International Business Machines Corporation

Tsinghua University

Beijing Hua Chuang Hong Li Energy Technologies Ltd.

Xi Long Zheng

Xiao Li

Hong Min

Serge Bourbonnais

Ke Wei Wei

Gong Su

Wentao Zhu

Xinping Qiu

Jie An

Nan Jiang

Zhen Hua Dong

En Zhong Wang

An integrated data processing system with two-tier data caching system and techniques for use thereof in a hybrid RDBMS and BDS computing environment are provided. In one aspect, the system is RDBMS-centric and uses two caches, one on the RDBMS side (1st tier) and the other on the BDS side (2nd tier). In another aspect, a DRDA wrapper on the BDS side enables the RDBMS to communicate with the BDS as if the BDS is another RDBMS. This is advantageous because the RDBMS already supports the DRDA protocol standard. In yet another aspect, the DRDA wrapper performs the data transformation needed when transferring cached objects between the RDBMS cache and BDS cache because RDBMS and BDS save data objects in different formats. This is advantageous because it offloads the computation from RDBMS to BDS therefore reducing the performance impact on RDBMS for its normal query and transaction processing.

Data caching in hybrid data processing and integration environment

A system for transferring data from a Relational Database Management System ('RDBMS') to a big data platform and methods for making and using the same. The system can acquire a partitioning execution scheme of a selected table from the RDBMS and submitting partitioned queries from the big data platform to each mapper of partitions. The partitioned queries are generated based on the partitioning execution scheme. The partitioning execution scheme can be acquired by submitting a query explain request to an optimizer of the RDBMS to generating a parallel query plan. The partitioning execution scheme can also be acquired by querying statistics from a statistics catalog of the RDBMS or by user inputs. The system can use RDBMS capabilities and statistics for parallel data fetching. Thereby, the system can increase efficiency of the fetching and can avoid straggling when target data is not evenly distributed and can avoid table query-in-serial.

System and method for transferring data between RDBMS and big data platform

An assembled battery with a high capacity, comprising a plurality of unit cells electrically connected with one another in parallel, the unit cells each having a through-hole and being of toroidal shape, and the plurality of unit cells are arranged in a nested manner such that one unit cell is disposed within another unit cell. The problem that toroidal batteries with high capacity, high power density and small thickness may have a large volume and low energy density is solved by connecting in parallel a plurality of unit cells nested within one another, and heat dissipation of the battery is also further improved. A toroidal cell having heat dissipating fins is also provided.

Assembled battery and toroidal cell used in the same

A method for producing an assembled battery, comprising the following steps: (a) producing a plurality of unit cells; (b) arranging the plurality of unit cells in a nested manner such that one unit cell is disposed within another unit cell; and (c) electrically connecting the plurality of unit cells with one another in parallel or in series. The problem that toroidal batteries with high capacity, high power density and small thickness may have a large volume and low energy density is solved by connecting in parallel a plurality of unit cells nested within one another, and heat dissipation of the battery is also further improved. An assembled battery produced by the method is also provided.

Method for producing assembled battery and assembled battery

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Beijing, China

Xi Long Zheng