33results about How to "Avoid redundant storage" patented technology

The embodiment of the invention provides an advertisement putting method and system. The target population is preloaded in the form of categories, and advertisements are put in real time according to an index from users to categories and an index from the categories to target units. The advertisement putting method comprises the steps of creating an advertisement unit, specifying a commodity code associated with the advertisement unit, and mapping the commodity code into a category; generating a target population corresponding to the category, and pre-loading the target population of each category to the index from users to categories; generating an index from categories to advertisement units according to the commodity code associated with the advertisement unit and the category mapped by the commodity code; acquiring and analyzing user information, finding a category corresponding the user according to information acquired by analysis and the index from users to categories, then finding an advertisement unit corresponding to the category according to the index from categories to advertisement units, and playing the advertisement unit.

The present invention is applicable to the technical field of geographic information, and provides a spatial vector data indexing and query method based on HBase distributed storage. The method includes: establishing a spatial database metatable, and each record in the spatial database metatable corresponds to a spatial vector Data set table; each server node queries the space vector data set table according to the query conditions, and returns the query results to the client. The invention uses the RowKey index composed of partitions, spaces, attributes, object IDs, etc., which can effectively improve the organization of vector space data, thereby avoiding redundant storage of data; at the same time, it also customizes the partition strategy, which can automatically and evenly distribute data to each On the server node, the resource utilization rate of each node of the cluster is relatively balanced; in addition, the present invention also adopts a spatial coding method based on the XZ-Ordering idea, which can effectively solve the problem of line and area elements crossing geographic grids.

This application discloses a method for compressing and decompressing frozen electric quantity data of a smart meter, only needing to set key time point labels, adopting a difference method to avoid redundant storage of repeated data, and using carry data to process electric quantity data to further save It reduces the storage space and simplifies the complexity of the calculation process of decompression, thereby improving the reliability and search efficiency of data storage, and greatly reducing the space occupied by the data storage of electric energy meters, which solves the problem of freezing of electric energy meters in the existing storage Power data requires a large amount of storage space and access speed technical issues.

The invention relates to an interpretation conclusion compression storage method. Fields of interpretation conclusion types are set in interpretation conclusions. The interpretation conclusion compression storage method comprises the steps of judging whether the interpretation conclusion type in the current interpretation conclusion is the same as the interpretation conclusion type in the previousinterpretation conclusion or not; and when the interpretation conclusion type in the current interpretation conclusion is different from the interpretation conclusion type in the previous interpretation conclusion, storing the current interpretation conclusion. According to the interpretation conclusion compression storage method, the integrity of the interpretation conclusion is ensured; the redundant storage of a large amount of unchanged interpretation conclusions is avoided; the storage space is saved; and the subsequent processing of the interpretation conclusions is facilitated.

The embodiment of the invention provides a distributed cache method and system. The method comprises the following step: determining a first cache node according to a primary key value of metadata, and determining a second cache node according to a secondary key value of the metadatathe; and storing metadata issued by center storage node in the first cache node and storing index position of the metadata in the second cache node, wherein the index position of the metadata is used for indicating addresses of the first cache node. According to the invention, the access of the metadata can be achieved by the index position of the metadata, so that the same metadate stored in a plurality of cache nodes is avoided, thereby avoiding redundant storage of the metadata, saving storage space and ensuring the data access consistency.