three phase wattmeter

Two phase submission and three-phase submission understanding This paper mainly through the carding process to explain the shortcomings of 2PC, and summarize the advantages of 3PC. One, 2PC process and deadly problem As shown in the figure, the 2PC process is brief:1. The coordinator participant is in Init state and the participant waits for the message.2. The coordinator enters the prepare state to send t

JavaScript is a weak type of language relative to other languages, in other such as the Java language, the execution of a program requires a compile phase, while in JavaScript there is a similar "precompilation phase" (JavaScript is precompiled in a block of code First, there are two types of declarative methods in JavaScript, Var and function, which declare variables, and the latter declare methods. In

JavaScript is a weak type of language relative to other languages, and in other Java languages, the execution of a program requires a compile stageThere is a similar "precompilation phase" in JavaScript (JavaScript precompilation is scoped to a block of code, i.e., each code block encountered is precompiled > execution ),First, in the popular science of JavaScript in two ways of declaring, Var and function, the former declares a variable, the latter

difference to good arrangement, however, the implementation difficulty is also increased in turn. In practice, filters are used to implement Interpolation Basis Functions. Due to the symmetry of these interpolation functions, the interpolation functions can be divided into two parts: horizontal and vertical interpolation, for example, two-dimensional linear interpolation functions correspond to Bilinear interpo lation, and the three functions correspond to Bilinear interpo lation ), the sinc in

The fourth phase of the "Golden IT" Sharing and growth salon concluded, and the fourth phase The fourth phase of the "Golden IT" sharing growth salon began in the autumn rain and ended in the autumn rain. Different from the popularity of the past, this issue is only attended by three partners, which may be due to rainy days. However, the discussion is no less in

Two-phase commit Application Project (Two-phase commit protocol) 2 PC high concurrency The requirement document for the entire system is described in English.A Simple 2-Phase Commit SystemThe company ABC provides its customers wire transfer service. for example, it can withdraw $1000 from John's account in Bank of China and deposit the money to John's an

1, any one technology, is to solve a problem, there is its use of the scene.2, consider the following application scenario: A commander, a,b,c,d four generals in four directions, the commander set up a plan for the siege tomorrow. How to ensure that four generals execute siege commands at the same time?The first stage: the commander sent to the general news, plans to siege tomorrow, four generals respectively reply is ready.The second stage: The commander confirms whether the four generals are r

Phase 1: complete implementation of a simple weather forecast application (Phase 2) "Phase 1" means the first time I systematically studied Android development. This is mainly to record my learning process. PreviousPhase 1: complete implementation of a simple weather forecast application (I)After completing the core functions of the application, we need to optim

This article mainly introduces information about the "pre-compilation phase" and "execution phase" during JavaScript running, if you need javascript, you can refer to it. javascript is a weak language compared to other languages. In other languages such as java, program execution requires a compilation stage, in javascript, there is also a similar "pre-compilation stage" (the pre-Compilation of javascript i

Reprinted: http://hi.baidu.com/liuhann/item/d644cfd873c904ffcb0c39b1 Two-phase submission Protocol The key to implementing distributed transactions is the two-phase commit protocol. In this Protocol, one or more Resource Manager activities are controlled by a separate software component called the Transaction Coordinator. The five steps in this Protocol are as follows: • ApplicationProgramCall the c

Summary of the Web development phase (2) and summary of the Web development phase 1. Today's browsers are more intelligent. When the database data changes, the cache data on the web page will not be read. Use the following code to access the database: Var thePage = 'servesql. php '; MyRand = parseInt (Math. random () * 9999999999999999 ); Var theURL = thePage + "? Rand = "+ myRand; Xmlhttp. open ("GET"