51results about How to "Easy Data Recovery" patented technology

A “forward” delta data management technique uses a “sparse” index associated with a delta file to achieve both delta management efficiency and to eliminate read latency while accessing history data. The invention may be implemented advantageously in a data management system that provides real-time data services to data sources associated with a set of application host servers. To facilitate a given data service, a host driver embedded in an application server connects an application and its data to a cluster. The host driver captures real-time data transactions, preferably in the form of an event journal that is provided to the data management system. In particular, the driver functions to translate traditional file/database/block I/O into a continuous, application-aware, output data stream. In an illustrative embodiment, a given application aware data stream is processed through a multi-stage data reduction process to produce a compact data representation from which an “any point-in-time” reconstruction of the original data can be made.

Systems and methods for visible light communication are disclosed. In part, illumination devices and related systems and methods are disclosed that can be used for general illumination, lighting control systems, or other applications. The illumination devices synchronize preferentially to the AC mains to produce time division multiplexed channels in which control information can be communicated optically by the same light source that is producing illumination. Such illumination devices preferentially comprise LEDs for producing illumination, transmitting data, detecting ambient light, and receiving data, however, other light sources and detectors can be used. The physical layer can be used with a variety of protocols, such as ZigBee, from the Media ACcess (MAC) layer and higher.

A method and apparatus for data recovery in a system involving a first data store acting as a standard device and a physical moving mirror data store that operates as moving mirror with a first mode to be synchronized and in a second, isolated mode. In response to a command to establish a third or protected restore operating mode, the data to be transferred in response to that command is identified. A restoration procedure copies data from the second data store to the first store to recover any data that may have been corrupted in the second data store. An update procedure acts on the restored data concurrently with the restoration procedure.

The invention discloses a method for storing and retrieving massive small files. By adoption of the method, when a user backs up files, the files can be subjected to differential backup according to days, hours and minutes as required, and during the backup, only corresponding file folders are needed to be copied into a backup disk; due to a reasonable design of a file storage organization structure and necessary file merging, even if the files are backed up according to days, the number of the files required to be backed up is 24*60=1440 at most, so that to problem of low copying speed of the massive small files; and when the files are recovered, only the backed up file folders or the files are copied to a corresponding file folder according to names of the backed up file folders and the files. The whole backup and recovery processes are simple and convenient, and the aim of easily and conveniently performing backup and data recovery can be fulfilled while the massive small files can be quickly stored or retrieved.

A channel estimation method, comprising the steps of: receiving radio signals transmitted through wireless channel; calculating the channel fading coefficients of pilot symbols, which inserted in a time slot allocated to the wireless signals; estimating the channel fading coefficients of each of predefined groups of chips in the time slot step by step, by utilizing the channel fading coefficients of the pilot symbols and the correlation between the pilot symbols and traffic data in the time slot, wherein each group of chips is composed of predefined number of chips.

The present invention discloses a transmitter and receiver for use with an orthogonal frequency division multiplexing (OFDM) communications system. In one embodiment, the OFDM communications system includes an OFDM transmitter that generates a training sequence that includes a fractional tone in a guard band thereof and transmits the training sequence via a channel. The OFDM communications system further includes an OFDM receiver that receives the training sequence and employs the fractional tone to obtain a channel response estimate.

Apparatus and methods detect the presence of an isolated pulse in a communications signal, such as a data signal carrying data for a serializer/deserializer (SerDes). An example of an isolated pulse is a “1” pulse preceded and followed by “0” pulses, or a “0” pulse preceded and followed by a “1” pulse. These isolated pulses can exhibit a narrow pulse width, and under severe jitter conditions, may not align with a baud sample point, which can cause the isolated pulse to be missed, resulting in a data decoding error. By detecting the presence of these isolated pulses and determining the most likely baud period to which they belong, jitter tolerance can be improved for many channel conditions. This can improve jitter tolerance of a SerDes receiver for links that suffer from various sources of Deterministic Jitter (DJ) such as Duty Cycle Distortion (DCD) and Inter-Symbol Interference (ISI).

The invention relates to a method for isolating data in a multi-tenant architecture. A data base and a data base table are created remotely for the tenants, the remote data base table is issued as the WSDL (web service description language) service, and the WSDL service is registered in a cloud computing server so as to be convenient for the tenants to call and use. When a plurality of tenants access to the server at the same time, the server configures according to the uniqueness of the domain name and related authorities and distinguishes by using the fields in the data base table so that the basic data of each tenant can be partially isolated, and then the server creates an independent data base for each tenant, therefore, the data of the tenants can be fully isolated, and the operation of the tenants can not affect one another and is safe.

A method for storing electronic data in a network including a server and at least two client machines. Electronic data may be archived in a predetermined location of a client machine. A local archiving list may be generated on the client machine and may include descriptive properties of the electronic data, as well as the predetermined location. The local archiving list may be transmitted from the client machine to the server to generate a global archiving list, which may then be transmitted to any other client machines in communication with the server. In this manner, each client machine in the network may store the location and descriptive properties of the archived electronic data to facilitate electronic data recovery.

The present technology includes a memory controller and a method of operating the same. The memory controller controlling an operation of a memory device includes a parity module configured to perform one or more exclusive OR operations using data to be stored in the memory device and generate parity according to the one or more exclusive OR operations, and a recovery controller configured to control the parity module to store the parity in the memory device based on the number of times the exclusive OR operation is performed.