集群基准性能测试

问题引入：输入端有2T的数据，问多长时间能把数据上传到集群？

假如说1个小时，那么双11时瞬间产生100T数据，服务器能顶住吗？

因此，我们需要对服务器进行压力测试，对服务器整体性能有精准把控

1）测试HDFS写性能

测试内容，向集群上传10个128M的文件

[root@hadoop102 mapreduce]$ hadoop jar /opt/module/hadoop-3.1.3/share/hadoop/mapreduce/hadoop-mapreduce-client-jobclient-3.1.3-tests.jar TestDFSIO -write -nrFiles 10 -fileSize 128MB
#-write 写测试   -nrFiles 10 写10个文件  -fileSize 128M  每个文件大小128M
2020-04-16 13:41:24,724 INFO fs.TestDFSIO: ----- TestDFSIO ----- : write
2020-04-16 13:41:24,724 INFO fs.TestDFSIO: Date & time: Thu Apr 16 13:41:24 CST 2020
2020-04-16 13:41:24,724 INFO fs.TestDFSIO:         Number of files: 10  #上传了10个文件
2020-04-16 13:41:24,725 INFO fs.TestDFSIO:  Total MBytes processed: 1280  #每个文件128M
												#吞吐量（写性能）8M/s
									#100个G需要的时间 (100*1024)/8=3.5小时
2020-04-16 13:41:24,725 INFO fs.TestDFSIO:       Throughput mb/sec: 8.88
2020-04-16 13:41:24,725 INFO fs.TestDFSIO:  Average IO rate mb/sec: 8.96
2020-04-16 13:41:24,725 INFO fs.TestDFSIO:   IO rate std deviation: 0.87
2020-04-16 13:41:24,725 INFO fs.TestDFSIO:      Test exec time sec: 67.61

2)测试读性能

测试内容，读取HDFS集群10个128M的文件

[root@hadoop102 mapreduce]$ hadoop jar /opt/module/hadoop-3.1.3/share/hadoop/mapreduce/hadoop-mapreduce-client-jobclient-3.1.3-tests.jar TestDFSIO -read -nrFiles 10 -fileSize 128MB

2020-04-16 13:43:38,857 INFO fs.TestDFSIO: ----- TestDFSIO ----- : read
2020-04-16 13:43:38,858 INFO fs.TestDFSIO:   Date & time: Thu Apr 16 13:43:38 CST 2020
2020-04-16 13:43:38,859 INFO fs.TestDFSIO:         Number of files: 10	#读取10个文件
2020-04-16 13:43:38,859 INFO fs.TestDFSIO:  Total MBytes processed: 1280  #每个文件128M 
2020-04-16 13:43:38,859 INFO fs.TestDFSIO:       Throughput mb/sec: 85.54 #吞吐量85M/s
2020-04-16 13:43:38,860 INFO fs.TestDFSIO:  Average IO rate mb/sec: 100.21  
2020-04-16 13:43:38,860 INFO fs.TestDFSIO:   IO rate std deviation: 44.37
2020-04-16 13:43:38,860 INFO fs.TestDFSIO:      Test exec time sec: 53.61

3)删除测试生成的数据

hadoop jar /opt/module/hadoop-3.1.3/share/hadoop/mapreduce/hadoop-mapreduce-client-jobclient-3.1.3-tests.jar TestDFSIO -clean

4)测试MR计算能力

机器128G内存以上才可以测试本命令

（1）使用RandomWriter来产生随机数，每个节点运行10个Map任务，每个Map产生大约1G大小的二进制随机数
[root@hadoop102 mapreduce]$ hadoop jar /opt/module/hadoop-3.1.3/share/hadoop/mapreduce/hadoop-mapreduce-examples-3.1.3.jar randomwriter random-data
（2）执行Sort程序
[root@hadoop102 mapreduce]$ hadoop jar /opt/module/hadoop-3.1.3/share/hadoop/mapreduce/hadoop-mapreduce-examples-3.1.3.jar sort random-data sorted-data
（3）验证数据是否真正排好序了
[root@hadoop102 mapreduce]$ 
hadoop jar /opt/module/hadoop-3.1.3/share/hadoop/mapreduce/hadoop-mapreduce-client-jobclient-3.1.3-tests.jar testmapredsort -sortInput random-data -sortOutput sorted-data