elm architecture

Framework: MyBatisSecurity framework: Apache ShiroServer-side validation: Hibernate ValidatorTask Scheduler: QuartzLog management: slf4j 1.7, log4jClient-side validation: JQuery ValidationDynamic tab: EasyuitabFront-End frame: Bootstrap, Vue3. Design IdeasDistributed, microservices, cloud architectureJava language development, cross-platform, high-performance, high-availability, secure, service-based, modular, component-driven development model4. Platform Basic functionsUser management: The use

Opening and closing principle OCP (Open for extension,closed for modification). The core idea of open and close principle is that an object is opened to expansion and closed to modification. In fact, the opening and closing principle means that changes to the class are made by adding code rather than altering the existing code. In other words, once the software developer writes out the code that can be run, it should not change it, but to ensure that it can continue to run, how to do this? Th

" This completes the Redis master-slave configuration. 3.4.3 Configuring Redis parameters in a marketplace project Configure the Marketplace project in the Web node, specify the Redis virtual IP Vim/usr/local/tomcat8/webapps/slsalesystem/web-inf/classes/applicationcontext-mybatis.xml 3.4.4 Test Cache effects Redis-cli-h 192.168.144.188-p 6379 192.168.175.188:6379> Info keyspace_hits:1 或者 keyspace_misses:2//关注这个值，命中数和未命中数登录

Welcome everyone to discuss, I also contact time is not long, there are questions welcome to correct me. Welcome reprint, Reprint please indicate the source Haddoop 1.0 deficiency and Hadoop2.0 production People who have studied and studied Hadoop1.0 should know that in Hadoop1.0, the Master\slave architecture pattern is used, Jobtracker runs on a single point of Namenode, and has two functions of resource management and job control. Makes it become t

Architecture of MapReduce: -Distributed Programming architecture -Data-centric, more emphasis on throughput -Divide and conquer (the operation of large-scale data sets, distributed to a master node under the management of the various nodes together to complete, and then consolidate the intermediate results of each node to get the final output) -map to break a task into multiple subtasks -reduce the decomp

(such as paging, linkage drop-down list, etc.) are written in the control, nature is universal. Let's talk about the data access layer first. My impression: The three-tier architecture of the data access layer is not universal, in fact, I now do not fully understand the three-tier architecture of the data access layer exactly what to write, the feeling is repeated written SqlConnection cn = New SqlConnecti

I. The concept and architecture of Rman Recovery Manager (RMAN) is an Oracle tool for backup (Backup), restore (Restore), and recovery (recover) databases. Rman can only be used in ORACLE8 or higher versions. It can back up the entire database or database parts, such as tablespaces, data files, control files, archive files, and spfile parameter files. Rman also allows you to perform incremental block-level backups, and incremental Rman backups are ti

/php/php.inicgi.fix_pathinfo=0启动php-fpm服务：启动完毕之后，php-fpm服务默认使用9000端口[[emailprotected] php-7.2.8]# /usr/local/php/sbin/php-fpm[[emailprotected] php-7.2.8]# ss -anltLISTEN 0 128 127.0.0.1:9000 *:* 最后配置nginx编辑nginx配置文件/usr/local/nginx/conf/nginx.conf ，主要修改nginx的server，{}配置块中的内容，修改location块，追加index.php让nginx服务器默认支持index.php为首页：（在尾部追加了index.php）2.更换为下方内容location ~* \.php$ {root html;fastcgi_pass 127.0.0.1:9000;fastcgi_index index.ph

Distributed: Decentralized pressure. MicroServices: Decentralized capabilities. today's understanding of distributed: Different modules deployed on different servers: distributed solutions for high concurrency problems cluster: The same service multiple servers deploy the same application to form a cluster role: through the load Balancer equipment to provide services soa[Assembly services/ESB Enterprise Service Bus] The business system is decomposed into multiple components, allowing each c

migration actually happening, On the other hand the fact is that if it does not seem to be slow to make people irritable can not work very well, for this contradiction, MongoDB needs to implement two techniques, so that the Shard more understanding, but also not the production of hope to cause the impact of fragmentation. Custom Block Size The first time you start MONGOs, you can declare the--chunksize n parameter, where n is the block size you want, the unit is MB, if you just wa

is migrated successfully, all configuration servers must be in the same order, and if any of them is down, all the migrations that are currently in progress will be rolled back and stopped until the entire configuration server is running, and any one configuration server is down and the cluster configuration cannot be changed.3, the structure of the clusterA MongoDB cluster is basically composed of 3 types of processes, that is, the shards that actually store the data, the MONGOs process that i

MySQL Architecture650) this.width=650; "title=" Tixi.png "src=" http://s3.51cto.com/wyfs02/M01/6E/5E/ Wkiom1v6r2fqicxuaak2-qjgvto877.jpg "alt=" Wkiom1v6r2fqicxuaak2-qjgvto877.jpg "/>MySQL Storage engine architecture650) this.width=650; "title=" Yingqing.png "src=" Http://s3.51cto.com/wyfs02/M01/6E/5E/wKiom1V6R47jlvc1AAI0o_ Qnnp0940.jpg "alt=" Wkiom1v6r47jlvc1aai0o_qnnp0940.jpg "/>The tuning experience brought by the architecture:Per-threads-bufferr bits per connection session memory, not too lar

Architecture, aka Software architecture, is an abstract description of the overall architecture and components of the software that guides the design of large software systems in all aspects.In terms of what a pattern is, the word from architecture is defined as: "Each pattern describes a problem that recurs around us

High performance, integrated security, full virtualization: MSG product Architecture Analysis, msg Architecture As early as 2013, when traditional ADC devices were still using Intel embedded basic CPU platform, as an excellent professional application delivery vendor in China, Taiyi Xingchen has completed the Intel Product Sequence laying: lingdong-> core-> Xeon, with Intel's continuous optimization of pr

C/S architecture This is the first letter of the two words of client/server, which means that the 客户端 服务器 architecture means that a lot of common software is this kind of architecture. Explain For the C/s architecture, the most common example is the online game, for example LOL , if the Int

"Domestic large-scale portal site architecture analysis" is divided into two parts, the original author was written in 2004. But it still has a good reference meaning to the present large-scale website structure. The architecture of large community websites Analysis on the structure of large portal site How to do a mirrored server Realization scheme of Intelligent load balancing for domain name double line

and rarely changes , such as the product's category information, popular commodity information, and so on. In this way, when the application reads the data, it goes to the cache first, such as the cache is not or invalidated, and then fetched in the database, and re-written to the cache for the next visit. Therefore, it can improve the system performance, improve the data reading speed and reduce the storage access pressure .③ Distributed Cache Architectur