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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/20210707/1625614048858788.jpg)
**2.安装与配置**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614049392157.jpg)
**3.生产与消费**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614049182971.jpg)
**4.服务端参数配置**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614050936181.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/20210707/1625614051304565.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/20210707/1625614052667297.jpg)
**3.重要的生产者参数**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614052452917.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/20210707/1625614053995583.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/20210707/1625614053772850.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/20210707/1625614054549627.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/20210707/1625614055913117.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/20210707/1625614056842915.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/20210707/1625614056102282.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/20210707/1625614057908905.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/20210707/1625614058750982.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/20210707/1625614059644633.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/20210707/1625614059212321.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/20210707/1625614060588212.jpg)
# 六、深入服务端
**1.协议设计**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614060967085.jpg)
**2.时间轮**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614061870024.jpg)
**3.延时操作**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614062332045.jpg)
**4.控制器**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614062624032.jpg)
**5.参数解密**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614063458297.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/20210707/1625614064248208.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/20210707/1625614064957109.jpg)
**3._consumer_offsets剖析**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614065188680.jpg)
**4.事务**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614066662596.jpg)
# 八、可靠性探究
**1.副本剖析**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614066913792.jpg)
**2.日志同步机制**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614067868946.jpg)
**3.可靠性分析**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614068931579.jpg)
# 九、Kafka应用
**1.命令行工具**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614068132496.jpg)
**2.Kafka Connect**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614069817386.jpg)
**3.Kafka Mirror Maker**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614070199157.jpg)
**4.Kafka Streams**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614070648255.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/20210707/1625614071500017.jpg)
**2.消费滞后**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614072125237.jpg)
**3.同步失效分区**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614072937455.jpg)
**4.监控指标说明**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614073697841.jpg)
**5.监控模块**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614074122693.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/20210707/1625614074205724.jpg)
**2.延时队列**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614075734618.jpg)
**3.死信队列和重试队列**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614075510560.jpg)
**4.消息路由**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614076807225.jpg)
**5.消息轨迹**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614077259492.jpg)
**6.消息审计**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614078479117.jpg)
**7.消息代理**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614078361950.jpg)
**8.消息中间件选型**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614079540738.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/20210707/1625614079879845.jpg)
**2.Spark编程模型**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614080279126.jpg)
**3.Spark的运行结构**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614081559792.jpg)
**4.Spark Streaming简介**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614081430772.jpg)
**5.Kafka与Spark Streaming的整合**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614082943162.jpg)
**6.Spark SQL**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614082499220.jpg)
**7.Structured Streaming**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614083183456.jpg)
**8.Kafka与Structured Streaming的整合**
![image](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614083553277.jpg)
# 最后
按照上面的过程,4个月的时间刚刚好。当然Java的体系是很庞大的,还有很多更高级的技能需要掌握,但不要着急,这些完全可以放到以后工作中边用别学。
学习编程就是一个由混沌到有序的过程,所以你在学习过程中,如果一时碰到理解不了的知识点,大可不必沮丧,更不要气馁,这都是正常的不能再正常的事情了,不过是“人同此心,心同此理”的暂时而已。
“**道路是曲折的,前途是光明的**!”
![](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614083890395.jpg)
![](http://www.www.zyiz.net/i/li/?n=2&i=images/20210707/1625614084375556.jpg)
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