Updated Hadoop Benchmark (markdown)

Hadoop-Benchmark.md

@@ -71,4 +71,75 @@ bin/hadoop jar ./share/hadoop/mapreduce/hadoop-mapreduce-client-jobclient-2.10.0
 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:
-```
+```
+
+# Independent Benchmarks
+
+## Sugon (中科曙光)
+To test the performance of HDFS and SeaweedFS, we did a comparison by running 4 common spark operators, such as `count`, `group by`, `join` and `write`, for `group by` and `join` , there is a  `count` followed to act.
+
+The basic configuration information of cluster is as follows: 
+
+- HDFS：
+  + Node number: 25
+  + Total disks: 36disk  *  25node = 900disk
+  + Disk capacity: 3.7T SATA
+  + Total disk capacity: 3.19PB
+  + Replication: 5
+
+- SeaweedFS:
+
+  + Node number: 6（3+3 rack）
+  + Disk capacity: 3.7T SATA
+  + Cluster max volume: 21500
+  + Total disk capacity: 799TB
+  + Replication policy: 010
+
+Here are the details and results of our test. At the beginning of the test, we put our data to  both HDFS and SeaweedFS.  The amount of the data is 100 million records, and stored in 200 parquet files. The size of each parquet file is about 89 MB. We ran spark on yarn with 20 executors. In spark, we got two DataFrames by reading parquet from HDFS and HCFS separately, then executed `count`, `group by` and `join`  by 100 times , and `write` by 10 times, on each DataFrame.
+
+As for `count`,  SeaweedFS's advantage  is obvious. The average time of the DataFrame from HDFS is 4.05 seconds, while SeaweedFS is only 0.659. Following is the result:
+
+| Summary | HDFS  | SeaweedFS  |
+| ------- | ----- | ----- |
+| Count   | 100   | 100   |
+| Mean    | 4.050 | 0.659 |
+| Stddev  | 0.264 | 0.941 |
+| Min     | 3.678 | 0.392 |
+| Max     | 5.692 | 9.688 |
+
+
+
+As for `write`, we wrote the DataFrame from HDFS to SeaweedFS, and  wrote the DataFrame from HCFS to SeaweedFS. Following is the result:
+
+| Summary | HDFS    | SeaweedFS    |
+| ------- | ------- | ------- |
+| Count   | 10      | 10      |
+| Mean    | 234.279 | 232.078 |
+| Stddev  | 26.823  | 12.652  |
+| Min     | 216.931 | 214.349 |
+| Max     | 307.330 | 252.375 |
+
+
+
+As for `group by`, following is the result:
+
+| Summary | HDFS   | SeaweedFS   |
+| ------- | ------ | ------ |
+| Count   | 100    | 100    |
+| Mean    | 14.121 | 12.515 |
+| Stddev  | 1.972  | 1.255  |
+| Min     | 12.879 | 11.322 |
+| Max     | 32.296 | 22.573 |
+
+
+
+As for `join`, every DataFrame join with itself on one column. Following is the result:
+
+| Summary | HDFS   | SeaweedFS   |
+| ------- | ------ | ------ |
+| Count   | 100    | 100    |
+| Mean    | 25.684 | 23.897 |
+| Stddev  | 0.934  | 1.381  |
+| Min     | 24.006 | 22.275 |
+| Max     | 30.991 | 30.279 |
+