architectural walkthrough

problems like this. The initial architectural evolution is typical of the lamp route: originally developed in PHP, almost all programmers used PHP initially as three servers: a Web, a database, a PHP to expand, start using Memcache, and then introduce front-end cache, Then add Haproxy in front of the cache, then the MySQL sharding (very effective) using the "Squeeze everything on a single server" way. Two backend services have been developed in C in

does not affect the concept model of state transition and the characteristics of server stateless.A friend with architectural design experience should be aware that, compared with stateful service design, stateless services can easily achieve the lateral scalability of system performance. By adding hardware, deploying multiple stateless services, and load balance are not constrained, while stateful service mode, session storage, sharing will bring pe

Model-view-controller (MVC) is an architectural pattern, frequently used in Web applications. Which of the following statement (s) is (was) correct? (multiple selection)A, Models often represent data and the business logics needed to manipulate the data in the applicationB, a view is a (visual) representation of its model. It renders the model into a form suitable for interaction, typically a user interface elementC, a controller is the link between a

To the users of Photoshop software to detailed analysis to share a copy of the Architectural landscape blueprint effect of the production of the tutorial. Tutorial Sharing: First look at the final effect: 01 Open a small square file, we have to do the blueprint of the lattice. The side length depends on the size of your picture. 02 Enlarge the view and use Line tool (1 pixels, blue) pull out L

To you photoshop software users to detailed analysis to share a picture of the aesthetic cyan architectural photos of the later color palette tutorial. Tutorial Sharing: Layer is Photoshop the most basic and most commonly used image processing functions, it is difficult to imagine that the first few versions of Photoshop do not have this function bar. Layer can help us adjust the color and tone of the picture, solve the local expos

functions are provided in the form of plug-in, convenient for our system architecture evolution process, we can reasonably choose the components required for integration, so that the evolution of the architecture will be smoother and smoother.Micro-service architecture is a trend, Spring cloud provides a standardized, all-in-one technical solution, meaning may be comparable to the current servlet specification is born, effectively promote the service side software system technology progress.Thi

pressure, the system performance began to decline, But the resource consumption will be more, until point D, the system crash point, more than this point continues to pressure, the system will not be able to process any requestsPerformance testing reflects the processing power of the system, which corresponds to the user's wait time (response time), as shown in the following:Each point corresponds to the above performance test diagram until the system crashes and the user loses responsePerforma

operations, put the background to do, first return the data to the user, this alsois to see business needs, there is a certain limit, not what business can do this I, using the cluster, memcache REDISJ, code optimization, resource reuse, thread pool (redis/mysql connection pool) k, storage performance optimization, namely: Hardware performance improvement, many, such as hard disk, mechanical hard disk- > SSD Some servers need a better CPU summary: Website performance optimization technology is

. NoSQL storage is more convenient for unformatted data, NoSQL is more suitable for big data calculations, and the more popular NoSQL databases are HBase, MongoDB, CouchDB, Redis, Cassandra, etc.Different NoSQL databases use different storage methods, such as Redis,memcache, such as using Key/value key-value pairs of storage, mongodb,couchdb and so on by the document storage, a record of all the data are stored in the document, HBase, Cassandra and so on are column storage.As shown in the follow

into a number of different applications, each application independent deployment maintenance, applications can be linked through hyperlinks, Message Queuing, and so on, as shown in:10. Distributed ServicesOn the basis of business split above, some of the public services are extracted and deployed independently, such as user management, commodity management, reusable Business Connection database, providing public service, and application system only need to manage user interface;As shown in the

whether it is, or java/lamp, no matter what platform, the same reason. (Big picture)In this architecture diagram, the same is true if you replace IIS with Apache,sqlserver and replace it with MySQL. A reasonable architecture is platform-independent. The most uncomfortable is some of the industry so-called master, said the large web site with ASP. No, no java/lamp good. Believe you see this architecture diagram, think about Bing,hotmail,myspace,match,360buy,qidian and so on. NET-based large Web

duplication of work, but also save network bandwidth; The ETag parameter is also a commonly used cache control parameter to solve the problem of insufficient last-modified time accuracy. In addition, the HTTP protocol has direct support for the Proxy mechanism, in combination with the cache mechanism, in applications that require high performance, a number of caching proxy servers dedicated to cache purposes can be deployed between the server and the client to improve system throughput.SummaryF

failures, etc.)3). Due to the different system parameters of each device, a data dictionary based on meta-data structure is required to be used for system indexing.4). To get through the data communication and interaction mechanism of the MES system and the bottom control Unit plc, deploy the middleware platform; "For example, data interaction format based on XML/XSLT" This part of the work requires close cooperation with the PLC suppliers, the technical requirements of the document;5). From th

->value pair). Then call Entity.initentity (); Actor Actor is also a resource, loaded through Assetloader.loadactor (); corresponding to Assetfamily.actor. The corresponding resource bundle is "actor?". Unity3d ", in the package for the Gameobject; The actor's loading entry is in: Card.determineactorthentransitiontozone () Spell The loading entrance of the spell is at Entity.processcarddefassetrequest () Card Called Entity.initcard () in init

Use weekend time to learn the old boy education professional drawing free video, benefited from the original URL as follows:Hand in hand with your drawing 1- Edraw Professional drawing schematic Super detailed practical tutorial ( Limited time free )Http://edu.51cto.com/course/course_id-6173.htmlHands-on with your drawing 2-visio Professional architecture Diagram in combat (limited time free)Http://edu.51cto.com/course/course_id-6334.htmlThe first drawing, the level is limited, hope this is a go

the people, street lights, lights, advertising, shop glass raw materials, Here must be a good division of labor, in accordance with the big overlook, overlooking, human vision, close-up to make a camera preview, and other projects with the recognition of the project manager, after the animation project group discussion, after all. Third, qualified hardware foil equipment, the current Shanghai and Guangzhou have special to help you foil the scene, can give them to the end, even if the foil into

questions need to be noted:To do this, it is possible to test the failure, it may be because there is no binding, this thing sometimes need to be done manually, on the binding right-click on the Generate binding Content (that is, two large boxes in the middle of the small box) on the line.The second thing to note is the PHP WSDL cache, which is typically closed for the WSDL cache when testing, otherwise you might be using the original WSDL file instead of the updated one. There are two ways to

performance. note that sprites in a static layer can still be "animated" as far as they're not transformed or scaled. Batch Layer A batch layers will behave very similarly to how a batch node (ccbatchnode) currently works in cocos2d. all the children of a batch layer will have to use the same "material" thus allowing the front end to combine all the draw CILS for that layer in one single one. (erroneously) adding children that use a different material to a batch layer will trigger an Assert ().

assembly, like this: #if UNITY_EDITOR Obj = Resources.LoadAssetAtPath(assetPath, typeof(T)); if (Obj == null) Debug.LogError ("Asset not found at path: " + assetPath); yield break;#elseClass assetcache: The resource cache mechanism is described in the assetloader section. We have already mentioned: The timestamp of resource items in assetcache, which is maintained by assetloader during resource loading requests; Assetcache is mainly responsible for managing ca

Architectural Design Source: Scenario Analysis of design patterns (1) publish-subscribe Author: poechant Blog: blog.csdn.net/poechant Email: zhongchao.ustc@gmail.com Date: February 24Th, 2012 I have read only the original English (or photocopy) books and some documents on the Internet in terms of design patterns. There are many proprietary terms in the design model. Because I don't know what part of the Chinese translation is, this article is wr