diff --git a/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/AnalysisServerDriver.java b/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/AnalysisServerDriver.java
index 37860944b..17447a102 100644
--- a/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/AnalysisServerDriver.java
+++ b/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/AnalysisServerDriver.java
@@ -57,10 +57,10 @@ public class AnalysisServerDriver extends Configured implements Tool {
         conf.set("hbase.zookeeper.quorum", Config.HBase.ZK_QUORUM);
         conf.set("hbase.zookeeper.property.clientPort", Config.HBase.ZK_CLIENT_PORT);
         //-XX:+UseParallelGC -XX:ParallelGCThreads=4 -XX:GCTimeRatio=10 -XX:YoungGenerationSizeIncrement=20 -XX:TenuredGenerationSizeIncrement=20 -XX:AdaptiveSizeDecrementScaleFactor=2
-        conf.set("mapred.child.java.opts",Config.MapReduce.java_opts);
+        conf.set("mapred.child.java.opts",Config.MapReduce.JAVA_OPTS);
         String[] otherArgs = new GenericOptionsParser(conf, args).getRemainingArgs();
         if (otherArgs.length != 2) {
-            System.err.println("Usage: AnalysisServer yyyy-MM-dd/HH:mm:ss yyyy-MM-dd/HH:mm:ss");
+            System.err.println("Usage: com.ai.cloud.skywalking.analysis.AnalysisServerDriver yyyy-MM-dd/HH:mm:ss yyyy-MM-dd/HH:mm:ss");
             System.exit(2);
         }
 
diff --git a/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/config/Config.java b/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/config/Config.java
index 01df2cabe..65a11b6cb 100644
--- a/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/config/Config.java
+++ b/skywalking-analysis/src/main/java/com/ai/cloud/skywalking/analysis/config/Config.java
@@ -31,6 +31,6 @@ public class Config {
     }
 
     public static class MapReduce{
-        public static String java_opts = "-Xmx200m";
+        public static String JAVA_OPTS = "-Xmx200m";
     }
 }
diff --git a/skywalking-analysis/src/test/java/com/ai/cloud/skywalking/analysis/datacheck/01.truncateHBaseTable.md b/skywalking-analysis/src/test/java/com/ai/cloud/skywalking/analysis/datacheck/01.truncateHBaseTable.md
new file mode 100644
index 000000000..6c56084ae
--- /dev/null
+++ b/skywalking-analysis/src/test/java/com/ai/cloud/skywalking/analysis/datacheck/01.truncateHBaseTable.md
@@ -0,0 +1,9 @@
+```sql
+truncate "sw-chain-1day-summary"
+truncate "sw-chain-1hour-summary"
+truncate "sw-chain-1min-summary"
+truncate "sw-chain-1month-summary"
+truncate "sw-chain-detail"
+truncate "sw-treeId-cid-mapping"
+truncate "sw-traceId-cid-mapping"
+```
\ No newline at end of file
diff --git a/skywalking-analysis/src/test/java/com/ai/cloud/skywalking/analysis/datacheck/02.scan4ColumnValue.md b/skywalking-analysis/src/test/java/com/ai/cloud/skywalking/analysis/datacheck/02.scan4ColumnValue.md
new file mode 100644
index 000000000..d3581f1de
--- /dev/null
+++ b/skywalking-analysis/src/test/java/com/ai/cloud/skywalking/analysis/datacheck/02.scan4ColumnValue.md
@@ -0,0 +1,13 @@
+* 查询某一张表中的某一列等于某一个值（比如sw-treeId-cid-mapping，sw-traceId-cid-mapping）
+
+```java
+import org.apache.hadoop.hbase.util.Bytes;
+import org.apache.hadoop.hbase.filter.SingleColumnValueFilter;
+import org.apache.hadoop.hbase.filter.BinaryComparator;
+import org.apache.hadoop.hbase.filter.CompareFilter;
+import org.apache.hadoop.hbase.filter. Filter;
+scan 'sw-chain-info', { FILTER
+=>SingleColumnValueFilter.new(Bytes.toBytes('trace_info'),Bytes.toBytes('cid'),
+CompareFilter::CompareOp.valueOf('EQUAL'),
+BinaryComparator.new(Bytes.toBytes('CID_B4CAEE3953B3C0DBD7A43656B2EEE345')))}
+```
\ No newline at end of file