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Hadoop learning 1.Hadoop overview Infrastructure of a distributed systemIt mainly solves the problems of massive data storage and distributed computing 1.1 three major releases of Hadoop The original version of Apache was released in 2006Cloudera integrates many big data frameworks internally, and the corresponding product is CDH releas ...

I'm < font color = #2941c0 > "kangarooking" < / font >, not my brother's brother. An Internet worm "gua" cow will climb up step by step with you. One day there will be a day for us. Pay attention to me and make a little progress every day ❗ ❗ ❗prefaceThe experience of learning design mode mentioned in the arti ...

We will use a series to explain the complete practice of microservices from requirements to online, from code to k8s deployment, from logging to monitoring. The whole project uses the micro services developed by go zero, which basically includes go zero and some middleware developed by relevant go zero authors. The technology stack used is basi ...

** Steps:** 1, * intranet penetration application for secondary domain name (those with server and domain name can be omitted)* 2, * apply for wechat public platform test number * (those with * certified * wechat service number can skip)** 3, Build Spring Boot 2.0 project to obtain openId 1, Intranet penetration: Because it is necessary to ...

1 review - Interface oriented programming Root cause: decoupling, expandable, improved reuse. In layered development, the upper layer does not care about the specific implementation. Everyone abides by common standards, making the development easier and more standardized. The cooperative relationship between various objects has become the key ...

preface We will show you a go zero micro service example in detail through a series of articles. The whole series is divided into ten articles, and the directory structure is as follows: Environment constructionService splittingUser servicesProduct serviceOrder servicePayment servicesRPC service Auth authenticationService monitoringLink track ...

Okhttp is a commonly used network framework. Okhttp is developed by square company. It is necessary to master the usage of okhttp and its internal working principle. 1, Introduction mode   1.gradle introduction   implementation 'com.squareup.okhttp3:okhttp:3.14.7' implementation 'com.squareup.okio:okio:1.17.5' 2. Authority <use ...

Generally, the caller (client) of HIDL service is not in the same process with it. HIDL service generally provides hardware functions, and the caller (client) realizes characteristic functions based on this hardware function. Here, it is assumed that HIDL light service only provides the hardware function to control the on and off of specific LE ...

Reflection overview Reflection is that for any Class, you can directly get all the components of this Class "at run time". At runtime, you can directly get the Constructor object of this class: Constructor At runtime, you can directly get the member variable object of this class: Field At runtime, you can directly get the member ...

ECS is a data oriented programming idea. Entitas is an excellent framework under this idea. It is written according to the rules of the framework. When the program scale is relatively large, it is also easy to expand and maintain the code. It is suitable for people who are object-oriented programming but are not familiar with design patterns an ...