34results about How to "Data lost" patented technology

The embodiment of the invention provides a method and a device for processing a client log. The method comprises the following steps of adopting a double buffering mechanism, previously setting two MMAP (map files or devices into memory) internal memories to be respectively used as a current buffering area and a standby buffering area, switching the standby buffering area to be the current buffering area when the current buffering area is filled, and transmitting a log stored in the filled buffering area to a distributed file system to be stored, so that the problem that the log processing capacity is limited because the quantity of the processed logs is limited by the limit space of the existing disk can be solved. Due to the characteristics of the MMAP technology, in the operation process, the data in the buffering area can be forcedly outputted to the disk by the system, so that even if a server is restarted or collapsed, the data stored in the buffering area can be restored through the disk without being lost, and the safety of the log stored in the buffering area can be guaranteed.

The invention relates to the field of computers, aiming at solving the problem existing in the prior art that the speed for restarting a large software is slow. The embodiment of the invention provides afast switching method based on progress emigration/immigration and a device thereof, wherein the method comprises the following steps: obtaining context information of the software process and identifying information of the process according to preset triggering conditions when the software is operating, and moving the information into a memorizer; displaying the stored identifying information of the process to the user according to the user instruct or when the user restarts the software; loading the context information of a certain process into the internal memory of the operation system according to the user choice and continuously executing the process. Through the method and the device, the user can control that which process is to be recovered, and can largely improve the starting speed of the process, and can recover all the data of the process when the process is closed in the last time.

The invention provides a communication system distributed method based on Redis. The method comprises the following steps that a client establishes Websocket long connection with a gateway layer of aGateway gateway cluster through an Nginx cluster; the Gateway gateway cluster acquires a message processor cluster acquisition node list and requests a message processor to establish connection; the client sends a message and forwards the message request to a message processor, and the message processor publishes the message to the Redis; for a subscribed client, a publisher Redis Stream structurecan create a corresponding Consumer Group through xadd, and then other clients ensure that a message is reliably consumed through the xadd Group and an ack mechanism. Message pushing and subscriptionservices are integrated to independently form a message processor cluster, and the health state of each node is monitored and subjected to cluster deployment through an Eureka registration center cluster, so an efficient service mode of high availability and distributed cluster deployment is achieved.

The invention discloses a data center inspection robot. The data center inspection robot comprises a robot body and a robot body driving device, and further comprises a six-degree-of-freedom manipulator, an obstacle avoidance device, a temperature and humidity sensor, a gas sensor, a wind speed sensor, a touch display, a processor, a controller and a monitoring camera. The obstacle avoidance device, the temperature and humidity sensor, the gas sensor, the wind speed sensor, the monitoring camera and the touch display are all connected with the processor; the processor is connected with the controller; the robot body driving device, the six-degree-of-freedom manipulator, the obstacle avoidance device, the temperature and humidity sensor, the gas sensor, the wind speed sensor, the touch display and the monitoring camera are connected with the controller; and the processor is connected with a memory. The data center inspection robot replaces manual inspection, the defects of manual inspection are completely overcome, and a video avoidance system and various sensors do not need to be mounted in a machine room, so that the construction cost and the management cost of the machine room are greatly lowered.

The invention discloses a file data caching method, a server and a terminal. The method comprises the steps of when a file data accessing request sent by the terminal is received, searching cache equipment to determine whether or not file data corresponding to the file data accessing request exists, wherein the cache equipment supports accessing of file-type data and nonvolatility; when the file data corresponding to the file data accessing request is found out from the cache equipment, sending the file data in the cache equipment to the terminal; when the file data corresponding to the file data accessing request is not found out from the cache equipment, searching storage equipment to find out the file data corresponding to the file data accessing request, sending the file data in the storage equipment to the terminal, and storing the file data in the cache equipment.

The embodiment of the invention provides power supply device and method. The method comprises the following steps of: controlling a first power supply to be opened for supplying power for a power receiving device and controlling a standby power supply of the first power supply to shut down; when the first power supply is in failure, leading a cell to be in a power supply state and controlling the standby power supply of the first power supply to start to supply power for the power receiving device. By using the power supply device and method, data in the power receiving device can not be lost due to power failure; and because the first power supply and the standby power supply of the first power supply do not simultaneously supply power for the power receiving device, the efficiency of the power supply is improved.

The invention discloses a fixed type wireless radio frequency reader-writer. The fixed type wireless radio frequency reader-writer comprises a digital circuit board and a radio frequency circuit board which are connected, wherein the digital circuit board consists of a master control module, and a power supply and indicator lamp module, a serial port control module, an Ethernet module, a wireless expanding module, an EEP ROM (Electrically Erasable Programmable Read-Only Memory) module, an interface module and a debugging module which are connected with the master control module respectively; the radio frequency circuit board consists of a radio frequency read-write module and a control module which are connected with each other, as well as a power supply module, a low-pass filter module, an external power amplification module, a coupler module which are connected with the radio frequency read-write module respectively, and a radio frequency switch and an antenna port module, the control module is connected with the interface module, and the external power amplification module is connected with the antenna port module through the coupler module and the radio frequency switch module.

The invention discloses a method and system for managing data mapping in an SSD Cache. The method comprises the steps of dividing the storage space in a hard disk drive (HDD) and the storage space inthe solid state disk (SSD) Cache into N HDD modules and M SSD modules in advance correspondingly, and conducting sequential labeling separately, wherein N is smaller than M; caching data in the N HDDmodules to the SSD modules with no cached data in the M SSD modules one by one, and establishing a label mapping relationship between the HDD modules and the SSD modules; storing the label mapping relationship to the SSD Cache so that the label mapping relationship stored in the SSD Cache is restored to a memory conveniently after the system is started. Under the condition that the system is restarted or powered off, the data in the SSD Cache cannot get lost; thus, by means of the method, after the system is started, the stored label mapping relationship is restored to the memory, and therefore the access efficiency of the system is improved.

The invention relates to the field of automatic monitoring of landslide disasters, in particular to a landslide deep integrated real-time monitoring device, which comprises an index monitoring column,a data processing box and a power supply unit; the index monitoring column is buried into the deep part of a landslide body to a sliding bed part through a geological drill hole in the landslide surface; the data processing box is riveted above the index monitoring column through an I-shaped bearing component, and a measuring line in the data processing box is connected with the interior of the index monitoring column. The device can monitor the whole-process change of the landslide, can be perfectly suitable for both initial micro displacement and middle and later horizontal large displacement, is large in measurement range and high in precision, can achieve integrated automatic monitoring, can quickly and comprehensively monitor and evaluate the landslide in real time, is high in practicability, and has a good application prospect.

The invention discloses a card reader reading permission verification method based on a block chain, and relates to the field of card reader safety card reading. The method aims to solve the problemsthat the internal module is complex and the safety degree is low due to the fact that a safety module is embedded in an existing card reader. According to the card reader reading permission verification method based on the block chain, an authentication certificate capable of confirming the reading permission is stored in the block chain in combination with a block chain technology, so that the authentication certificate is not easily tamper, and the security is enhanced. Meanwhile, even if the data of one block chain server side is damaged, the other block chain server sides in the block chain can be requested to obtain the verification data, that is, the data of the verification permission cannot be lost, and the reliability is further enhanced. Moreover, the verification information isstored in the block chain, and a security module does not need to be additionally arranged in the card reader, so that the module structure of the card reader is simplified.

The invention discloses a sewing machine management method, which is applied to a management terminal provided with a target APP, and comprises the following steps: when a to-be-processed sewing machine using new electronic control exists, modifying an initial ID number in the new electronic control into an original identification ID number of the to-be-processed sewing machine, so as to enable the to-be-processed sewing machine to be matched with a virtual sewing machine registered in the target APP; and issuing the historical operation data of the to-be-processed sewing machine stored in the cloud to a new electric controller through the virtual sewing machine. According to the invention, the ID number in the new electronic control can be modified through simple operation on the APP; therefore, the to-be-processed sewing machine subjected to electric control replacement can be matched with the virtual sewing machine in the APP, it is guaranteed that the to-be-processed sewing machine can be normally controlled in the application of the Internet of Things, and meanwhile data stored in the cloud and generated in the sewing process of the sewing machine cannot be lost. The invention further discloses a sewing machine management system and device and a computer readable storage medium, which have the above beneficial effects.

The invention discloses a hierarchical data possession proving method capable of public auditing. A user processes a file to be stored by layering and then partitioning, and the method mainly comprises the following steps that: (1) the user generates a verification label for each data block, and then sends the data blocks and the corresponding labels to a cloud storage service provider; (2) the third-party audit initiates challenges to the cloud storage service provider; (3) the data storage party generates possession evidence by using the stored data block information and the corresponding label information, and sends the evidence to the third party for auditing; (4) the third-party audit judges whether the data is complete or not by using public information and possession evidence of the user; and (5) if a data block is damaged, fine granularity authentication is performed by taking the damaged data block as a center until the detection granularity is minimum.