evolution expeditions

architecture of the intelligent evolution of the road. The background of system reform In the Bohai Sea, the original it structure, supporting the new core, financial and BI and many other sets of business systems. According to the needs of the business, each business system adopts Db-link technology to realize the data exchange between business systems, and provides the data support for the business reading request. According to the analysis, the BI

Application is always the driving force of technological development. In the face of increasingly complex business applications, the technology architecture of network equipment has become a key factor in the application of equipment, and different applications require different network equipment. For example, the application of NGN needs to be based on softswitch technology architecture equipment, such as vertical network need to pay attention to routers, park network is the focus of the switch

Tags: jdbc record1. Evolution of the way data is stored① string② Array③ file④ DatabaseWhere ① and ② are present in memory and end with the termination of the program and are not persisted to the local disk③ and ④ store data on a local disk, and ④ can manage the data to select different levels of database based on different scenarios.Evolution of the 2.JDBCOrigin:Java program to read and write data on the disk, the major database vendors to provide a c

Server-side high-performance database optimization Evolution details caseOutline Business Scenarios The initial technology selection Read/write separation Vertical Sub-Library Horizontal sub-Library (sharding) Summarize Business Scenarios* * is the country's leading final three km logistics distribution platform. * * The business model is similar to Didi and Uber, using the social idle human resources in crowdsourcing

: Motorola Xoom Tablet PC ', 37,475); CreateText (Belt, ' Android 4.0 system release ', ' on behalf of Mobile: GALAXY Nexus ', 37,500); CreateText (Belt, ' Android 4.1/4.2/4.3 system release ', ' on behalf of Mobile: Nexus 7 tablet ', -65,585); CreateText (Belt, ' Android 4.4 system release ', ' Nexus 4, Nexus 7, Nexus 10, and native HTC One , Galaxy S4shield ', 36,684); CreateText (Belt, ' Android 5.0 system release ', ' Nexus 6, Nexus 9 tablet and Nexus Player ', 135,605);　　Such a simple roadm

High-performance MySql evolution (1): Data Type optimizationThe database performance tuning process involves a lot of knowledge, including whether the attribute settings of fields are appropriate, whether the index is created properly, and whether the table structure is reasonable, are database/operating system settings correct ..... Each topic may be a field. In my opinion, in key technologies for improving database performance, it is relatively diff

data Access layer external interface to be highly unified, do not easily change. 　　4. If we design the data access layer to solve the problem of database splitting, the data access layer plus the database actually combines a distributed database solution, it is very difficult to split the database is very high, because the database will have distributed features, Distributed development means more difficulty in development. 　　5. for the processing of distributed transactions, we try to analyze

ddd.infrastructure.4. Improvement:(1) The IService interface is defined at the application layer. (2) Further define all dependent interfaces in the domain layer and application layer, including dependency injection management.5. Code Map and Solution view:Better understanding and use: (1) at the architectural level, at the core of the domain, the other technology relies on a level of implementation, write code no longer have to worry about not knowing where to write. (2) Throwing domain logic

parameters in the template design.Type detection is done at the time the template is instantiated.A template implementation is a mechanism that is based on the user's description of the type that needs to be generated.34. Class templates can have default parameters, and template functions can notTemplateTemplateBecause the template parameter of a function template is determined by the type of the argument that the compiler is calling to.35. In terms of C + + language rules, there is no relation

. -------------------------------------------------------------------------------- Components of ADO + Now I want to introduce the main ADO + objects. We start with the origin of all the content, that is, the DataSet object. A dataset is the evolution of An ADO record set. The dataset is just a view in the database's disconnected memory. You can have dynamically created datasets and data tables without any information from the database management syst

update is a bit behind the slow version and go to the school of the great god directly copy the mostThe new SDK.The installation experience for the SDK is one sentence: copy someone else's SDK. Copy the SDK. Copy. Because it's so important, say it three times--this can saveA lot of human and material resources, three days is not necessarily able to do things in 30 minutes to complete.Later, after the class Android pioneer recommended, and installed Android studio, this process is relatively sim

that, for Android we also install JDK,SDK and ADT, first of all install JDK to build Java environment, I went online Baidu win7 installation tutorial, In the www.oracle.com successfully downloaded the JDK in line with the native version, but during the installation process, because the problem of the path is wrong, but the almighty roommate seems to have a similar problem before installation, change a path succeeded, run Cmd appeared:After that, I installed ADT and the SDK, found some on the ne

like there's no difficulty, maybe because I see the code is just some simple, I think in the future if you want to write a better software definitely need to use more window definition language it. If you want to say that the development process encountered problems, I think the biggest problem is the structure of the code, in the use of a new code when the most afraid of the code format requirements is how, these problems through the practice will be slowly discovered, in fact, a lot of code s

step to install down.Although Android Studio has been installed, but for the 0 basic people to learn the Android road is just beginning, Android Studio is not to say that a use immediately to get started, so should first learn how to use Android Studio then makes Android easy to develop. I am also a fledgling Android developer, so it is not possible to give Yimeimei any valuable advice, due to lack of development experience and can not make a review of different tools in different environments,

need to re-download, just need to change the SDK path. The third kind of installation is also relatively simple, the same SDK path to the first installation of the SDK, eliminating the steps to re-download. Three tools overall I feel that the difference is not very big,Android Studio has a more preview function,After all, the virtual machine is slow to open. But personally I'm more inclined to use eclipse, because before I learned that Java was done on Eclipse , it might be more customary to co

installation of ADT on the MyEclipse. ADT is an Android development tool that did not have this in MyEclipse, to install ADT before configuring the Android SDK in MyEclipse. Click the Add ADT address download under the Help list. I've installed it here before.The next step is to configure the SDK. Click the preference configuration under the Windows list.The next step is to create an AVD, an Android simulator.The last is to create a HelloWorld project.Just click on next and click Finish to fini

there is to consult the students, some of them have started the development of Android, about the construction of the environment, their common view is to use eclipse itself to configure the environment is very troublesome, endless problems. So the last choice is Android developers tools, the overall construction process is very smooth, the problem is mainly the IDE's version of the number of bits and the configuration of the JDK version of the number of bits inconsistent, resulting in the IDE

company for two years with your own computer (I feel my wallet said).4.ios development environment of the building although spent a whole day of time, but it was built to complete the sense of accomplishment, as for the experience of his strong, can only be later ...But the roommate has been living in the virtual machine of the world does not come out (the first thing to open the computer every day is to enter the Apple operating system), presumably should be very good.5. Many of the installati

this:{"Prj_name": "xzblog\n", "Prj_author": "Xz\n"}So let's just replace it, otherwise there's some unrecognized code in the command line in Ubuntu.Also, let's look at the following Linux commands to see if the ports you want to use are occupiedNETSTAT-LNP | grep your PortIf your php–s command starts successfully, you can use thePs-ef | grep 8081 // View your processThis lesson code is few, mainly with the actual exercise and the thought explanation mainly. There are several points of kn

"cloud computing" popular now, also recommend the high-speed development of the site, the use of "cloud storage" such a solution, can help you solve all kinds of storage, expansion, disaster preparedness, but also to do a CDN acceleration. The most important thing is that the price is not too expensive.Summary, about the image Server schema extension, roughly around these issues: Capacity planning and scaling issues. Data synchronization, redundancy, and disaster recovery. The