the rotating seat, and the rotating seat is fixedly connected to the upper end of the folding and unfolding main body. The take-up and pay-off body and the supporting frame are rotationally installed together, the take-up and pay-off body comprises a first winding roller, a binding line, a first rotating shaft, a second winding roller, a pull rope and a heavy block, the upper end of the electronic pen and the lower end of the binding line are fixedly connected together, and the other end of the binding line and the first winding roller are fixedly installed together; the binding wire is wound at the inner end of the first winding roller, one end of the first rotating shaft is fixedly connected with the first winding roller, and the other end of the first rotating shaft is fixedly connected with the second winding roller. The invention relates to the technical field of electronic pen binding, and can improve the cleanliness of a desktop and better meet the use requirements.

The invention discloses a plate levelness detection device for mechanical manufacturing, and the device comprises a supporting platform, the outer wall of the supporting platform is sleeved with a movable plate, the top of one side of the movable plate is fixedly connected with a top plate, one side of the top of the top plate is provided with a threaded hole, the inner wall of the threaded hole is provided with a threaded rod, and the bottom of the threaded rod is provided with a detection mechanism. A fixing plate is fixedly connected to one end of the top of the supporting table, an abutting plate is fixedly connected to the other end of the top of the supporting table, a clamping plate is placed at one side of the top of the supporting table, and connecting bases are fixedly connectedto one side of the clamping plate and one side of the fixing plate. Whether the pressure of a pressure gauge is changed or not is observed, the levelness of a plate can be conveniently detected, the distance between the clamping plate and the fixing plate is increased through the steel sheet, the plate can be conveniently fixed, the deformation strength of the steel sheet is rapidly stabilized through a magnet strip, and the plate is rapidly clamped and fixed.