smoked carp

Transferred from: http://blog.csdn.net/cywosp/article/details/23397179 A distributed hash (DHT) implementation algorithm, proposed by MIT in 1997, was designed to address hot spot problems in the Internet, with a similar intent to carp. The consistent hash corrects the problem caused by the simple hashing algorithm used by carp, so that distributed hashing (DHT) can be really applied in the peer-to-peer env

Reference Net::zookeeper This package, may be reported this errorCan ' t load '/usr/local/lib64/perl5/auto/net/zookeeper/zookeeper.so ' for module Net::zookeeper:/usr/local/lib64/perl5/auto/net/zookeeper/zookeeper.so:undefined symbol:zoo_perm_create at/usr/lib64/perl5/xsloader.pm Line 70. AT/USR/LOCAL/LIB64/PERL5/NET/ZOOKEEPER.PM Line 109.View the 70 lines of XSLOADER.PM:My $libref = dl_load_file ($file, 0) or do {require Carp;

At noon yesterday, I helped the carp to transfer database servers to a large group buying website. This article was supposed to be summarized after the transfer was completed yesterday. However, due to some reasons, I did not write it out in time. Now I want to make it up.First, the environment is like this. in mysql 5.0, The centos system of the old database server has no web, no ftp, and the new database server mysql5.1 centos nginx.The first idea o

I. Background of the problem When you use distributed data storage, you often encounter the need to add new nodes to meet the rapidly growing business needs. However, when a new node is added, it can be catastrophic for some systems if poorly handled results in all data re-sharding .Is there a viable way to migrate only the nodes associated with the data when it is re-fragmented, rather than migrating the entire data? Of course, in this case we can use a consistent hash to deal with.Second, the

A distributed hash (DHT) implementation algorithm, proposed by MIT in 1997, was designed to address hot spot problems in the Internet, with a similar intent to carp. The consistent hash corrects the problem caused by the simple hashing algorithm used by carp, so that distributed hashing (DHT) can be really applied in the peer-to-peer environment.The consistency hash algorithm proposes four definitions for d

dependent on abstraction;(2) to program for the interface, do not program for implementation.If the principle of opening is the goal, reliance on the reversal principle is the means to reach the "open and close" principle. If you want to achieve the best "open and close" principle, we should try to comply with the principle of dependency reversal. It can be said that reliance on the reverse principle is the "abstraction" of the best specification!! I personally feel that reliance on the reversa

The consistent hashing algorithm was proposed in 1997 by the MIT Karger and others in the solution of the distributed cache, designed to address hot spot issues in the Internet, with the original intent and carp very similar. The consistent hash corrects the problem caused by the simple hashing algorithm used by carp, so that DHT can actually be applied in the peer-to-peer environment.But now the consistent

is obtained. Many of its theories and models are based on the constraints of operational research and other related disciplines, such as linear programming, restraint theory and artificial intelligence. The main algorithms used are optimization algorithm, precise algorithm and heuristic algorithm. It can pull all the material from the terminal of the supply chain according to the order request (the guest's order), instead of just the demand list as in Mrp/erp.For example, a regular guest a firs

Today, the company organized a small discussion about the OO principles and models :) Compared with the previous Ajax explanation, this time I relaxed a lot ,! Good thing! There is a lot less time to prepare, basically in addition to preparing PPT, nothing else to read. Just a simple list of some outline things: Bytes Mode: gof Bytes Framework :《 Design Mode " The framework is defined A group of collaborative classes , Specific software The framework constitutes Reusabl

the client program should not be forced to rely on methods that they do not need to use. Its English abbreviation is ISP, English full name is interface segregation Principle. in fact, the interface separation principle means: an interface does not need to provide too much behavior, an interface should only provide an external function, should not be all operations are encapsulated in an interface. 6. Dimitri Principles (LOD) The core idea of the Dimitri principle is that one object should kno

A distributed hash (DHT) implementation algorithm, proposed by MIT in 1997, was designed to address hot spot problems in the Internet, with a similar intent to carp. The consistent hash corrects the problem caused by the simple hashing algorithm used by carp, so that distributed hashing (DHT) can be really applied in the peer-to-peer environment. The consistency hash algorithm proposes four definitions for

. For example, if you have adjusted the kernel parameters, you must run it again. /configure to make the new settings take effect. You need to re-run the configure script before using the make command to re-compile the script. There are two methods: first, run the following command: config. status -- recheck; the second is to use the command touch config. status, which updates the timestamp of the file. Note: If you want to add or delete the./configure option, you must re-enter the complete comm

stop the electricity. As a result, he said that the electricity was supplied to two fish ponds and he had to be careful. Someone sitting in the middle of the fish pond has already begun to catch a hacker. We still get nothing here, a little depressed. It's almost and it's just getting started. My dad's hook ran a crucian carp, marking that the water wasn't without fish. Then the tragedy began to get connected, first, an uncle's fishing wire fell off

squatted at the door of the anguosi and wrapped the dazzling white silk around my forehead, Chen Dong appeared. When he saw me, he also saw the white paper behind me: "selling as a dead mother "."What is your name ?" He stood in front of me and looked gentle.I slowly raised my head and looked straight at him: "It looks like duckweed, and there is no surname .""Duckweed? You should not be the one who is on the move. At least you should swim like a fish in the water .""Fish? The little girl has h

bait: but the younger brother has no bones to climb fast, and it will not become a butterfly. What should he do without carrying this hard and heavy shell? Mom: Because will drill Earth and the earth will protect him. Little snail bait cried: We are so poor, the sky is not protected, and the Earth is not protected. Snail mother comforted him: "That's why we have shells !」 We don't rely on the sky or the land. We rely on ourselves. 3. Sharks and fish Someone once tried to put the most ferociou

the younger brother has no bones to climb fast, and it will not become a butterfly. What should he do without carrying this hard and heavy shell?Mom: Because will drill Earth and the earth will protect him.Little snail bait cried: We are so poor, the sky is not protected, and the Earth is not protected.Snail mother comforted him: So we have shell! We don't rely on the sky or the land. We rely on ourselves.3. Sharks and fishSomeone once tried to put the most ferocious shark and a group of tropic

Demeter (or the short-cut-level) is also called the least knowledge principle (least knowledge principle or LKP). If the two classes do not communicate with each other directly, then these two classes should not have a direct interaction. If one class needs to call a method of another class, it can be forwarded by a third party. The premise of the dimit rule is that in the structure design of the class, each class should minimize the access permissions of members. The fundamental idea of the di

design depends on details, which is poor because the policy is affected by changes in details. The dependency inversion principle makes the details and policies depend on abstraction. The stability of abstraction determines the stability of the system. Iv. Interface isolation principle (ISP) Interface segregation principle: it is better to use multiple special interfaces than to use a single total interface. In other words, from the perspective of a customer class: the dependence of a class

bait: but the younger brother has no bones to climb fast, and it will not become a butterfly. What should he do without carrying this hard and heavy shell?Mom: Because will drill Earth and the earth will protect him.Little snail bait cried: We are so poor, the sky is not protected, and the Earth is not protected.Snail mother comforted him: "That's why we have shells !」 We don't rely on the sky or the land. We rely on ourselves. 3. Sharks and fish Someone once tried to put the most ferocio

* maintainability and reusability are not exactly the same. The following principles can be used to increase the maintainability of a program: 1. "open-closed" principle (OCP) the principle of open-closed principle is that a software entity should be open to extensions and closed to modifications. Ii. LSP liskov substitution principle: Subtypes must be able to replace their base types. Iii ,? Dependency inversion principle (DIP) iv ,? Interface isolation principle (ISP) 5 ,? Synthesis/aggregati