d sub interface

Last month before interviewing a company, the idea of MySQL sub-table, then briefly said the next hash algorithm sub-table, as well as the idea of discuz sub-table,But for the new data self-ID storage of the design idea is not very good answer (the test + interview the whole process is OK, because with the personal expectations of the salary is not ideal and relu

Label:Why do you want to divide tables First of all to know what the situation, only need to divide the table of individuals feel that the number of single-table records to the million to tens to use the sub-table, the purpose of the table is this, reduce the burden of the database, shorten the query time. There are two ways of table partitioning: 1 Horizontal split: Places data rows into two separate tables based on the values of one or more columns

Sub-Library sub-table applicable scenarios The Library sub-table is used to address the two common scenarios of the current Internet-large data volumes and high concurrency. It is usually divided into two types: vertical split and horizontal split. Vertical splitting is the splitting of a library (table) into multiple libraries (tables) based on the business. Fo

Tags: architecture highlights now Mushroom Street STR Global zone avoid technology sharingObjective The company recently engaged in service separation, data segmentation, because the amount of data on a single sheet is too large, and also in the amount of 60W per day growth. Before I learned the database of the sub-list, read a few blog posts, but only know a vague concept, and now in retrospect, what is vague. Today, I looked at the database

MySQL Database sub-Library sub-table scheme, once the database is too large, especially when the write is too frequent, very difficult to be supported by a host, we will still face the expansion bottleneck. At this point, we have to find other technical means to solve this bottleneck, that is, this chapter is to introduce the bad data segmentation technology. MySQL Database slicing Objective Extensions th

The traditional sub-database sub-tableThe traditional sub-database is implemented by Application layer logic, which is common tables and libraries for the database level.Sub-LibraryWhy the library is dividedFirst, in the case of a single database server with sufficient performance, the library has no effect on database performance. Database has only one namespace

Maximum sub-sequence and algorithm analysis, sub-sequence algorithm analysis Problem Description: Given n integer sequence {a1,a2,..., an}, function f (i,j) =max{0,σak} (k: Continuous from I to j); The problem is the maximum value of the continuous sub-columns, if the maximum is negative, take 0, such as 8 number sequence { -1,2,-3,4,-2,5, -8,3}, the maximum sub

In. in the discuz project of net, the background management module is discuze. web. admin is a separate module. However, the folder for opening the solution cannot find the folder for separate modules, but is stored in discuz. in the admin folder of the web project. After analysis, the original administrator module is a sub-website, just to build the website in the discuz. web folder, and finally, include the discuz. Web project. What are the advant

Problem description: An array with a length of N. the array elements have positive values, such as {-1, 4, 6,-3, 7,-3,-3, 9 }; we can clearly know that the largest sub-array should be 4 to 9, that is, subscript 1 to subscript 7, and the sum is 17.Solution: the first method: We can use Definition 1 and two numbers ThisSum and MaxSum to record the sum of the current array and the largest sum of the array. 2. We can use two for loops to traverse the arra

When designing the parent object, you will encounter the situation where the parameter of the object method is the class itself, and then the sub-object will implement this method, for example, compare whether the object is equal. In this scenario, it is usually designed to write the following example, first performing transformation and comparison in the sub-object. This is a design that can work normally

Library single TableLibrary single table is the most common database design, for example, there is a user table in database db , all users can be in the db library User found in the table. Library Multi-tableAs the number of users increases, the amount of data in the user table becomes larger, and when the amount of data reaches a certain level , the query to the user table slowly slows down, affecting the entire DB the performance. If you use MySQL, A more serious problem is that when you need

How to dynamically add menus/menu items, sub-menus, right-click menus, and menu item sub-menus Menu-related operations mainly use the CMenu class. Of course, the corresponding API functions are also available. The CMenu class is only the encapsulation of the function of the Operation menu in the API by MFC. However, if you can use a class, try to use the class. The class is well organized and the code looks

extension of the maximum sub-segment and classic problem. title Link: http://www.51nod.com/onlineJudge/questionCode.html#!problemId=1052 n integers consisting of a sequence of a[1],a[2],a[3],..., A[n], dividing the n number into disjoint m-sub-segments, and the largest of the M segments. If M >= the number of positive numbers in N, then the sum of all positive numbers is output. For example:-2 11-4 13-5

Label:Table is a good way to distribute the pressure of the database.Table, the most straightforward meaning, is to divide a table structure into multiple tables, and then, can be in the same library, can also be placed in different libraries.Of course, the first thing you need to know is how to divide the table. Individuals think that the number of single-table records to reach the million to tens the use of the table.Classification of sub-tables: 1.

Tags: hash useful server CRUD Database Server single table Bowen bottleneck physics 1. Database sub-Library sub-table 1.1. Preface 1.1.1. Noun explanation 1.2. Evolution of the database architecture 1.3. Issues before the sub-list 1.3.1. User request volume is too large 1.3.2. Library

Master-Slave read-write separation, sub-database sub-table1. Vertical Slicing2. Horizontal segmentationSolutions are: Mysql-agent, TDDL, Amoeba, Cobar, Cobar client, Mycat, SHARDING-JDBCDatabase partition partitionResources:1. Analysis of the realization principle of horizontal segmentation of database----sub-library, sub