modify readme

README.md

@@ -1,7 +1,37 @@
-# 天池大赛-2018年第一届阿里云PolarDB数据库性能大赛分享
+# 天池大赛-阿里云2018年第一届PolarDB数据库性能大赛分享
 
 [天池比赛链接](https://tianchi.aliyun.com/programming/rankingList.htm?spm=5176.100067.5678.4.5efb714bzvzVTd&raceId=231689)
 
 [赛题描述](RaceRule.md)
 
-[解题分享长文]()
+[解题报告长文](http://neoremind.com/2018/12/2018_polar_race_java_rank_1_sharing)
+
+## How to build
+
+```
+cd engine_java && mvn assembly:assembly
+```
+
+## How to run
+
+默认只能在Linux上运行（因为使用了JNA的Direct I/O）。
+
+Write:
+```
+java -server -XX:-UseBiasedLocking -Xms2000m -Xmx2000m -XX:NewSize=1400m -XX:MaxMetaspaceSize=32m -XX:MaxDirectMemorySize=1G -XX:+UseG1GC -cp engine_java-0.0.1-SNAPSHOT-jar-with-dependencies.jar com.alibabacloud.polar_race.engine.common.neoremind.benchmark.BenchMark2 64 1000000 8 4096 /please/set/directory 1
+```
+
+Read:
+```
+java -server -XX:-UseBiasedLocking -Xms2000m -Xmx2000m -XX:NewSize=1400m -XX:MaxMetaspaceSize=32m -XX:MaxDirectMemorySize=1G -XX:+UseG1GC -cp engine_java-0.0.1-SNAPSHOT-jar-with-dependencies.jar com.alibabacloud.polar_race.engine.common.neoremind.benchmark.BenchMark2 64 1000000 8 4096 /please/set/directory 2
+```
+
+Range:
+```
+java -server -XX:-UseBiasedLocking -Xms2000m -Xmx2000m -XX:NewSize=1400m -XX:MaxMetaspaceSize=32m -XX:MaxDirectMemorySize=1G -XX:+UseG1GC -cp engine_java-0.0.1-SNAPSHOT-jar-with-dependencies.jar com.alibabacloud.polar_race.engine.common.neoremind.benchmark.BenchMark2 64 1000000 8 4096 /please/set/directory 2
+```
+
+Note:
+```
+64 1000000 8 4096 表示64并发，每个线程100w kv，key 8B，value 4K
+```