script pipeline

This is a creation in Article, where the information may have evolved or changed. Golang is proven to be ideal for concurrent programming, and goroutine is more readable, elegant, and efficient than asynchronous programming. This paper presents a pipeline execution model for Golang implementation, which is suitable for batch processing of large amount of data (ETL) scenarios. Imagine an application scenario like this:(1) Load user reviews from databas

A pipeline is one-way, first-out, which connects the output of one process with the input of another. One process (write process) writes data at the end of the pipeline, and another process (read process) reads the data from the head of the pipe. Once the data is read by a process, it will be removed from the pipeline and other read processes will no longer be ab

The implementation principle of this projectsevice only sends data to the pipeline (the data pool), waits for the data in the pool, and it automatically comes to you. You don't have to care about how data is sent and received, just focus on the processing of your business. asAdvantages:The pipeline-based implementation is that the message is sent or received only to be sent to the

Please respect the fruits of labor, reproduced please specify the source: http://blog.csdn.net/caoshichao520326/article/details/8995583 Java Multithreading to exchange information, sometimes only pipe to complete, in the use of pipe communication, often encounter "Java-ioexception:read end Dead" or "Java-ioexception:write-end dead" anomaly, The following for this problem to make a simple analysis, the first is to write a pipeline communication demo fo

Tags: minimum map collect no introduction Learn method Default PriceLearn MongoDB 11: MongoDB Aggregation (Aggregation Pipeline Basics) (iii)June 09, 2016 10:47:10Hits: 15320I. INTRODUCTION of Aggregate db.collection.aggregate()是基于数据处理的聚合管道，每个文档通过一个由多个阶段（stage）组成的管道，可以对每个阶段的管道进行分组、过滤等功能，然后经过一系列的处理，输出相应的结果。 图来自https://docs.mongodb.com/manual/aggregation/ 官方网 我们通过这张图，可以清晰的了解Aggregate处理的过程 1、db.collection.aggregate()可以多个管道，能方便的进行数据的处理

Pipe pipeline application. A friend of linux must know the pipe (pipeline) function provided by shell. maybe you do not know his full name yet. you have never used the following command: catINSTALL | more commands of this type. a linux user must know the pipe (pipeline) function provided by shell. maybe you do not know its full name, you have never used such a co

Chemical Pipeline Simulation Technology Pipelinestudio v3.4.0.0 Final-iso 1CD stable versionPipelinestudio (Pipeline Studio) is also a highly acclaimed operator training resource. They do not have to enter the control room to observe the hydraulic effects of operating changes in the offline environment. They can learn how to predict the results of different operations running on the pipe, thereby comprehens

IIS 7.0 supports two types of pipe modes:(1) IIS 7.0 provides the latest integrated pipeline mode (Integrated),(2) Classic pipe mode, classic pipe mode is provided by the previous version of IIS.We can set the pipeline mode through the application pool, which is especially useful for IIS administrators because it allows one server to run only one mode, or two modes to run on a single server at the same time

[Java iO] _ pipeline stream notes Objectives of this chapter:Understanding the use of thread communication streams (pipeline streams) Pipeline Flow The main function of a pipeline stream is to communicate between two threads, namely, pipedoutputstream and pipedinputstream. If you want to output a

In Linux),), (, (redirection and pipeline commands 1 redirection 1.1 redirection symbols> The output is redirected to a file or device to overwrite the original file.>! The output is redirected to a file or device to forcibly overwrite the original file.> The output is redirected to a file or device to append the original file.1.2 standard error redirection symbols2> redirect a standard error output to a file or device to overwrite the original file B

An overview:1. A pipe function is a function that can return a rowset (which can make a nested table nested table or array varray), and we can query it like a physical table orassigns a value to the collection variable. 2, the pipeline function for the parallel execution, in the ordinary function uses the Dbms_output output information, needs to return to the client once after the server executes the entire function. If you want the clientSome of the

Project Background Shaoxing county is the first pilot city of Digital Urban Management in Zhejiang Province and the first county-level city in China. As the economy develops rapidly, the pace of urbanization accelerates, and the scale of the city expands and the degree of modernization continues to increase, the underground pipelines of the city, as an important urban infrastructure, are becoming increasingly large and intensive, the types of pipelines are becoming more and more complex. The pi

module's granularity, and each module can be reused, which is greatly enhanced by reusability. This pattern is the pipeline pattern to be discussed in this section.As the name implies, the pipeline mode is like a pipe to connect multiple objects, the overall look like a number of valves nested in the pipeline, and the processing logic placed on the valve, such a

I. Concept: interprocess communication ( IPC,interprocess communication) Each process has a different user address space, and the global variables of any process are not visible in the other process, so the exchange of data between cities must pass through the kernel,In the kernel to open a buffer process 1 data from the user space copied to the kernel buffer, process 2 and then read the data from the kernel buffer, the mechanism provided by the system becomes inter-process Communication (IPC,in

Since the project was migrated from Aix to Redhat system, a previously written shell script did not run successfully, and after analysis, the key code was locked as follows:readfilecontent () {Currentfile=$1fileshowrows=0filerealrows=0filebusinessdate=$2Filecountstarttime=0Filecountendtime=0 Echo$1 Echo$2 Cat$1| whileRead Line Do if["$fileRealRows"-eq"0" ] Then Echo "$line"fileshowrows=`Echo$line |awk '{split ($0,a, "|"); P