diff --git a/Hadoop-Benchmark.md b/Hadoop-Benchmark.md
index 31c3687..4015a89 100644
--- a/Hadoop-Benchmark.md
+++ b/Hadoop-Benchmark.md
@@ -33,6 +33,8 @@ wget https://oss.sonatype.org/service/local/repositories/releases/content/com/gi
 
 The TestDFSIO benchmark is used for measuring I/O (read/write) performance.
 
+**However, the generated data to write is all zero. SeaweedFS automatically compress this kind of data. So this is not scientific for now.**
+
 ## TestDFSIO write tests
 Start the TestDFSIO write tests:
 
@@ -40,15 +42,15 @@ Start the TestDFSIO write tests:
 bin/hadoop jar ./share/hadoop/mapreduce/hadoop-mapreduce-client-jobclient-2.10.0-tests.jar TestDFSIO -write -nrFiles 8 -fileSize 1GB -resFile /tmp/TestDFSIOwrite.txt
 
 ...
-20/07/16 13:45:25 INFO fs.TestDFSIO: ----- TestDFSIO ----- : write
-20/07/16 13:45:25 INFO fs.TestDFSIO:             Date & time: Thu Jul 16 13:45:25 PDT 2020
-20/07/16 13:45:25 INFO fs.TestDFSIO:         Number of files: 8
-20/07/16 13:45:25 INFO fs.TestDFSIO:  Total MBytes processed: 8192
-20/07/16 13:45:25 INFO fs.TestDFSIO:       Throughput mb/sec: 37.96
-20/07/16 13:45:25 INFO fs.TestDFSIO:  Average IO rate mb/sec: 38.03
-20/07/16 13:45:25 INFO fs.TestDFSIO:   IO rate std deviation: 1.68
-20/07/16 13:45:25 INFO fs.TestDFSIO:      Test exec time sec: 218.24
-20/07/16 13:45:25 INFO fs.TestDFSIO:
+20/07/17 15:57:08 INFO fs.TestDFSIO: ----- TestDFSIO ----- : write
+20/07/17 15:57:08 INFO fs.TestDFSIO:             Date & time: Fri Jul 17 15:57:08 PDT 2020
+20/07/17 15:57:08 INFO fs.TestDFSIO:         Number of files: 8
+20/07/17 15:57:08 INFO fs.TestDFSIO:  Total MBytes processed: 8192
+20/07/17 15:57:08 INFO fs.TestDFSIO:       Throughput mb/sec: 379.29
+20/07/17 15:57:08 INFO fs.TestDFSIO:  Average IO rate mb/sec: 389.95
+20/07/17 15:57:08 INFO fs.TestDFSIO:   IO rate std deviation: 74.91
+20/07/17 15:57:08 INFO fs.TestDFSIO:      Test exec time sec: 24.05
+20/07/17 15:57:08 INFO fs.TestDFSIO:
 ```
 
 ## TestDFSIO read tests
@@ -60,13 +62,13 @@ bin/hadoop jar ./share/hadoop/mapreduce/hadoop-mapreduce-client-jobclient-2.10.0
 
 ...
 
-20/07/16 13:46:57 INFO fs.TestDFSIO: ----- TestDFSIO ----- : read
-20/07/16 13:46:57 INFO fs.TestDFSIO:             Date & time: Thu Jul 16 13:46:57 PDT 2020
-20/07/16 13:46:57 INFO fs.TestDFSIO:         Number of files: 8
-20/07/16 13:46:57 INFO fs.TestDFSIO:  Total MBytes processed: 8192
-20/07/16 13:46:57 INFO fs.TestDFSIO:       Throughput mb/sec: 406.01
-20/07/16 13:46:57 INFO fs.TestDFSIO:  Average IO rate mb/sec: 406.71
-20/07/16 13:46:57 INFO fs.TestDFSIO:   IO rate std deviation: 16.61
-20/07/16 13:46:57 INFO fs.TestDFSIO:      Test exec time sec: 21.68
-20/07/16 13:46:57 INFO fs.TestDFSIO:
+20/07/17 15:59:38 INFO fs.TestDFSIO: ----- TestDFSIO ----- : read
+20/07/17 15:59:38 INFO fs.TestDFSIO:             Date & time: Fri Jul 17 15:59:38 PDT 2020
+20/07/17 15:59:38 INFO fs.TestDFSIO:         Number of files: 8
+20/07/17 15:59:38 INFO fs.TestDFSIO:  Total MBytes processed: 8192
+20/07/17 15:59:38 INFO fs.TestDFSIO:       Throughput mb/sec: 393.26
+20/07/17 15:59:38 INFO fs.TestDFSIO:  Average IO rate mb/sec: 393.72
+20/07/17 15:59:38 INFO fs.TestDFSIO:   IO rate std deviation: 13.33
+20/07/17 15:59:38 INFO fs.TestDFSIO:      Test exec time sec: 22.76
+20/07/17 15:59:38 INFO fs.TestDFSIO:
 ```
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