What is the main role of follower in the server role of zookeeper?

Alibaba cloud Q & A 2022-02-13 06:01:20 阅读数:132

---

Take the answer 1：

---

copyright：author[Alibaba cloud Q & A]，Please bring the original link to reprint, thank you. https://en.javamana.com/2022/02/202202130601186807.html

• In mysql, what kinds of association queries are there?
• What are the characteristics of MySQL char?
• Why does MySQL add numbers to parentheses () after design types?
• What are the common startup and deployment methods of springboot project?
• Why spring?
• Explain what AOP is?
• What is the role of AOP?
• What is IOC?
• laravel8. 75. The use of cache supports redis and Memcache drivers
• Viewing and modifying Linux file permissions
• Phpstorm header annotation, class annotation and function annotation settings (slightly improved)
• JavaScript is prohibited in browsers. Take Google browser as an example
• MySQL enables remote access to root
• MySQL error - this is incompatible with SQL_ mode=only_ full_ group_ By perfect solution
• Phpstorm sets the indent position and equal sign alignment of the annotator
• Springboot from getting started to getting started (nine ORM mybatis)
• Springboot from getting started to getting started (eight orm-jpa-5 complex queries)
• Springboot from getting started to getting started (eight orm-jpa-4 example query)
• Springboot from getting started to getting started (seven orm-jpa-3 simple queries)
• Springboot from getting started to getting started (six orm-jpa-2 custom SQL)
• Springboot from getting started to getting started (five orm-jpa-1)
• When there is no network, the Linux update source reports an error
• Why is there a minus sign in the spring cloud configuration process
• How to convert XML and JavaBeans in hl7-v3 message format?
• Webpack packages the project using the redis Library of nodejs, and the packaged JS can be used in the browser
• What is the main role of IOC?
• What are the benefits of IOC?
• What are the common injection methods of spring?
• Are beans in spring thread safe?
• How many bean scopes does spring support?
• How does spring automatically assemble beans?
• What are the implementation methods of spring transaction?
• What is the transaction isolation of spring?
• Eclipse: it is slow to start in debug mode, and it is normal to start directly from run
• How to register a watcher on the client side in zookeeper?
• How to handle watcher on the server side in zookeeper?
• In zookeeper, how to call back the watcher on the client side?
• Springboot from getting started to getting started (four connection pools Druid)
• Springboot from getting started to getting started (3 JDBC & MySQL)
• Springboot from getting started to getting started (2) getting request parameters
• Springboot from getting started to getting started (a demo)
• MySQL learning notes -- creating high-performance indexes
• PHP + phpstorm + Xdebug remote debugging
• MySQL learning notes -- schema and data type optimization
• MySQL learning notes -- Architecture and history
• MySQL learning notes -- MySQL architecture and storage engine
• Layui uses echorts
• Navicat query MySQL database size_ Navicat view MySQL database and table capacity
• Start, stop and restart nginx, MySQL and PHP under Linux
• Upload files from xshell to Linux server
• Add background music to Java Games -- there are pictures and facts
• JQuery installation and download, providing the original files that jQuery can't download
• PHP reference manual and CSS JavaScript Vue JS reference manual
• Understanding of JavaScript and analysis of classic cases
• Usage of then () in JavaScript
• When using closeablehttpclient to make a remote service call, the first time is very slow or even the request times out
• Solve the data structure problem and realize the dictionary with queue
• Java programming question 4
• The verification code of Java project login does not work
• When there is no network, the Linux update source reports an error