icnd1 practice

LVS + keepalived practice, lvskeepalived practice 1. Install lvs on backup lvs and master LVS respectively wget http://www.linuxvirtualserver.org/software/kernel-2.6/ipvsadm-1.24.tar.gzuname -rln -s /usr/src/kernels/2.6.18-164.el5-i686/ /usr/src/linuxtar zxvf ipvsadm-1.24.tar.gzcd ipvsadm-1.24make make install Ii. Install keepalived on backup lvs and master lvs respectively. wget http://www.keepalived.org/

What is the returned value? -- Generic practice: Return Value: Generic practice For a preliminary understanding of generics, see http://blog.csdn.net/lifen0908/article/details/43450921. This blog is mainly about the application of generics in data centers.1. For example, the returned object: I use the window for querying basic student information to describe how the returned value is an entity: The first is

Python practice 2: view the encoding of a webpage. python practice Programming Environment: Virtual linux (cygwin in windows) Identify the encoding method of a webpage, Usage: python coding http: // www. ***. com Test results: Encoding of Web Page capture in python If the BeautifulSoup version is incorrect, you can use 3.03.Import urllib2From BeautifulSoup import BeautifulSoupF = urllib. urlopen (

Simple Android practice tutorial-56th guns (simulate the progress prompt box of the Meituan client), and android practice Our friends who have used the Meituan client know that the loading wait prompt of Meituan is very interesting and is displayed as an animation. Next we will understand the principles behind it, and then implement your own waiting animation effect. First, we prepare two images: The two i

Factory model-practice details-practice Details Factory model:There are a lot of explanations. Here I will explain what I understand in combination to everyone: the company has such a requirement that LBS positioning should be used in the App to implement certain functions. There are a lot of product Technologies Beginning with requirements and technical validation sessions. When we discuss whether to use B

HTML5APP practice (1): neural cats (2) and html5app practice Previous articles analyzed the "contingency" of neural cat games. This article mainly introduces how to design and develop the entire game through Gamebuilder + CanTk. 1. Create a project to delete the balls and lawns in the scenario, place the background image, and move the square with the cat: Here, the background image and the circle moved by

Data Structure practice-sequence table application and data structure practice Sequence [Project-sequence table application]Define a linear table with sequential structure storage. design the algorithm to complete the following work:1. Delete all elements between [x, y]. The time complexity of the algorithm is O (n) and the space complexity is O (1 );2. Moving the odd number to the front of all even number

Summary of the First practice of Android property animation and the first practice of android After these two days of learning about ObjectAnimator property animation, I have a certain understanding of the property animation provided by Android. Now I will summarize the effect of opening a similar slice. : Next let's use the property animation effect we just learned to achieve the above effect. First, we n

Python data visualization programming practice-import data, python practice 1. import data from a csv file Principle: The with statement opens the file and binds it to object f. You don't have to worry about shutting down data files after operating the resources. The with context manager will help you. Then, the csv. reader () method returns the reader object, which traverses all rows of the read file. 1

Frontend practice summary and practice summary1. Front-end basic box model location (relatively absolute) browser rendering Order (from top down, from outside to inside; if there is width inside, then from inside, if the div does not set the width, it will keep up until the div with the configured width) floating 2. The basic layout is fixed in the middle and adaptive on both sides (that is, the center is l

Path to mathematics-python computing practice (16)-machine vision-filter noise reduction (neighborhood average method filtering)-python practice #-*-Coding: UTF-8-*-# code: myhaspl@myhaspl.com # neighborhood filtering with a radius of 2 import cv2import numpy as npfn = "test3.jpg" myimg = cv2.imread (fn) img = cv2.cvtColor (myimg, cv2.COLOR _ BGR2GRAY) # Add salt and pepper noise param = 20 # grayscale ran

Path to mathematics-python computing practice (11)-machine vision-Image Enhancement-python practice In the computer field, Gray scale digital images are images with only one sampling color per pixel. This type of image is usually displayed as a gray scale from the shortest black to the brightest white, although theoretically this sample can be of different colors or even different colors on different bright

Today, our group convened a group meeting, the theme is to determine the Web Test practice team to test and comparative analysis of the software, and then the task Division. our team to test the software is the blog park, the choice of comparative analysis software is csdn. Meeting time: 2017.12.27Venue: East Nine floor corridor study areaAttendees: Lu Huimin, Ning Li, Zhangjiang, Wang Rui, lijiaming.After discussion, we have done the following divisi

First, homework (exercise) content:1, elaborated the Linux HA cluster use background;2. Summarize the system composition of Linux ha cluster and the working model of HA cluster;3, through the lamp combination, based on heartbeat V2 CRM implementation ha; requirements, deployment wordpress, any data used in the edited article can be accessed normally after the node is switched;Second, completion time:Before October 24, 2015.Third, the way of submission:Please submit your job's post link address i

my github Address: Https://github.com/CNhoward/Accerlerated-C-plus-plus10-0. Compile, execute, and test the programs in this chapter.Ans: See GitHub.10-1. Rewrite the student-grading program from§9.6/166 to generate letter grades.Ans: See GitHub.10-2. Rewrite the median function from§8.1.1/140 So, we can call it with either a vector or a built-in array. The function should allow containers of any arithmetic type.Ans: See GitHub.10-3. Write a test program to verify that the median function opera

encountered, what needs help), to solve the problem of teamwork. Scrum advocates the idea of self-organization, promotes the self-management of the team, and the daily station is a very important practical form of the team's autonomous state synchronization, risk management, and decision-making. The team will understand the overall status through the station and make collective decisions about the risks and problems exposed. A well-organized station is the result of a team's self-organizing nee

Tags: es2017 paste efficiency doc share INI image technology share DirectData volume, 13 million of tables plus 1.12 million of tablesNote: This article is only part of the optimization, not comprehensive, for reference only, welcome guidance.Please take a look at Tim to see, because when writing in Tim, paste over there is a problem, directly on the link.Https://823948977.docs.qq.com/T5e6dBYLoZz?opendocxfrom=timThe article is similar in content:MySQL Tens data query efficiency

) {System.out.println ("Driver load Failed"); E.printstacktrace (); }//2 connect String URL = "Jdbc:mysql://localhost/test?use analysis: Ssl=true"; String user = "root"; String password = "root"; try {con = drivermanager.getconnection (url, user, password); System.out.println ("link succeeded"); } catch (SQLException e) {System.out.println ("link failed"); E.printstacktrace (); }//3 Statement object try {sql = con.creates

CodeSmith template code generation practice Details, codesmith practicePreface Company projects are developed based on soa-oriented architecture ideas. It is inevitable to break down many sub-projects. However, if there are too many shelf structures for the subitem, it will produce a pot of porridge for later development and maintenance. To avoid such confusion at the structural layer as much as possible, we made a decision to use a unified shelf stru

Understanding and practice of GCD, and GCD understanding and practiceGCD GCD, full Grand Central Dispatch, is a solution developed by Apple for multi-core parallel processing. It is implemented in C language, but it is very convenient to use because block is used to process callback. In addition, GCD automatically manages the thread lifecycle, which does not need to be managed.Tasks and queues GCD has two important concepts: task and queue. 1. tasks a