Abstract: An apparatus for correcting and detecting multiple spotty-byte errors within a byte occurred in a limited number of bytes and which has a function capable of controlling multiple spotty-byte errors within a byte occurred in the limited number of bytes, is provided. The apparatus for correcting and detecting multiple spotty-byte errors within a byte occurred in a limited number of bytes, comprises an encoding means for generating a transmitted word based on input information data; and a decoding means for inputting the transmitted word where errors occurred in an information transmission channel as a received word and correcting and detecting the errors. The encoding means generates the transmitted word by adding check information generated based on a parity check matrix expressing a spotty-byte error control code and the input information data to the input information data.

Abstract: In a stream data processing method in which part of stream data is defined as a processing target and the time control information which indicates the advance of the time is inserted into the stream data, time information of the received stream data is stored in a next ignition time holding area as an ignition time. A processing module for generating the time control information at a time different from the time of reception of the stream data is extracted out of a query that indicates how the stream data is to be processed. Based on the extracted processing module and the time information indicating the time of the reception of the stream data, the ignition time is calculated and stored in the next ignition time holding area. The time generation module inserts the time control information at the ignition time held in the next ignition time holding area.

Abstract: The reliability is improved at a low cost even in a virtualized server environment. The number of spare servers is reduced for improving the reliability and for saving a licensing fee for software on the spare servers. A server system comprises a plurality of physical servers on which a plurality of virtual servers run, a single standby server, a module for detecting an active virtual server, and a module for switching the correspondence of boot disks of virtualization modules for controlling virtual servers to the physical servers. When a physical server fails, the boot disk of the associated virtualization module is connected to a spare server to automatically activate on the spare server those virtual servers which have been active upon occurrence of the failure.

Abstract: In order to make real time and the avoidance of risk compatible according to the contents of processing by an application, an index ID applying module applies an index computed utilizing streams before and after stream data to the stream data, computes the index again according to a stream that varies every moment, applies an index computed based upon the index of the stream data to the result of the processing of the stream data according to a predetermined procedure and outputs it. An application that receives the result of the processing and the index of the result of the processing switches processing depending upon the index.

Abstract: Provided is an effective index processing method for a key corresponding to characteristics of a key series. The index processing method includes: holding a key tendency for representing the characteristics of the key series and a node split ratio, corresponding to the key tendency, for representing a key split ratio at the time of node split; and switching the node split ratio of an index (162) based on the key tendency. The key tendency/distribution is determined based on characteristic information of data input by a user or monitoring information acquired through monitoring of the data.

Abstract: The reliability is improved at a low cost even in a virtualized server environment. The number of spare servers is reduced for improving the reliability and for saving a licensing fee for software on the spare servers. A server system comprises a plurality of physical servers on which a plurality of virtual servers run, a single standby server, a module for detecting an active virtual server, and a module for switching the correspondence of boot disks of virtualization modules for controlling virtual servers to the physical servers. When a physical server fails, the boot disk of the associated virtualization module is connected to a spare server to automatically activate on the spare server those virtual servers which have been active upon occurrence of the failure.

Abstract: Provided is a stream data processing method that can effectively handle delay data. In the stream data processing method of processing data whose lifetime is defined by a window, an operation result excluding a delay tuple is immediately output along with an unconfirmed flag according to delay processing HBT while a midway processing result necessary for reproduction is retained along with the lifetime, and when the delay tuple arrives, a correct processing result is calculated from the delay tuple and the processing result restore tuple.

Abstract: In a stream data processing method in which part of stream data is defined as a processing target and the time control information which indicates the advance of the time is inserted into the stream data, time information of the received stream data is stored in a next ignition time holding area as an ignition time. A processing module for generating the time control information at a time different from the time of reception of the stream data is extracted out of a query that indicates how the stream data is to be processed. Based on the extracted processing module and the time information indicating the time of the reception of the stream data, the ignition time is calculated and stored in the next ignition time holding area. The time generation module inserts the time control information at the ignition time held in the next ignition time holding area.

Abstract: The present invention provides a method for processing stream data and a system thereof capable of implementing general data processing including recursive processing with low latency. In the system for processing stream data, a single operator graph is prepared from operator trees of a plurality of queries, an execution order of the operators is determined so that execution of a streaming operator is progressed in one way from an input to an output, the ignition time of an external ignition operator that inputs data from the outside of the system and an internal ignition operator that time-limitedly generates data is monitored, and an operator execution control unit repeats processing that completes the processing in the operator graph at the time according to the determined operator execution order, assuming the operator of the earliest ignition time as a start point.

Abstract: The reliability is improved at a low cost even in a virtualized server environment. The number of spare servers is reduced for improving the reliability and for saving a licensing fee for software on the spare servers. A server system comprises a plurality of physical servers on which a plurality of virtual servers run, a single standby server, a module for detecting an active virtual server, and a module for switching the correspondence of boot disks of virtualization modules for controlling virtual servers to the physical servers. When a physical server fails, the boot disk of the associated virtualization module is connected to a spare server to automatically activate on the spare server those virtual servers which have been active upon occurrence of the failure.

Abstract: The reliability is improved at a low cost even in a virtualized server environment. The number of spare servers is reduced for improving the reliability and for saving a licensing fee for software on the spare servers. A server system comprises a plurality of physical servers on which a plurality of virtual servers run, a single standby server, a module for detecting an active virtual server, and a module for switching the correspondence of boot disks of virtualization modules for controlling virtual servers to the physical servers. When a physical server fails, the boot disk of the associated virtualization module is connected to a spare server to automatically activate on the spare server those virtual servers which have been active upon occurrence of the failure.

Abstract: Provided is a stream data processing method that can effectively handle delay data. In the stream data processing method of processing data whose lifetime is defined by a window, an operation result excluding a delay tuple is immediately output along with an unconfirmed flag according to delay processing HBT while a midway processing result necessary for reproduction is retained along with the lifetime, and when the delay tuple arrives, a correct processing result is calculated from the delay tuple and the processing result restore tuple.

Abstract: A mechanism for managing ranking information using a sign of a stream tuple generated when stream data is inserted into, or deleted from, a window is provided. A mechanism for generating only the differential information of ranking calculation results, a mechanism for adding ranking information according to a request, an interface for generating and outputting all ranking information from the differential information, a mechanism for generating all ranking calculation results, and an interface for using these mechanisms are provided.

Abstract: An apparatus for correcting and detecting multiple spotty-byte errors within a byte occurred in a limited number of bytes and which has a function capable of controlling multiple spotty-byte errors within a byte occurred in the limited number of bytes, is provided. The apparatus for correcting and detecting multiple spotty-byte errors within a byte occurred in a limited number of bytes, comprises an encoding means for generating a transmitted word based on input information data; and a decoding means for inputting the transmitted word where errors occurred in an information transmission channel as a received word and correcting and detecting the errors. The encoding means generates the transmitted word by adding check information generated based on a parity check matrix expressing a spotty-byte error control code and the input information data to the input information data.

Abstract: In order to make real time and the avoidance of risk compatible according to the contents of processing by an application, an index ID applying module applies an index computed utilizing streams before and after stream data to the stream data, computes the index again according to a stream that varies every moment, applies an index computed based upon the index of the stream data to the result of the processing of the stream data according to a predetermined procedure and outputs it. An application that receives the result of the processing and the index of the result of the processing switches processing depending upon the index.

Abstract: Voice of plural participants during a meeting is obtained and dialogue situations of the participants that change every second are displayed in real time, so that it is possible to provide a meeting visualization system for triggering more positive discussions. Voice data collected from plural voice collecting units associated with plural participants is processed by a voice processing server to extract speech information. The speech information is sequentially input to an aggregation server. A query process is performed for the speech information by a stream data processing unit of the aggregation server, so that activity data such as the accumulation value of speeches of the participants in the meeting is generated. A display processing unit visualizes and displays dialogue situations of the participants by using the sizes of circles and the thicknesses of lines on the basis of the activity data.

Abstract: Provided is an effective index processing method for a key corresponding to characteristics of a key series. The index processing method includes: holding a key tendency for representing the characteristics of the key series and a node split ratio, corresponding to the key tendency, for representing a key split ratio at the time of node split; and switching the node split ratio of an index (162) based on the key tendency. The key tendency/distribution is determined based on characteristic information of data input by a user or monitoring information acquired through monitoring of the data.

Abstract: Provided is a stream data processing method cooperable with external data in real time. By providing a stream predict cache corresponding to a hierarchical cache of relation data predicted as being a data matching target with stream data, the number of accesses to a database is reduced to improve performance. Data to be stored in the stream predict cache is determined based on a characteristic of the stream data input by a user or monitoring information obtained by monitoring the stream data.

Abstract: The reliability is improved at a low cost even in a virtualized server environment. The number of spare servers is reduced for improving the reliability and for saving a licensing fee for software on the spare servers. A server system comprises a plurality of physical servers on which a plurality of virtual servers run, a single standby server, a module for detecting an active virtual server, and a module for switching the correspondence of boot disks of virtualization modules for controlling virtual servers to the physical servers. When a physical server fails, the boot disk of the associated virtualization module is connected to a spare server to automatically activate on the spare server those virtual servers which have been active upon occurrence of the failure.