使用MapReduce计算框架统计CDN日志IP数、流量等数据

小鱼儿 2022-06-15 06:45 247阅读 0赞

### 写在前面 ###

前面两篇文章中，我们使用[Spark RDD][]及[Spark Streaming][] 从CDN日志中计算出了独立IP数、每个视频独立IP数、每时CDN流量，这里我们将使用MapReduce计算框架，从同样的日志中完成相同的计算，前提是要搭建好Hadoop及HDFS运行环境

### 独立IP计算 ###

#### 计算思路 ####

*  Map 在map中将每行的IP地址提取出来，并将(ip,1)输出
 *  Reduce 在reduce中相同的ip已经合并，所以只需统计出values的大小就是这个IP的数量了
    
    #### 代码 ####

public static class Map extends Mapper<LongWritable, Text, Text, IntWritable> {
        
            @Override
            protected void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException {
                String line = value.toString();
                String[] lines = line.split(" ");
                String ip = lines[0];
                context.write(new Text(ip), new IntWritable(1));
            }
        }
    
    
        public static class Reduce extends Reducer<Text, IntWritable, Text, IntWritable> {
        
            @Override
            protected void reduce(Text key, Iterable<IntWritable> values, Context context) throws IOException, InterruptedException {
                int sum = 0;
                for (IntWritable value : values) {
                    sum += value.get();
                }
                context.write(key, new IntWritable(sum));
            }
        }

### 每个视频独立IP计算 ###

#### 计算思路 ####

*  map 在map中将每行的视频及IP提出，以(id，ip)输出
 *  Reduce 在reduce中同一视频id被合并，只需统计values中不同IP的数量即可

#### 代码 ####

//从每行日志中获取视频ID
        public static IntWritable getVideoId(String line) {
            Matcher matcher = Pattern.compile("([\\d]+)\\.mp4").matcher(line);
            if (matcher.find()) {
                return new IntWritable(Integer.parseInt(matcher.group(1)));
            } else {
                return new IntWritable(0);
            }
        }
    
    
        public static class Map extends Mapper<LongWritable, Text, IntWritable, Text> {
        
            @Override
            protected void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException {
                String line = value.toString();
                String[] lines = line.split(" ");
                String ip = lines[0];
                context.write(getVideoId(line), new Text(ip));
            }
        }
    
    
        public static class Reduce extends Reducer<IntWritable, Text, IntWritable, IntWritable> {
        
            @Override
            protected void reduce(IntWritable key, Iterable<Text> values, Context context) throws IOException, InterruptedException {
                //统计出不同IP数量
                Set<Text> ips = new HashSet<Text>();
                for (Text value : values) {
                    ips.add(value);
                }
                context.write(key, new IntWritable(ips.size()));
            }
        }

### 每个小时CDN流量计算 ###

#### 计算思路 ####

*  map 将每行日志中的小时及请求大小提取出来以(hour,size)输出
 *  Reduce 将每小时的size相加，得出每小时总大小
    
    #### 代码 ####

//提取小时
        public static IntWritable getHour(String line) {
            Matcher matcher = Pattern.compile("2017:(\\d{2}):").matcher(line);
            if (matcher.find()) {
                return new IntWritable(Integer.parseInt(matcher.group(1)));
            } else {
                return new IntWritable(0);
            }
        }
        //提取大小
        public static LongWritable getHttpSize(String line) {
            Matcher matcher = Pattern.compile(" (200|206|304) ([0-9]+) ").matcher(line);
            if (matcher.find()) {
                return new LongWritable(Integer.parseInt(matcher.group(2)));
            } else {
                return new LongWritable(0);
            }
        }
    
    
        public static class Map extends Mapper<LongWritable, Text, IntWritable, LongWritable> {
        
    
            @Override
            protected void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException {
                String line = value.toString();
                context.write(getHour(line), getHttpSize(line));
            }
        }
    
    
        public static class Reduce extends Reducer<IntWritable, LongWritable, IntWritable, LongWritable> {
        
            @Override
            protected void reduce(IntWritable key, Iterable<LongWritable> values, Context context) throws IOException, InterruptedException {
                //统计每时cdn总和
                Long size = 0L;
                for (LongWritable value : values) {
                    size += value.get();
                }
                context.write(key, new LongWritable(size));
            }
        }

### 源码 ###

[http://git.oschina.net/whzhaochao/spark-learning][http_git.oschina.net_whzhaochao_spark-learning]

### 原文地址 ###

[http://blog.csdn.net/whzhaochao/article/details/72770499][http_blog.csdn.net_whzhaochao_article_details_72770499]

[Spark RDD]: http://blog.csdn.net/whzhaochao/article/details/72416956
[Spark Streaming]: http://blog.csdn.net/whzhaochao/article/details/72529351
[http_git.oschina.net_whzhaochao_spark-learning]: http://git.oschina.net/whzhaochao/spark-learning
[http_blog.csdn.net_whzhaochao_article_details_72770499]: http://blog.csdn.net/whzhaochao/article/details/72770499