beautiful chubby

Author: Liu Xuhui Raymond reprinted. Please indicate the source Email: colorant at 163.com Blog: http://blog.csdn.net/colorant/ More paper Reading Note http://blog.csdn.net/colorant/article/details/8256145 Keywords Chubby, paxos,Distributed Lock Service =Target question = Provides a coarse-grained lock service for distributed systems and small-capacity file storage services. =Core Idea = The paxos logic solution is provided in the form of servic

Reference:Zookeeper Consistency protocol: ZabThe principle of chubbyzookeeper and its application in distributed environmentPaxos vs. viewstamped Replication vs. ZabZab vs. PaxosZab:high-performance Broadcast for Primary-backup systemsChubby: Locking service for loosely coupled distributed systemsUnderstanding of Chubby and zookeeperThe zookeeper selection process uses Paxos, which uses Zab (Zookeeper Atom Broadcast) for data replication.Zab is the ma

Then I wrote something that was not written yesterday. Recently, I received a mail about the elderly. The elderly living alone, living alone, or being sent to the nursing home, were so sad. Coincidentally, chestnuts criticized me last week and said, "Let me go home and see more. He is different from me. Otherwise, he will go back every week. I usually don't pay much attention to what he says, but he can always come up with something unexpected to me from time to time. Think about it too. Why do

";$submit _vars["LoginMode"] = "normal";$submit _vars["Styleid"] = "1";$submit _vars["cookietime"] = "315360000";$submit _vars["Loginfield"] = "username";$submit _vars["username"] = "********"; Your user name$submit _vars["password"] = "*******"; Your password.$submit _vars["QuestionID"] = "0";$submit _vars["answer"] = "";$submit _vars["loginsubmit"] = "submit";$snoopy->submit ($submit _url, $submit _vars);Print $snoopy->results;?> The above describes the red

is to get it through the constant () function. To determine if a constant is already defined, you can use the defined (Stringname) function to return true successfully, otherwise false. 1.3 Defining variables and assigning values to variablesUnlike many languages, it is not necessary to declare a variable before using it in PHP (PHP4.0 needs to declare a variable before), just assign a value to the variable.1.4 operatorOperators, like other languages, include +-*/() | ^ ~ 1.5 Functionsfunction

satisfies the 1th to the X answer,But there is no sequence that satisfies the 1th to x+1 answer. If all the answers are okay, you outputThe number of all answers.Input:1051 2 Even3 4 Odd5 6 Even1 6 Even7 OddOutput3Idea: l R even is equivalent to the sequence parity of 0-L-1 and 0-r. Odd equivalent for odd pages is the opposite of parity. When X is hashed, its position in the hash array represents its hash value.#include #includeusing namespacestd;Const intMod=1000007;intHash[mod];intPar[mod+MOD

When the test is on the real machine, it appears for example the following information, and the application hangs.Restore the connection to "" XXX "for IPod" and run "xxx" again, or if "xxx" is still running, you can attach to it by selecti ng Debug > Attach to Process > XXX.This is because the application suddenly consumes a lot of memory, and then allocates the scheduling memory, an error occurs, causing the system to shut down the app process.Be able to see if it's loaded with lots of picture

Tags: IMA personal configuration 0.12 data type ESC definition Cap tabLike statements and wildcard charactersINSERT into teacher_1 values (' chubby ', ' male ', 18),(' xiaoming ', ' male ', 19),(' Zhang San ', ' Male ', 30),(' John Doe ', ' Male ', 27),(' spanned ', ' male ', 21),(' Three fat ', ' female ', 31),(' Zhang Sanfeng ', ' Male ', 66),(' Zhang ', ' Male ', 11),(' King _ White ', ' male ', 14),(' Wang Dabai ', ' male ', 19);Demand one: Find o

P1111 small Fat Fruit Accepted Tags: chubby series [show label]DescribeXuzhenyi to the Datong fruit shop to buy fruit, but the boss Huyichen told him to buy one at a time, but Xuzhenyi want to eat two, so in the bargain, Huyichen said as long as Xuzhenyi can make the two fruits he wants to merge into one, can succeed. Can you help him?Format input FormatThe input file contains two fruit names to be combined. All names have a maximum of 100 letters. (w

First, a simple understanding, and then add: To solve the consistency problem of hadoop distributed systems, many people have proposed many protocols, including the paxos algorithm (proposed by latex, algorithms need to be learned ), However, Chubby is not an algorithm or protocol. It is a service and a lock service. The implementation of this service is a distributed file system. Why not use protocol? In addition to implementing consistency, this s

number greater than proposal K, Assumed to be proposal K2. Similarly, the value of proposal K2 is equal to the value of proposal K or proposal K3, and KAs we can see, the P2C condition is basically the key point of the above two-phase protocol 1, but there is a problem, this p2c condition requires to find out this "maximum ordinal value" and the proposed proposal must be an atomic operation , which is actually difficult to achieve, so, The two-phase protocol is a clever way to avoid this proble

Normal 0 7.8 磅 0 2 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable{mso-style-name:普通表格;mso-tstyle-rowband-size:0;mso-tstyle-colband-size:0;mso-style-noshow:yes;mso-style-parent:"";mso-padding-alt:0cm 5.4pt 0cm 5.4pt;mso-para-margin:0cm;mso-para-margin-bottom:.0001pt;mso-pagination:widow-orphan;font-size:10.0pt;font-family:"Times New Roman";mso-ansi-language:#0400;mso-fareast-language:#0400;mso-b

interface scaling https://github.com/finscn/scaler.js A canvas-based UI class library that is developing the perfect HTTPS ://github.com/finscn/cui.js command-line tool to generate an IPA icon https://github.com/finscn/icreator picture bulk trim and pack command-line tools HTTPS ://github.com/finscn/ipacker a HTML5 game frame with a symbolic meaning much larger than the practical value https://github.com/finscn/The-Best-JS-Game-Framework A great iOS project, based on the simulated browser of t

Today, when naming the properties of a class, using NewValue, give an error: property's synthesized getter follows Cocoa naming convention for returning ' owned ' objects, a depressed do not know what happened, and later checked the information, the original is the naming standard things:You own any object you createYou create an object using a method whose name begins with "Alloc", "new", "Copy", or "mutablecopy" (for example, alloc , c2/>, or mutableCopy ).Be sure to pay attention to the namin

When you test on a real machine, the following information appears, and the app hangs. Restore the connection to "" XXX "for IPod" and run "xxx" again, or if "xxx" is still running, you can attach to it by selecti ng Debug > Attach to Process > XXX.This is because the application suddenly consumes a lot of memory, and then allocates the scheduling memory, an error occurs, causing the system to shut down the app process.You can check to see if a lot of pictures are loaded, and so on, or where the

) Touchesshouldcancelincontentview: (UIView *) view is to send tracking before, first function this method.At the end of the ScrollView initialization, there are several properties to be set:No send scrolling notifications but even if the fingers move scroll will not move. YES Send notification scroll can move [Myscrollview Setcancancelcontenttouches:yes]; [Myscrollview Setbounces:no]; NO immediately notify TouchesShouldBegin:withEvent:inContentView to see if rolling scroll [Mysc

Upgrade Xcode6 after the direct establishment of the empty project found that this is too pit, really is nothing ah. There's only one way to change.summarized as follows:1. Create a single view application 2. Open Info.plist (Don't tell me where to find info.plist), delete the Launch Screen interface file base name and Main Main Storyboard file base name3. Delete Main.storyboard and Launchscreen.xib4. Modify APPDELEGATE.M5. Then run the program and find that the program interface on the ipho

quotation marks ("), and delimiters ( If you need to use a swivel chair character, use single quotation marks to escape only single quotes "'", when using double quotation marks, there is a lot to be aware of escaping, usually using backslashes \ to escape. 1.1.3 Integer integerThe integral type does not have to say more, look at the code: 1.1.4 floating point type floating-point data types can be used to store numbers or to hold decimals, and in previous versions of PHP4.0, floating-point ma

(History, '%y year%m%d ') from employee;Select History, Date_format (History, '%d ') from employee;Select History, Date_format (History, '%y%m month%d%h%i minutes%s seconds ') from employee;8: Calculate the day of the weekSelect History, Dayname (history) from employee;9: Chinese Date string conversion date str_to_date ()INSERT into employee values (11, ' Zhang Fei ', ' Male ', 22, 3000, ' February 01, 2017 '); --ErrorINSERT into employee values (11, ' Zhang Fei ', ' Male ', ', ', ' str_to_date

in the future, please You can use MYSQLI or PDO instead. Workaround 1:Prohibit PHP errorDisplay_errors = on change to display_errors = OffSince this server is for users, sometimes they need to make an error (...). Are for friends, ^_^), can not do this, let them change the procedure, see the second program.Workaround 2:Common PHP syntax to connect MySQL is as followsMySQL is commonly used to build table SQL as followsWorkaround Three:Set the alarm level in the PHP program codeError_reporting (e