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Jessica Qiu

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Top Stories by Jessica Qiu

Recently a development team met some difficulties in data source computation when developing iReport reports. After the use of esProc for cross database computation, the problem is resolved. This is a project payment progress report, as part of a project management system. It's based on an Oracle database. The reports needs to present the project name, payment amount, contract value, payment progress (in percentage), and name of the project manager, etc., for all ongoing projects. Amount these the first 3 items contributes to the difficulties met by the development team. Note that the project payment record is stored in accounting system, rather than the Oracle database used by the development team. The accounting system is built on MSSQL database. The contract value information is also stored in a separate MSSQL database, used by contract management system. After a... (more)

An Alternative to Stored Procedure in Big Data Computation

As we know, the stored procedure is designed to handle computations involving complex business logics. In the past, the data structure and business logics were so simple that one SQL statement was enough to achieve user's computational goal. With the rapid growing of information industry, users frequently find that they need to achieve the increasingly complex computational goals to out-perform their competitors. To address such computations, SQL alone is far from enough. Database programmers have the additional demands regarding the judge and loop statements, branches at multip... (more)

Data Environments Support of esProc Makes Statistical Computing More Flexible

Enterprises always have various data sources, for instance, CRM system may use SQL Server, sales reports adopt Excel, ERP applies Oracle database. When it comes to actual business analysis, enterprises usually need to conduct interactive computation, including filter, group, etc among various data environments. But data Interaction between multiple data sources are not easy to realize with some traditional statistical computing tools. In order to solve such kind of problems, esProc which adapts to various data environments comes into being. Support of various data sources is an... (more)

Be Aware of a Java Development Tool for Data Computing

In the process of development with Java, we will occasionally encounter the computation similar to data processing in database. For instance, there are two frequently updated Excel sheets, which are the clients' information and the orders. We need to query the data of clients who have bought all the products on the list through entering a dynamic product list. The "computation similar to data processing in database" refers to structured data computation of an application without database. Although Java is capable of handling such computation, the procedure is very cumbersome and v... (more)

Realize Memory Computation in Hadoop

The low efficiency of Hadoop computation is an undeniable truth. We believe, one of the major reasons is that the underlying computational structure of MapReduce for Hadoop is basically of the external memory computation. The external memory computation implements the data exchange through the frequent external memory read/write. Because the efficiency of file I/O is two orders of magnitude lower than that of memory, the computational performance of Hadoop is unlikely high. While for the normal users, they usually have a small size of cluster with only tens or scores of nodes. T... (more)