test:modify testcase that deletes dataDir when starting old taosd

tests/system-test/0-others/compatibility.py

@@ -62,7 +62,7 @@ class TDTestCase:
         # os.system(f"mv {self.getBuildPath()}/build/lib/libtaos.so.1  {self.getBuildPath()}/build/lib/libtaos.so.1_bak ")
         
         packagePath = "/usr/local/src/"
-        
+        dataPath = cPath + "/../data/"
         packageName = "TDengine-server-"+  BASEVERSION + "-Linux-x64.tar.gz"
         packageTPath = packageName.split("-Linux-")[0]
         my_file = Path(f"{packagePath}/{packageName}")
@@ -71,10 +71,10 @@ class TDTestCase:
             os.system(f"cd {packagePath} &&  wget https://www.tdengine.com/assets-download/3.0/{packageName}")
         else: 
             print(f"{packageName} has been exists")
-        os.system(f"cd {packagePath} &&  tar xvf  {packageName} && cd {packageTPath} &&  ./install.sh  -e no  " )
+        os.system(f" cd {packagePath} &&  tar xvf  {packageName} && cd {packageTPath} &&  ./install.sh  -e no  " )
         tdDnodes.stop(1)
-        print(f"start taosd: nohup taosd -c {cPath} & ")
-        os.system(f" nohup taosd -c {cPath} & " )
+        print(f"start taosd: rm -rf {dataPath}/*  && nohup taosd -c {cPath} & ")
+        os.system(f"rm -rf {dataPath}/*  && nohup taosd -c {cPath} & " )
         sleep(5)
 
 
@@ -85,8 +85,8 @@ class TDTestCase:
 
 
     def run(self):
-        bPath=self.getBuildPath()
-        cPath=self.getCfgPath()
+        bPath = self.getBuildPath()
+        cPath = self.getCfgPath()
         dbname = "test"
         stb = f"{dbname}.meters"
         self.installTaosd(bPath,cPath)
@@ -94,6 +94,7 @@ class TDTestCase:
         tableNumbers=100
         recordNumbers1=100
         recordNumbers2=1000
+
         # tdsqlF=tdCom.newTdSql()
         # print(tdsqlF)
         # tdsqlF.query(f"SELECT SERVER_VERSION();")
@@ -105,6 +106,7 @@ class TDTestCase:
         # oldClientVersion=tdsqlF.queryResult[0][0]
         # tdLog.info(f"Base client version is {oldClientVersion}")
         # baseVersion = "3.0.1.8"
+
         tdLog.printNoPrefix(f"==========step1:prepare and check data in old version-{BASEVERSION}")
         tdLog.info(f" LD_LIBRARY_PATH=/usr/lib  taosBenchmark -t {tableNumbers} -n {recordNumbers1} -y  ")
         os.system(f"LD_LIBRARY_PATH=/usr/lib taosBenchmark -t {tableNumbers} -n {recordNumbers1} -y  ")