摘要:
According to an aspect of an embodiment, a method comprises providing a matrix comprising m rows and n columns, each of the rows and columns comprising elements of zero and one, dividing data into n data blocks, associating each of the data blocks with each of the columns, calculating an exclusive-OR of selected data blocks in reference to one of the rows, the selected data blocks being determined by the element of one in the associated columns in the one of the rows, repeating the calculating in other rows and storing separately the calculated data resulting from the exclusive-OR of data blocks in association with the associated rows, respectively.
摘要:
According to an aspect of an embodiment, a method comprises providing a matrix comprising m rows and n columns, each of the rows and columns comprising elements of zero and one, dividing data into n data blocks, associating each of the data blocks with each of the columns, calculating an exclusive-OR of selected data blocks in reference to one of the rows, the selected data blocks being determined by the element of one in the associated columns in the one of the rows, repeating the calculating in other rows and storing separately the calculated data resulting from the exclusive-OR of data blocks in association with the associated rows, respectively.
摘要:
A data transfer method transfers data encoded with a loss correction code by using a protocol having no error correction function. The method includes acquiring a data size of transfer target data; acquiring a relationship between a code length of the loss correction code and a transfer time for the acquired data size of the transfer target data; determining an optimum code length of the loss correction code for encoding the transfer target data based on the acquired relationship between the code length and the transfer time for the acquired data size; and encoding the target data with the loss correction code having the optimum code length.
摘要:
A data transfer method transfers data encoded with a loss correction code by using a protocol having no error correction function. The method includes acquiring a data size of transfer target data; acquiring a relationship between a code length of the loss correction code and a transfer time for the acquired data size of the transfer target data; determining an optimum code length of the loss correction code for encoding the transfer target data based on the acquired relationship between the code length and the transfer time for the acquired data size; and encoding the target data with the loss correction code having the optimum code length.
摘要:
A system stores identification information for identification of a part associated with installation information for designation of a position where the part is installed in a first apparatus; receives the identification information about the part to be read and transmits it by a second apparatus; and retrieves the received identification information from the storage unit, and generates a first composite image by combining installation information corresponding to the retrieved identification information with an image of the first apparatus.
摘要:
A storage apparatus composed of a plurality of magnetic disk devices are provided. An encoding unit generates, after dividing original data, a plurality pieces of encoded data equal to or more than the number of division by use of a code of which redundancy is variable. A redundancy control unit varies the redundancy in the encoding unit in accordance with the importance of the original data. A distribution processing unit distributes and stores the plurality of encoded data to and in the plurality of magnetic disk devices. A decoding unit retrieves the encoded data corresponding to, at least, the division number of the original data from the magnetic disk devices so as to decode the original data.
摘要:
Disclosed is a system for dividing an original data into N pieces of partial data and generating L pieces of encoded data on the basis of the N pieces of partial data wherein N is a natural number greater than 1 and L is a natural number equal to or greater than N, each of the L pieces of encoded data including a header part and a operation result part, the header part including selection data identifying a subset of the N pieces of partial data on which a predetermined operation is performed, the operation result part being generated by performing the predetermined operation on partial data included in the subset identified by the selection data, wherein the L pieces of encoded data are divided into one or more transmission data groups and each of the one or more transmission data groups is transmitted to one of one or more first communication links.
摘要:
A storage apparatus composed of a plurality of magnetic disk devices are provided. An encoding unit generates, after dividing original data, a plurality pieces of encoded data equal to or more than the number of division by use of a code of which redundancy is variable. A redundancy control unit varies the redundancy in the encoding unit in accordance with the importance of the original data. A distribution processing unit distributes and stores the plurality of encoded data to and in the plurality of magnetic disk devices. A decoding unit retrieves the encoded data corresponding to, at least, the division number of the original data from the magnetic disk devices so as to decode the original data.
摘要:
The data dividing unit divides data into n pieces. An encoding unit generates m pieces of encoded data composed of a set of a bitmap matrix specifying a plurality pieces of divided data for obtaining exclusive OR (XOR) and exclusive OR data including exclusive OR of the plurality pieces of divided data specified by the bitmap matrix, wherein m is equal to or more than a dividing number n and according to redundancy. A distributed saving unit distributes and saves the m pieces of encoded data to and in storage devices at two or more locations and m or less locations. A decoding unit restores the original data by retrieving restorable k or more pieces of the encoded data among the distributed and saved m pieces of encoded data and subjecting the bitmap matrix of the retrieved encoded data to conversion into a unit matrix.
摘要:
An IP-data transmitting apparatus performs an error correction coding by classifying data into a layer indicative of the priority order of the data based on importance and vulnerability of information included in the data, and combining a plurality of data components into combination patterns. The number of the combination patterns is specified with respect to each layer with predetermined priority order.