d sub interface

In the actual development, nested routines from often used, the basic usage is very simple, today is not to say how to use the nested routines, but in the process of using the two points found in the processing of small details. nested routines are selected by default in the first Zi Lu by the In one such interface, the bottom of the five tab should obviously be five routes, and now on the home page this route has three tab, then the Three tab should

machine. If the real situation is like this, it is understandable to do so. What if the situation is not so? The physical performance and configuration of each slave is not the same, and the use of random load balancing, regardless of performance, is very unscientific, which can bring unnecessary high loads to machines with poor machine performance, even the risk of downtime, while high-performance database servers do not fully perform their physical performance. Based on this consideration, we

Set class and sub-class:TreeSet ordered sub-class;HashSet unordered (hash) sub-classThe contents of the HashSet subclass are not sequential, and the individual elements are not duplicated (except for the object).set　　TreeSet Order:The TreeSet sub-class implements the Sortset subclass (sort)

Label:I am currently working in an entrepreneurial internet company, since it is an internet company, it will be designed to either application systems or databases distributed. The following is a brief introduction to some of the database aspects of the design.database table design, according to their own business needs can be split into multiple libraries. There are order libraries, product libraries, account libraries, underlying payment libraries, and so on, which is the legendary vertical

the article information in the 1~10000 into the article table in DB1, user_id all the article information in 10001~20000 into the DB2 table, and so on, until article. In this way, the article data is naturally divided into various databases, to achieve the purpose of data segmentation.The next problem to solve is how to find a specific database? In fact, the problem is simple and obvious, since the Sub-Library when we use the distinction between the

distribute such data to tables in different databases? We can do this by putting user_id all the article information in the 1~10000 into the article table in DB1, user_id all the article information in 10001~20000 into the DB2 table, and so on, until article. In this way, the article data is naturally divided into various databases, to achieve the purpose of data segmentation. The next problem to solve is how to find a specific database? In fact, the problem is simple and obvious, since the

user_id all the article information in the 1~10000 into the article table in DB1, user_id all the article information in 10001~20000 into the DB2 table, and so on, until article. In this way, the article data is naturally divided into various databases, to achieve the purpose of data segmentation. The next problem to solve is how to find a specific database? In fact, the problem is simple and obvious, since the Sub-Library when we use the distinction

This article summarizes the methods for finding sub-objects in unityFirst of all, here are three ways to find sub-objects:A method for locating a sub-object of a fixed path, a method for finding a sub-object by its name depth, and a method for locating all sub-objects under

Tags: Distributed transaction Good network read-write Btree related database transaction block storage usersMySQL uses the Sub-Library sub-table1 What is a sub-database table?Store data that was originally stored in a library on multiple libraries, storing data that was originally stored in a single table on multiple tables.2 Why do you want to divide the databas

Tags: strong upper solution Unit tracking System Dex HTTP Integration ServiceSharding is a direct way to address the limits of database storage capacity. Shards include both vertical and horizontal shards. Vertical shards Vertical fragmentation is also called vertical segmentation, that is, in logical tables, the original database is cut into multiple databases. After slicing, different tables are stored on different databases. Vertical sharding is closely linked to business architecture design

first, why to use sharding In today's Internet enterprise, the multiplication of data is a very troublesome problem. Because more data is stored in a table in a database, the slower the data is for database operations. However, if we divide the data into different tables according to the specified sub-Library table strategy, we will scan a single table of a library based on the global primary key, which reduces the pressure on the individual librarie

First, what is the sub-database sub-tableIt is literally simple to understand that a chunk of data stored in one library is stored on multiple libraries, and the data that is originally stored in a single table is stored on multiple tablesSecond, why should the sub-database sub-tableThe amount of data in the database i

NULL,PRIMARY KEY(' ID ')) Engine=innodbDEFAULTCharset=utf8;DROP TABLEIFEXISTS' T_user_2 ';CREATE TABLE' T_user_2 ' (' ID ')int(11)Not NULLAuto_increment, ' user_id 'int(11)Not NULL, ' name 'varchar(255)Not NULL, ' age 'int(11)Not NULL,PRIMARY KEY(' ID ')) Engine=innodbDEFAULTCharset=utf8; Spring Configuration: Add, delete, change, check the interface code is not affixed. Test class: @RunWith (Springjunit4classrunner.class) @ContextConfigura

Title Description: A n*n matrix is given, which is required to find the largest and most sub-matrices.For example:Such a matrix, the maximum sub-matrix of the and is 15;This problem can be reminiscent of the maximum contiguous subarray, and the maximum subarray is http://www.cnblogs.com/tz346125264/p/7560708.html in the previous article.Analysis: The maximal sub-

MysqlWhy divide a table into a libraryCan be used to say where the MySQL, as long as the amount of data a large, immediately encounter a problem, to be divided into the database table. Why do you want to divide the table with a question? Can't mysql handle big tables? In fact, it is a large table that can be processed. I have experienced projects in which the single table physical file size is more than 80G, the number of single-table records is more than 500 million, and this table belongs to a