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# 一、对Kafka的认识
**1.Kafka的基本概念**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278252777435.jpg)
**2.安装与配置**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278253133234.jpg)
**3.生产与消费**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278254431073.jpg)
**4.服务端参数配置**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278255562804.jpg)
# 二、生产者
**1.客户端开发**
* 必要的参数配置
* 消息的发送
* 序列化
* 分区器
* 生产者拦截器
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278256278662.jpg)
**2.原理分析**
* 整体架构
* 元数据的更新
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278257877241.jpg)
**3.重要的生产者参数**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278257225870.jpg)
# 三、消费者
**1.消费者与消费组**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278258111268.jpg)
**2.客户端开发**
* 必要的参数配置
* 订阅主题与分区
* 反序列化
* 消息消费
* 位移提交
* 控制或关闭消费
* 指定位移消费
* 再均衡
* 消费者拦截器
* 多线程实现
* 重要的消费者参数
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278259263859.jpg)
# 四、主题与分区
**1.主题的管理**
* 创建主题
* 分区副本的分配
* 查看主题
* 修改主题
* 配置管理
* 主题端参数
* 删除主题
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278260418826.jpg)
**2.初识KafkaAdminCilent**
* 基本使用
* 主题合法性验证
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278261273097.jpg)
**3.分区的管理**
* 优先副本的选举
* 分区重分配
* 复制限流
* 修改副本因子
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278261399349.jpg)
**4.如何选择合适的分区数**
* 性能测试工具
* 分区数越多吞吐量就越高吗
* 分区数的上限
* 考量因素
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278263864594.jpg)
# 五、日志存储
**1.文件目录布局**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278264118225.jpg)
**2.日志格式的演变**
* v0版本
* v1版本
* 消息压缩
* 变长字段
* v2版本
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278265829503.jpg)
**3.日志索引**
* 偏移量索引
* 时间戳索引
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278266567472.jpg)
**4.日志清理**
* 日志删除
* 日志压缩
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278267225940.jpg)
**5.磁盘存储**
* 页缓存
* 磁盘I/O流程
* 零拷贝
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278267571690.jpg)
# 六、深入服务端
**1.协议设计**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278268884023.jpg)
**2.时间轮**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278269457390.jpg)
**3.延时操作**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278270918873.jpg)
**4.控制器**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278271472670.jpg)
**5.参数解密**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278271834956.jpg)
# 七、深入客户端
**1.分区分配策略**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278272663865.jpg)
**2.消费者协调器和组协调器**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278273504165.jpg)
**3._consumer_offsets剖析**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278273824228.jpg)
**4.事务**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278274444761.jpg)
# 八、可靠性探究
**1.副本剖析**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278275649949.jpg)
**2.日志同步机制**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278276528026.jpg)
**3.可靠性分析**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278276772600.jpg)
# 九、Kafka应用
**1.命令行工具**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278277275335.jpg)
**2.Kafka Connect**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278278959047.jpg)
**3.Kafka Mirror Maker**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278279954552.jpg)
**4.Kafka Streams**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278280974145.jpg)
# 十、Kafka监控
**1.监控数据的来源**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278281899179.jpg)
**2.消费滞后**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278282529062.jpg)
**3.同步失效分区**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278283338651.jpg)
**4.监控指标说明**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278284291459.jpg)
**5.监控模块**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278285651029.jpg)
# 十一、高级应用
**1.过期时间(TTL)**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278286126409.jpg)
**2.延时队列**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278287599386.jpg)
**3.死信队列和重试队列**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278287935809.jpg)
**4.消息路由**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278288267306.jpg)
**5.消息轨迹**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278289521649.jpg)
**6.消息审计**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278290144434.jpg)
**7.消息代理**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278291319434.jpg)
**8.消息中间件选型**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278292100012.jpg)
# 十二、Kafka与Spark的集成
**1.Spark的安装及简单应用**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278292287122.jpg)
**2.Spark编程模型**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278294879623.jpg)
**3.Spark的运行结构**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278294580065.jpg)
**4.Spark Streaming简介**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278295560612.jpg)
**5.Kafka与Spark Streaming的整合**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278296823278.jpg)
**6.Spark SQL**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278296747107.jpg)
**7.Structured Streaming**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278297299492.jpg)
**8.Kafka与Structured Streaming的整合**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278298745630.jpg)
# 总结
三个工作日收到了offer,头条面试体验还是很棒的,这次的头条面试好像每面技术都问了我算法,然后就是中间件、MySQL、Redis、Kafka、网络等等。
**如果你对下面我说的这些笔记感兴趣,可以点赞+关注后,[戳这里即可免费领取](https://docs.qq.com/doc/DSmxTbFJ1cmN1R2dB)**
* **第一个是算法**
关于算法,我觉得最好的是刷题,作死的刷的,多做多练习,加上自己的理解,还是比较容易拿下的。
而且,**我貌似是将《算法刷题LeetCode中文版》、《算法的乐趣》大概都过了一遍,尤其是这本**
**《算法刷题LeetCode中文版》总共有15个章节:编程技巧、线性表、字符串、栈和队列、树、排序、查找、暴力枚举法、广度优先搜索、深度优先搜索、分治法、贪心法、动态规划、图、细节实现题**
![最新出炉,头条三面技术四面HR,看我如何一步一步攻克面试官?](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278298116298.jpg)
**《算法的乐趣》共有23个章节:**
![最新出炉,头条三面技术四面HR,看我如何一步一步攻克面试官?](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278298436556.jpg)
![最新出炉,头条三面技术四面HR,看我如何一步一步攻克面试官?](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278299766258.jpg)
* **第二个是Redis、MySQL、kafka(给大家看下我都有哪些复习笔记)**
基本上都是面试真题解析、笔记和学习大纲图,感觉复习也就需要这些吧(个人意见)
![最新出炉,头条三面技术四面HR,看我如何一步一步攻克面试官?](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278299179252.jpg)
* **第三个是网络(给大家看一本我之前得到的《JAVA核心知识整理》包括30个章节分类,这本283页的JAVA核心知识整理还是很不错的,一次性总结了30个分享的大知识点)**
![最新出炉,头条三面技术四面HR,看我如何一步一步攻克面试官?](http://www.www.zyiz.net/i/li/?n=2&i=images/20210703/1625278300398719.jpg)
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