metadate high

In the process of expanding the size of Web websites from small to large, the database access pressure is constantly increasing, and the database architecture needs to be dynamically expanded, the database expansion process consists of the following steps. Each extension can improve the performance of the deployment method in the previous step by an order of magnitude. 1. web applications and databases are deployed on the same server. Generally, small-scale websites use this method. The user vol

Construction of non-high cells (1), construction of high Cells I. interface Setup 1. determine the development mode. If the interface is fixed, you can use some of the content on the xib interface to be unfixed, and use the pure code cell Method for Development (we use the combination of pure code and xib) 2. partition hierarchy 2.1 how to divide? Hide effects by function: under certain conditions, some c

GSD_WeiXin (high imitation) application source code, gsd_weixin high imitation micro High imitation plan:Implemented Functions1. homepage (cell slide edit, drop-down eye animation, drop-down short video, click to enter the chat details page)2. Address Book (contact Letter Sorting and search interface)3. Discovery (circle of friends)4. Me (Interface

An Effective Method for writing high-quality OC code and writing high-quality oc code1. Write this file only for your own memory, and there are related PDF files. If you need to leave a mailbox .. 2. Try to introduce as few header files as possible in Class header files. Do not introduce header files unless necessary. In general, you should use the Forward Declaration in the header file of a class to ment

IOS high imitation Gome, secondary application, thumb-up injection animation, movie screening page and other source code, ios high imitationIOS featured source codeHigh imitation Gome IOS bullet screen Library Imitation live video 321 countdown Animation High imitation Netease secondary element GACHA TabBar with raised rotation button in the middle of iOS IO

15 basic algorithm questions with extremely high frequency (with complete code) and extremely high AlgorithmsAlgorithm pseudocode for a question I wrapped up this question, and others quickly dispersed. I will tell you the answer tomorrow. Of course, it's just a thought. I have always been a fisherman, not a fish.I am asleep. Now I will answer your question. Thank you for your support! By the way, I feel t

Developed every day, it is inevitable to listen to some technical forums. They are all professional words. If you have never heard of them, it is a stranger. Record them. ========================================================== ====================== High Availability: 1. Ha 2. Single-node failure is transparent to users, that is, it has no impact and is still in normal use. Extension: Vertical Scaling: become Superman (only improving the perf

Hdu2199 (high-precision binary), hdu2199 high-precision binary Binary High-Precision Template How to Use the accuracy of the binary method # Include

JQuery high-performance custom scroll bar beautification plug-in, jquery high-performance Malihu is a high-performance jQuery plug-in that beautifies scroll bars. The scroll bar beautification plug-in supports horizontal and vertical scroll bars, mouse scrolling, keyboard scrolling, and mobile touch screens. It can be perfectly combined with jQuery UI and Bootat

Search process of HiPAC high-performance rule matching algorithm, hipac high-performanceWhen I received an email, A friend thought I had misunderstood nf-HiPAC. How can such a high-performance algorithm be forced by traditional hash and tree algorithms. Yes, HiPAC is a very powerful algorithm, and there are few documents. This increases the mystery of HiPAC, but

transport waste paper from Los Angeles to China than by electric cars to Seattle.4: Because China exports to the United States a large number of goods, imports of very little goods, resulting in the United States to China's cargo ship freight rate is lower, resulting in the United States shipped to China's low-cost goods, India to the Middle East exports more goods, imports less goods, so the U.S. waste shipped to India is more expensive than shipping to China;5: In Guangdong, people imported s

I have recently made some optimizations to a system and found that the performance of the high-concurrency system has the greatest impact. Let's share it with you: 1. Lock 2. context switch 3. Memory Allocation 4. Data copies 1. Lock Frequent Locks/locks can only be thought of for the system's performance. Originally, multiple CPUs (cores) run very cheerfully. As a result, the CPU may not be stopped due to the lock, and so on. Is the efficienc

Test and solution for high memory usage and high CPU usage of MySQL. The changes are as follows: Innodb_buffer_pool_size = 576 M-> 256 M InnoDB Engine Buffer occupies a large proportion, the first is to use it to open the knifeQuery_cache_size = 100 M-> 16 M query CacheTmp_table_size = 102 M-> 64 M temporary table sizeKey_buffer_size = 256 m-> 32 M After the mysql service is restarted, the virtual memory is

equalization, you can find their pros and cons:1. The hardware balance cost is high, the software balance most can use the free open source software to realize.2. Hardware equalization is more prone to failure detection than software equalization. In the case of hardware equalization, once a machine fails, it can be detected immediately and blocked instantly.3. Hardware equalization can be quickly added to the machine (access to the hardware interfac

High-performance and high-concurrency counters in MySQL There are a lot of projects that implement counters at will. For example, when we implement the number of clicks on a website article, we design data tables like: "article_id, article_name, article_content, article_author, article_view ...... Record the page views of this article in article_view. Fraud seems to be okay. This is what we do for a small w

Configuring Ipvs high-availability clusters based on the crm+hb_gui+ldirectored interface This article is from the "Ccschan" blog, make sure to keep this source http://ccschan.blog.51cto.com/11854461/1925395Configuration of the Linux High Availability cluster Scheme heartbeat v2 based on Crm+hb_gui interface, configuring Ipvs High Availability Cluster

Course Name: Marco Linux High paying employment introduction-Install learning VMware workstation9-1Course Content: Virtual machine installation and OS system configuration instructionsVirtual Machine hardware configuration:CPU,MEMORY,I/O (Disk,ethercard)Virtual Machine Keywords:1.disk image file (disk image files)2.Sparse (sparse format)3.CPU Hyper-ThreadingVirtual Machine Usage Tips:1. Virtual machine disk is recommended to place a large space, the s

High-precision addition to the third time study ... I understand the content.1#include 2#include 3#include 4 using namespacestd;5 #defineMaxLen 1106 intMain () {7 CharA1[maxlen],b1[maxlen];//the original Addend string entered8 intA[maxlen],b[maxlen],c[maxlen],lena,lenb,lenc,x;//storage of two addend, results, length and rounding of addend results9Memset (A,0,sizeof(a));Tenmemset (b,0,sizeof(b)); OneMemset (c,0,sizeof(c));//Initialize Ascanf"%s

In the early development of the application system, because the development of database data is relatively few, for query SQL statements, complex view of the compilation, just start will not realize the performance of the various writing of SQL statements, but if the application system submitted to the actual application, as the data in the database increased, The response speed of the system becomes one of the most important problems that the system needs to solve at present. A very important a

secondary function.Create a custom hash indexIf the storage engine does not support a hash index to create a pseudo-hash index, you can do it yourself. Idea: Create a pseudo-hash index based on the B-tree index.Spatial Data Index (slightly) Full-text index (slightly) other index categories (slightly) 2, the advantages of the index index of the three major advantages: The index greatly reduces the amount of data that the server needs to scan; Indexes can help the server avoid sortin