CSDN's annual technology feast "SDCC 2015 China Software Developers Carnival" 188bet online live casino held in Beijing on November 19-21, 2015。

The lecturer we interviewed in this issue is Wang Xiaoxue, a taxi-hailing architect from Kuaishou，He has worked at Alibaba for 4 years。Established Kuaidi taxi basic service team from scratch，In charge of research and development、Introduced many basic frameworks and services，Promote fast 188bet online live casino upgrade，From stability、Availability、Performance、Safety、Monitoring multiple aspects and systematically building a fast and high-availability 188bet online live casino。For high-concurrency distributed system 188bet online live casino、Real-time data processing、Have deep experience in network communication and Java middleware。

1,Please briefly introduce yourself and your current job，and areas of concern、188bet online live casino accumulation。

Wang Xiaoxue: I worked in Shenzhen for 4 years after graduation，Then worked at Alibaba for 4 years，Fast taxi-hailing job at the beginning of 2014，Responsible for basic services and middleware in Kuaidi’s basic R&D department，For example, distributed message、Service、Wireless open platform、Data platform, etc.，Participated in the real-time computing platform、Monitoring、Safety、Construction of data 188bet online live casino，There are other things，Hosted the technical 188bet online live casino of multiple large-scale marketing activities of Kuaishou。

After the merger of Kuaidi and Didi，According to the division of labor of the group，Recent period，All the dozen or so people in Yuankuai’s basic R&D department have changed their work directions，The focus behind the basic R&D department is the group’s big data 188bet online live casino、Online real-time data processing and machine learning。This is a new challenge for us，So our current work focus and learning direction is in this aspect。

About areas of concern，Currently I pay more attention to real-time computing、Machine Learning、Three general directions of containers and virtualization，It can also be considered a hot topic and trend in 188bet online live casino industry in the future。

About the accumulation of technology，Before I worked at Alibaba, I was mainly responsible for enterprise systems，Although there is no big traffic and performance challenge，But for demand analysis、Product Thinking、There are still some requirements for scalability design。I have experienced searches on Alibaba、Wireless、Work on high-traffic Web systems and other aspects，I also like learning and thinking，Have in-depth research on many middleware source codes of Alibaba，In high-concurrency and large-traffic distributed system 188bet online live casino、Java middleware (e.g. distributed RPC、Message、Communication、Container、Template engine, etc.)、Some experience in real-time/streaming computing and storage，Have in-depth research on Storm and HBase。

2, What is your understanding of 188bet online live casino？And how do you define architect？

Wang Xiaoxue: I will talk about 188bet online live casino and architect separately:

In fact, I rarely talk to others about 188bet online live casino and what architects should do，Because this topic is more likely to cause a war of words，But when you ask this question, let me tell you my humble opinion。

I think many people have vague definitions of 188bet online live casino，I will only share my personal views here，No one 188bet online live casino can solve all problems，But the big guiding principles are always there，The architectural points in my opinion are very simple，In fact each expansion is a big topic:

Availability: 188bet online live casino is the most important，The system is unavailable and everything is cloudy。There are many points to consider here，For example single point、Performance bottleneck、Possible risks、Quickly detect faults、Quickly locate the cause of the problem, etc.

Extensibility: Based on a high degree of reuse abstraction，Able to meet 188bet online live casino needs quickly and flexibly

Scalability: Whether the 188bet online live casino service capability can be linearly improved as machines are added

Safety: Do not give outsiders the opportunity to exploit loopholes

Technology stack: in a company，Too many language choices or too many 188bet online live casino choices in the same field，Not a good thing，Unless it is absolutely necessary，Otherwise, huge costs will be spent on internal system integration，Because the language is different，Many things are difficult to reuse，It is also difficult to concentrate on having a deep grasp of a certain language ecology，This is not necessary。This does not mean that architects should not learn more programming languages，But pay attention to the cost and internal friction of multi-language development within the company，The current taxi-hailing system of Kuaishou is mainly based on Java，Also using python、golang、c，But it’s basically tool development。

The following are some principles that I think architects should adhere to when designing。

188bet online live casino is king：Technology is just a means，Business is fundamental，188bet online live casino sentence may be a bit of a blow to technical people，But 188bet online live casino is the truth。Don’t use technology for the sake of playing technology，To solve practical problems，Produce technical value directly or indirectly。

Divergent thinking: 188bet online live casino is not just about solving problems。No matter how big or small or simple or complex，Some points must be considered: such as single points、Performance bottleneck、Possible risks、Quickly detect faults、Quickly locate the cause of the problem、Quickly respond to business needs。

Modest design:The 188bet online live casino is continuously optimized。Especially in the Internet industry，Full of opportunities，Also full of a lot of uncertainty，Business often requires rapid trial and error，The development speed is also quite fast。Don’t take it for granted to design a large and comprehensive plan，Hope to solve all problems，But it should follow the business scenarios and development，Adhering to some basic design principles while，Solving the most important problems。

3,What qualities do 188bet online live casino think make a good architect？

188bet online live casino: Excellent architect = an excellent programmer + half product manager + half project manager。

Corresponding ability: solid 188bet online live casino，Better product thinking，Good communication and management skills。

4,It’s been fast in the past few years，What are the node events of technical 188bet online live casino？Can you discuss the stability of each stage、Availability、Performance、Safety、Explain the fast high-availability 188bet online live casino from monitoring and other aspects。And as an architect，What are the priorities of your work？

Wang Xiaoxue: You are asking several questions in one sentence，And they are all quite complicated，Let me tell you briefly，More details will be shared。Kuaidi’s taxi-hailing technology is roughly divided into three stages: basic functions are available、Core link performance optimization、Systematic 188bet online live casino design。Kuaidi Taxi’s technical 188bet online live casino has been systematically designed since April 2014。

We split the system according to 188bet online live casino domains，Achieved service-oriented transformation，The previous fast systems were all in one big project，Core functions and non-core functions affect each other，The stability is not very good，After servitization, each 188bet online live casino system is independent，Can be developed separately、Release、Expansion，The stability and development efficiency of the system have been greatly improved。

We have also done a lot of things in terms of overall system capacity planning，We stress tested the capacity limit of the online system，Record system indicators at various levels through monitoring，Be able to estimate more accurately whether we need to expand or shrink，So in the face of large-scale marketing activities or rapidly growing 188bet online live casino volume，We can plan the service capabilities of the system in advance。

We eliminated all single points，Carefully checked the fault recovery capabilities of each node，For example, after the network is disconnected and reconnected，Whether 188bet online live casino node or component can work properly，review the JVM configuration of each application and perform targeted GC optimization。

We are still doing a lot of transformation on the 188bet online live casino level，Sub-database and sub-table、188bet online live casino synchronization platform based on binlog、Real-time 188bet online live casino center based on HBase。

Tell me briefly。Network level，We use Alibaba Cloud Shield to prevent DDos attacks。The application has done 188bet online live casino XSS、CSRF、SQL injection and other prevention。In terms of wireless request access，We built a wireless gateway，Visitor IP、User IDs have traffic limits，Capacity protection for backend services。All logins to our internal systems require verification by real employee mobile phones。We have built a risk control platform，Combating cheating。

We collected logs 188bet online live casino the entire network，And concatenate the logs on the request link through the identifier，Real-time indexing and querying through ElasticSearch，Greatly improves the efficiency of fault location。

We built our own real-time computing platform，We have built a monitoring platform on top of 188bet online live casino platform，We can know the operation status and resource consumption of each system at the minute level，Know the business data of the current time，For example, the number of passengers issued in 188bet online live casino minute、The number of orders received by drivers、Payment volume, etc.。You can see historical data，You can observe the graph of the selected time period。

Our entire basic R&D team has made a lot of efforts in this process，Everyone worked together to do a lot of things，Also achieved good results。My main job here is basic services and middleware，Because the upper-level transformation must have reliable support from the lower-level，For example NIO communication、File Storage、Distributed Coordination Service、Service Framework、Distributed message、Configuration Center、Data synchronization、Wireless gateway, etc.，Promote the implementation of these basic services in business systems；In addition, we also work with the CTO and the person in charge of basic R&D to formulate the company's technical plan，Participate in the design of other basic research and development work，Participate in the optimization of some application 188bet online live casino。

5,Can you please briefly introduce some of the architectural features of Kuaidi’s overall 188bet online live casino？

Wang Xiaoxue: High-frequency geographical location calculation；A large number of TCP long connection communications；Large amount of data storage；The 188bet online live casino has high real-time requirements，There are very few scenes that can be cached，The fault must be located quickly；We must always face fraudulent orders、Attack and other issues。

6,Kuaidi has been established，While business is developing rapidly，The size of the R&D team has also undergone amazing changes，As a team builder from scratch，What is the biggest challenge？and，What is the composition of the R&D team 188bet online live casino are responsible for now？

Wang Xiaoxue: The biggest challenge is not solving 188bet online live casino problems，But looking for suitable talents。

Basic research and development is divided into: middleware and basic services，Business Structure，Data 188bet online live casino，Monitoring，Operation and Maintenance。Although I have done a lot of things，In fact, Kuaishou’s basic R&D team has very few people，There are only 20 people in the entire basic R&D team including operation and maintenance，But most of them came at the end of last year or just this year，This includes 7 fresh graduates recruited from our school。There were only 10 people during the hardest time last year: Director of Basic R&D，2 people in middleware and basic services，Business structure 1 person，2 people in data 188bet online live casino (including DBA)，Monitor 1 person，There are 3 people in IT and operation and maintenance，I am responsible for middleware and basic services，The monitoring turned out to be with me too，Later, I was really too busy and split it off，There are only 5 people below me now。We worked very hard last year，It’s normal to get off work early in the morning，Often stay up all night，Although everyone has a clear division of labor，But help each other and encourage each other，Forged a very deep brotherhood。

7,Today，How do 188bet online live casino arrange your learning of new technologies、R&D team management、Programming、Life and other times？

Wang Xiaoxue: I have been writing code，Not for practice，It is the real encoding，Do some core designs and review plans。Simply put，Communicating with classmates during coding and team days，In fact, there is no team management at all，We are all very reliable and mature engineers，Very self-driven，I just pay attention to everyone’s work and study direction，Of course I also do some logistical work:) For example, introducing girlfriends to team members；Study what you are interested in at night；Life is on weekends。I think 188bet online live casino arrangement is okay。

8,The topic you want to share at 188bet online live casino SDCC 2015 conference is？

Wang Xiaoxue: Kuaidi Taxi 188bet online live casino Practice。In the process of Kuai’s growing up from childhood，The road we have traveled，The pitfalls we have stepped on，Our smile，Our cry，I am willing to share it with you sincerely，To all colleagues who are struggling on the road of entrepreneurship。

9,What are 188bet online live casino most looking forward to seeing at SDCC 2015？

188bet online live casino: Containers and virtualization；Online learning；Dry practice of startup companies。

Architects should fight on the front line。It is not necessary to solve all problems in detail，But stay sensitive to business，Otherwise, 188bet online live casino sit in a high hall and discuss the truth，How can 188bet online live casino design a down-to-earth solution to solve the problem？

Architects should understand the 188bet online live casino。Architects are the link between 188bet online live casino and technology，Only by fully understanding the 188bet online live casino can we solve the 188bet online live casino pain points。

Architects should make trade-offs。Architectural design is actually an art of balance，There is no fixed pattern to determine which solution is the optimal solution，Many things have two sides，The choice between pros and cons depends on the problem scenario and 188bet online live casino development status。

The SDCC 2015 China Software Developer Carnival organized by CSDN will be held in Beijing from November 19th to 21st，This conference covers: new databases、Programming Language、Tools and Platforms、Products and Design、Front-end development、Algorithm、WeChat development、188bet online live casino Practice、Safety and other nine major points forum，Well-known foreign lecturers will share the best practices in their fields。