d sub monitor

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-

Tags: blog http java using OS IO file dataThis article reproduced: http://www.cnblogs.com/olartan/archive/2009/12/02/1615131.htmlChapter 1th IntroductionWhen the amount of data is large, the multiple tables are divided into different db first, then the data is distributed to different databases according to the key columns. After the library distribution, the system query, IO and other operations can have a group of multiple machines together to complete. This article is mainly aimed at, the mas

Tags: Table name core AVG relational database algorithm advantages start Big Data Corp.Database Library sub-table from the Internet era has been a hot topic. In today's NoSQL, relational databases are still preferred by most companies because of their stability, query flexibility, and compatibility. Therefore, it is an unavoidable problem for major Internet companies to use the sub-database technology to de

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

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

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

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

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

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

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

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

The maximum and sub-arrays are the array and the largest subarray, aka the largest and the subsequence. A subarray is a contiguous n-element in an array, such as A2,A3,A4, which is a 3-length sub-array. As the name implies, the maximum and sub-arrays are required and the largest sub-array.　　An array of n elements conta

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

. I don't think it's good to have indexes on a database, but how do you improve the performance of queries if you don't build indexes?6: It's all a distributed database. Put it in more than one table, it's okay to associate directly. Important is horizontal slicing7: Recognition of sub-tables, sub-libraries, caching practicesReferenceProblem Analysis:Daily forum visits about 3 million, update posts around 1