Ebay, Incorporated

China Petroleum Chemical Corporation

Research Institute of Petroleum Processing, Sinopec

Sun-Central (Shanghai) Marketing and Service Co., Ltd

Tan Chen

Fei Li

Hao Chen

Yong Zhang

Lishun Dai

Zhihai Hu

Chuanfeng Niu

Yong Han

Wei Ye

Libin Sun

Qiang Fang

Lingping Wang

Zhonghuo Deng

Zhicai Shao

Shasha Li

Wenjing Xu

Fa Liu

Jinshan Xiao

The present invention provides an oil slurry filter, a filter unit including the oil slurry filter, a multiple-filter system including the oil slurry filter, and a multiple-stage filter system including the oil slurry filter. Due to the use of the filter component of flexible texture in the oil slurry filter of the present invention, the problems that the filter material is easily blocked by high-viscosity colloidal impurities, the regeneration efficiency of the filter is poor and the filtration efficiency is low are solved, and it is possible to make the backwash treatment of the filter residue more convenient and improve the regeneration efficiency of the filter. The present invention also provides a filtering process using the oil slurry filter to ensure long-term stable operation of the oil slurry filtering process.

Oil slurry filter, oil slurry filter unit and oil slurry filter system containing the same, and oil slurry filtering process

A system and method for identifying whether data skew is causing delays in a map phase and/or a reduce phase of a query of a distributed database. The system and method identify the values of various metrics relating to a database query. These metrics include map phase and reduce phase durations and various related metrics. The system and method gather statistics of multiple queries to determine correlation levels between the metrics and the map phase and reduce phase durations. Based on the statistics, the system and method determine whether one or both of the map and reduce phases for a query/response are taking longer than expected. If the durations are longer than expected, the system identifies the delay as caused by data skew and informs the originator of the query.

Distributed database job data skew detection

Growing community of inventors

Shanghai, China

Tan Chen