Merge branch 'develop' into feature/query

packaging/cfg/taos.cfg

@@ -270,3 +270,9 @@
 
 # in retrieve blocking model, only in 50% query threads will be used in query processing in dnode
 # retrieveBlockingModel    0
+
+# the maximum allowed query buffer size in MB during query processing for each data node
+# -1 no limit (default)
+# 0  no query allowed, queries are disabled
+# queryBufferSize         -1
+

packaging/deb/makedeb.sh

@@ -47,6 +47,9 @@ cp ${compile_dir}/../packaging/cfg/taos.cfg         ${pkg_dir}${install_home_pat
 cp ${compile_dir}/../packaging/deb/taosd            ${pkg_dir}${install_home_path}/init.d
 cp ${compile_dir}/../packaging/tools/post.sh        ${pkg_dir}${install_home_path}/script
 cp ${compile_dir}/../packaging/tools/preun.sh       ${pkg_dir}${install_home_path}/script
+cp ${compile_dir}/../packaging/tools/startPre.sh    ${pkg_dir}${install_home_path}/bin
+cp ${compile_dir}/../packaging/tools/set_core.sh    ${pkg_dir}${install_home_path}/bin
+cp ${compile_dir}/../packaging/tools/taosd-dump-cfg.gdb    ${pkg_dir}${install_home_path}/bin
 cp ${compile_dir}/build/bin/taosdemo                ${pkg_dir}${install_home_path}/bin
 cp ${compile_dir}/build/bin/taosdemox               ${pkg_dir}${install_home_path}/bin
 cp ${compile_dir}/build/bin/taosdump                ${pkg_dir}${install_home_path}/bin

packaging/rpm/tdengine.spec

@@ -55,6 +55,9 @@ cp %{_compiledir}/../packaging/cfg/taos.cfg         %{buildroot}%{homepath}/cfg
 cp %{_compiledir}/../packaging/rpm/taosd            %{buildroot}%{homepath}/init.d
 cp %{_compiledir}/../packaging/tools/post.sh        %{buildroot}%{homepath}/script
 cp %{_compiledir}/../packaging/tools/preun.sh       %{buildroot}%{homepath}/script
+cp %{_compiledir}/../packaging/tools/startPre.sh    %{buildroot}%{homepath}/bin
+cp %{_compiledir}/../packaging/tools/set_core.sh    %{buildroot}%{homepath}/bin
+cp %{_compiledir}/../packaging/tools/taosd-dump-cfg.gdb    %{buildroot}%{homepath}/bin
 cp %{_compiledir}/build/bin/taos                    %{buildroot}%{homepath}/bin
 cp %{_compiledir}/build/bin/taosd                   %{buildroot}%{homepath}/bin
 cp %{_compiledir}/build/bin/taosdemo                %{buildroot}%{homepath}/bin

packaging/tools/install.sh

@@ -604,9 +604,7 @@ function install_service_on_systemd() {
     ${csudo} bash -c "echo '[Service]'                          >> ${taosd_service_config}"
     ${csudo} bash -c "echo 'Type=simple'                        >> ${taosd_service_config}"
     ${csudo} bash -c "echo 'ExecStart=/usr/bin/taosd'           >> ${taosd_service_config}"
-    #${csudo} bash -c "echo 'ExecStartPre=/usr/local/taos/bin/setDelay.sh'     >> ${taosd_service_config}"
-    #${csudo} bash -c "echo 'ExecStartPost=/usr/local/taos/bin/resetDelay.sh'  >> ${taosd_service_config}"
-    #${csudo} bash -c "echo 'ExecStopPost=/usr/local/taos/bin/resetDelay.sh'   >> ${taosd_service_config}"
+    ${csudo} bash -c "echo 'ExecStartPre=/usr/local/taos/bin/startPre.sh'         >> ${taosd_service_config}"
     ${csudo} bash -c "echo 'LimitNOFILE=infinity'               >> ${taosd_service_config}"
     ${csudo} bash -c "echo 'LimitNPROC=infinity'                >> ${taosd_service_config}"
     ${csudo} bash -c "echo 'LimitCORE=infinity'                 >> ${taosd_service_config}"

packaging/tools/install_power.sh

@@ -578,6 +578,7 @@ function install_service_on_systemd() {
     ${csudo} bash -c "echo '[Service]'                           >> ${powerd_service_config}"
     ${csudo} bash -c "echo 'Type=simple'                         >> ${powerd_service_config}"
     ${csudo} bash -c "echo 'ExecStart=/usr/bin/powerd'           >> ${powerd_service_config}"
+    ${csudo} bash -c "echo 'ExecStartPre=/usr/local/power/bin/startPre.sh'           >> ${powerd_service_config}"
     ${csudo} bash -c "echo 'LimitNOFILE=infinity'                >> ${powerd_service_config}"
     ${csudo} bash -c "echo 'LimitNPROC=infinity'                 >> ${powerd_service_config}"
     ${csudo} bash -c "echo 'LimitCORE=infinity'                  >> ${powerd_service_config}"

packaging/tools/make_install.sh

@@ -149,10 +149,12 @@ function install_bin() {
     ${csudo} rm -f ${bin_link_dir}/rmtaos       || :
 
     ${csudo} cp -r ${binary_dir}/build/bin/* ${install_main_dir}/bin
+    ${csudo} cp -r ${script_dir}/taosd-dump-cfg.gdb   ${install_main_dir}/bin
 
     if [ "$osType" != "Darwin" ]; then
-        ${csudo} cp -r ${script_dir}/remove.sh   ${install_main_dir}/bin
+        ${csudo} cp -r ${script_dir}/remove.sh     ${install_main_dir}/bin
         ${csudo} cp -r ${script_dir}/set_core.sh   ${install_main_dir}/bin
+        ${csudo} cp -r ${script_dir}/startPre.sh   ${install_main_dir}/bin
     else
         ${csudo} cp -r ${script_dir}/remove_client.sh   ${install_main_dir}/bin
     fi
@@ -330,6 +332,7 @@ function install_service_on_systemd() {
     ${csudo} bash -c "echo '[Service]'                          >> ${taosd_service_config}"
     ${csudo} bash -c "echo 'Type=simple'                        >> ${taosd_service_config}"
     ${csudo} bash -c "echo 'ExecStart=/usr/bin/taosd'           >> ${taosd_service_config}"
+    ${csudo} bash -c "echo 'ExecStartPre=/usr/local/taos/bin/startPre.sh'           >> ${taosd_service_config}"
     ${csudo} bash -c "echo 'LimitNOFILE=infinity'               >> ${taosd_service_config}"
     ${csudo} bash -c "echo 'LimitNPROC=infinity'                >> ${taosd_service_config}"
     ${csudo} bash -c "echo 'LimitCORE=infinity'                 >> ${taosd_service_config}"

packaging/tools/makeclient.sh

@@ -45,7 +45,8 @@ if [ "$osType" != "Darwin" ]; then
     strip ${build_dir}/bin/taos
     bin_files="${build_dir}/bin/taos ${script_dir}/remove_client.sh"
   else  
-    bin_files="${build_dir}/bin/taos ${build_dir}/bin/taosdump ${build_dir}/bin/taosdemo ${build_dir}/bin/taosdemox ${script_dir}/remove_client.sh ${script_dir}/set_core.sh ${script_dir}/get_client.sh"
+    bin_files="${build_dir}/bin/taos ${build_dir}/bin/taosdump ${build_dir}/bin/taosdemo ${build_dir}/bin/taosdemox\
+               ${script_dir}/remove_client.sh ${script_dir}/set_core.sh ${script_dir}/get_client.sh ${script_dir}/taosd-dump-cfg.gdb"
   fi
   lib_files="${build_dir}/lib/libtaos.so.${version}"
 else

packaging/tools/makeclient_power.sh

@@ -81,6 +81,7 @@ if [ "$osType" != "Darwin" ]; then
     cp ${build_dir}/bin/taosdump      ${install_dir}/bin/powerdump  
     cp ${script_dir}/set_core.sh      ${install_dir}/bin
     cp ${script_dir}/get_client.sh    ${install_dir}/bin
+    cp ${script_dir}/taosd-dump-cfg.gdb    ${install_dir}/bin
   fi
 else
   cp ${bin_files} ${install_dir}/bin

packaging/tools/makepkg.sh

@@ -36,7 +36,8 @@ if [ "$pagMode" == "lite" ]; then
   strip ${build_dir}/bin/taos
   bin_files="${build_dir}/bin/taosd ${build_dir}/bin/taos ${script_dir}/remove.sh"
 else 
-  bin_files="${build_dir}/bin/taosd ${build_dir}/bin/taos ${build_dir}/bin/taosdump ${build_dir}/bin/taosdemo ${build_dir}/bin/taosdemox ${build_dir}/bin/tarbitrator ${script_dir}/remove.sh ${script_dir}/set_core.sh ${script_dir}/get_client.sh"
+  bin_files="${build_dir}/bin/taosd ${build_dir}/bin/taos ${build_dir}/bin/taosdump ${build_dir}/bin/taosdemo ${build_dir}/bin/taosdemox ${build_dir}/bin/tarbitrator\
+             ${script_dir}/remove.sh ${script_dir}/set_core.sh ${script_dir}/startPre.sh  ${script_dir}/taosd-dump-cfg.gdb"
 fi
 
 lib_files="${build_dir}/lib/libtaos.so.${version}"

packaging/tools/makepkg_power.sh

@@ -36,7 +36,8 @@ fi
 #  strip ${build_dir}/bin/taos
 #  bin_files="${build_dir}/bin/powerd ${build_dir}/bin/power ${script_dir}/remove_power.sh"
 #else 
-#  bin_files="${build_dir}/bin/powerd ${build_dir}/bin/power ${build_dir}/bin/powerdemo ${build_dir}/bin/tarbitrator ${script_dir}/remove_power.sh ${script_dir}/set_core.sh"
+#  bin_files="${build_dir}/bin/powerd ${build_dir}/bin/power ${build_dir}/bin/powerdemo ${build_dir}/bin/tarbitrator ${script_dir}/remove_power.sh\
+#              ${script_dir}/set_core.sh ${script_dir}/startPre.sh  ${script_dir}/taosd-dump-cfg.gdb"
 #fi
 
 lib_files="${build_dir}/lib/libtaos.so.${version}"
@@ -82,6 +83,8 @@ else
   cp ${build_dir}/bin/tarbitrator   ${install_dir}/bin
   cp ${script_dir}/set_core.sh      ${install_dir}/bin
   cp ${script_dir}/get_client.sh    ${install_dir}/bin
+  cp ${script_dir}/startPre.sh      ${install_dir}/bin
+  cp ${script_dir}/taosd-dump-cfg.gdb  ${install_dir}/bin
 fi
 chmod a+x ${install_dir}/bin/* || :
 

packaging/tools/post.sh

@@ -406,6 +406,7 @@ function install_service_on_systemd() {
     ${csudo} bash -c "echo '[Service]'                          >> ${taosd_service_config}"
     ${csudo} bash -c "echo 'Type=simple'                        >> ${taosd_service_config}"
     ${csudo} bash -c "echo 'ExecStart=/usr/bin/taosd'           >> ${taosd_service_config}"
+    ${csudo} bash -c "echo 'ExecStartPre=/usr/local/taos/bin/startPre.sh'           >> ${taosd_service_config}"
     ${csudo} bash -c "echo 'LimitNOFILE=infinity'               >> ${taosd_service_config}"
     ${csudo} bash -c "echo 'LimitNPROC=infinity'                >> ${taosd_service_config}"
     ${csudo} bash -c "echo 'LimitCORE=infinity'                 >> ${taosd_service_config}"

packaging/tools/startPre.sh

+#!/bin/bash
+#
+# if enable core dump, set start count to 3, disable core dump, set start count to 20.
+# set -e
+# set -x
+
+taosd=/etc/systemd/system/taosd.service
+line=`grep StartLimitBurst ${taosd}`
+num=${line##*=}
+#echo "burst num: ${num}"
+
+startSeqFile=/usr/local/taos/.startSeq
+recordFile=/usr/local/taos/.startRecord
+
+startSeq=0
+
+if [[ ! -e ${startSeqFile} ]]; then
+  startSeq=0
+else
+  startSeq=$(cat ${startSeqFile})
+fi
+   
+nextSeq=`expr $startSeq + 1`
+echo "${nextSeq}" > ${startSeqFile}
+
+curTime=$(date "+%Y-%m-%d %H:%M:%S")
+echo "startSeq:${startSeq} startPre.sh exec ${curTime}, burstCnt:${num}" >> ${recordFile}
+
+
+coreFlag=`ulimit -c`
+echo "coreFlag: ${coreFlag}" >> ${recordFile}
+
+if [ ${coreFlag} = "0" ];then
+  #echo "core is 0"
+  if [ ${num} != "20" ];then
+    sed -i "s/^.*StartLimitBurst.*$/StartLimitBurst=20/" ${taosd}
+    systemctl daemon-reload
+    echo "modify burst count from ${num} to 20" >> ${recordFile}
+  fi
+fi
+
+if [ ${coreFlag} = "unlimited" ];then
+  #echo "core is unlimited"
+  if [ ${num} != "3" ];then
+    sed -i "s/^.*StartLimitBurst.*$/StartLimitBurst=3/" ${taosd}
+    systemctl daemon-reload
+    echo "modify burst count from ${num} to 3" >> ${recordFile}
+  fi
+fi
+

src/client/inc/tsclient.h

@@ -299,6 +299,11 @@ typedef struct {
   struct SLocalMerger  *pLocalMerger;
 } SSqlRes;
 
+typedef struct {
+  char         key[512]; 
+  void         *pDnodeConn; 
+} SRpcObj;
+
 typedef struct STscObj {
   void *             signature;
   void *             pTimer;
@@ -314,8 +319,8 @@ typedef struct STscObj {
   int64_t            hbrid;
   struct SSqlObj *   sqlList;
   struct SSqlStream *streamList;
-  SRpcCorEpSet       *tscCorMgmtEpSet;
-  void*              pDnodeConn;
+  SRpcObj           *pRpcObj;
+  SRpcCorEpSet      *tscCorMgmtEpSet;
   pthread_mutex_t    mutex;
   int32_t            numOfObj; // number of sqlObj from this tscObj
 } STscObj;
@@ -392,8 +397,10 @@ typedef struct SSqlStream {
 
 void tscSetStreamDestTable(SSqlStream* pStream, const char* dstTable);
 
-int32_t tscInitRpc(const char *user, const char *secret, void** pDnodeConn);
-void    tscInitMsgsFp();
+
+int  tscAcquireRpc(const char *key, const char *user, const char *secret,void **pRpcObj);
+void tscReleaseRpc(void *param);
+void tscInitMsgsFp();
 
 int tsParseSql(SSqlObj *pSql, bool initial);
 

src/client/src/tscSQLParser.c

@@ -5397,6 +5397,7 @@ int32_t validateColumnName(char* name) {
 
   if (token.type == TK_STRING) {
     strdequote(token.z);
+    strntolower(token.z, token.z, token.n);
     token.n = (uint32_t)strtrim(token.z);
 
     int32_t k = tSQLGetToken(token.z, &token.type);

src/client/src/tscServer.c

@@ -157,13 +157,16 @@ void tscProcessHeartBeatRsp(void *param, TAOS_RES *tres, int code) {
     SRpcEpSet     *epSet = &pRsp->epSet;
     if (epSet->numOfEps > 0) {
       tscEpSetHtons(epSet);
-      if (!tscEpSetIsEqual(&pSql->pTscObj->tscCorMgmtEpSet->epSet, epSet)) {
-        tscTrace("%p updating epset: numOfEps: %d, inUse: %d", pSql, epSet->numOfEps, epSet->inUse);
-        for (int8_t i = 0; i < epSet->numOfEps; i++) {
-          tscTrace("endpoint %d: fqdn=%s, port=%d", i, epSet->fqdn[i], epSet->port[i]);
-        }
-        tscUpdateMgmtEpSet(pSql, epSet);
-      }
+
+      //SRpcCorEpSet *pCorEpSet = pSql->pTscObj->tscCorMgmtEpSet;
+      //if (!tscEpSetIsEqual(&pCorEpSet->epSet, epSet)) {
+      //  tscTrace("%p updating epset: numOfEps: %d, inUse: %d", pSql, epSet->numOfEps, epSet->inUse);
+      //  for (int8_t i = 0; i < epSet->numOfEps; i++) {
+      //    tscTrace("endpoint %d: fqdn=%s, port=%d", i, epSet->fqdn[i], epSet->port[i]);
+      //  }
+      //}
+      //concurrency problem, update mgmt epset anyway 
+      tscUpdateMgmtEpSet(pSql, epSet);
     }
 
     pSql->pTscObj->connId = htonl(pRsp->connId);
@@ -270,7 +273,8 @@ int tscSendMsgToServer(SSqlObj *pSql) {
       .code    = 0
   };
 
-  rpcSendRequest(pObj->pDnodeConn, &pSql->epSet, &rpcMsg, &pSql->rpcRid);
+  
+  rpcSendRequest(pObj->pRpcObj->pDnodeConn, &pSql->epSet, &rpcMsg, &pSql->rpcRid);
   return TSDB_CODE_SUCCESS;
 }
 
@@ -292,8 +296,8 @@ void tscProcessMsgFromServer(SRpcMsg *rpcMsg, SRpcEpSet *pEpSet) {
   if (pObj->signature != pObj) {
     tscDebug("%p DB connection is closed, cmd:%d pObj:%p signature:%p", pSql, pCmd->command, pObj, pObj->signature);
 
-    taosRemoveRef(tscObjRef, pSql->self);
-    taosReleaseRef(tscObjRef, pSql->self);
+    taosRemoveRef(tscObjRef, handle);
+    taosReleaseRef(tscObjRef, handle);
     rpcFreeCont(rpcMsg->pCont);
     return;
   }
@@ -303,8 +307,8 @@ void tscProcessMsgFromServer(SRpcMsg *rpcMsg, SRpcEpSet *pEpSet) {
     tscDebug("%p sqlObj needs to be released or DB connection is closed, cmd:%d type:%d, pObj:%p signature:%p",
         pSql, pCmd->command, pQueryInfo->type, pObj, pObj->signature);
 
-    taosRemoveRef(tscObjRef, pSql->self);
-    taosReleaseRef(tscObjRef, pSql->self);
+    taosRemoveRef(tscObjRef, handle);
+    taosReleaseRef(tscObjRef, handle);
     rpcFreeCont(rpcMsg->pCont);
     return;
   }
@@ -350,7 +354,7 @@ void tscProcessMsgFromServer(SRpcMsg *rpcMsg, SRpcEpSet *pEpSet) {
 
       // if there is an error occurring, proceed to the following error handling procedure.
       if (rpcMsg->code == TSDB_CODE_TSC_ACTION_IN_PROGRESS) {
-        taosReleaseRef(tscObjRef, pSql->self);
+        taosReleaseRef(tscObjRef, handle);
         rpcFreeCont(rpcMsg->pCont);
         return;
       }
@@ -418,13 +422,15 @@ void tscProcessMsgFromServer(SRpcMsg *rpcMsg, SRpcEpSet *pEpSet) {
     (*pSql->fp)(pSql->param, pSql, rpcMsg->code);
   }
 
-  taosReleaseRef(tscObjRef, pSql->self);
+  
 
   if (shouldFree) { // in case of table-meta/vgrouplist query, automatically free it
-    taosRemoveRef(tscObjRef, pSql->self);
+    taosRemoveRef(tscObjRef, handle);
     tscDebug("%p sqlObj is automatically freed", pSql); 
   }
 
+  taosReleaseRef(tscObjRef, handle);
+
   rpcFreeCont(rpcMsg->pCont);
 }
 

src/client/src/tscSql.c

@@ -90,9 +90,11 @@ static SSqlObj *taosConnectImpl(const char *ip, const char *user, const char *pa
   } else {
     if (tscSetMgmtEpSetFromCfg(tsFirst, tsSecond, &corMgmtEpSet) < 0) return NULL;
   }
+  char rpcKey[512] = {0};
+  snprintf(rpcKey, sizeof(rpcKey), "%s:%s:%s:%d", user, pass, ip, port);
  
-  void *pDnodeConn = NULL;
-  if (tscInitRpc(user, secretEncrypt, &pDnodeConn) != 0) {
+  void *pRpcObj = NULL;
+  if (tscAcquireRpc(rpcKey, user, secretEncrypt, &pRpcObj) != 0) {
     terrno = TSDB_CODE_RPC_NETWORK_UNAVAIL;
     return NULL;
   }
@@ -100,23 +102,21 @@ static SSqlObj *taosConnectImpl(const char *ip, const char *user, const char *pa
   STscObj *pObj = (STscObj *)calloc(1, sizeof(STscObj));
   if (NULL == pObj) {
     terrno = TSDB_CODE_TSC_OUT_OF_MEMORY;
-    rpcClose(pDnodeConn);
+    tscReleaseRpc(pRpcObj);
     return NULL;
   }
-  // set up tscObj's mgmtEpSet
-  pObj->tscCorMgmtEpSet = (SRpcCorEpSet *)malloc(sizeof(SRpcCorEpSet));
-  if (NULL == pObj->tscCorMgmtEpSet) {
+
+  pObj->tscCorMgmtEpSet = malloc(sizeof(SRpcCorEpSet));
+  if (pObj->tscCorMgmtEpSet == NULL) {
     terrno = TSDB_CODE_TSC_OUT_OF_MEMORY;
-    rpcClose(pDnodeConn);
-    free(pObj->tscCorMgmtEpSet);
+    tscReleaseRpc(pRpcObj);
     free(pObj);
     return NULL;
   }
-  memcpy(pObj->tscCorMgmtEpSet, &corMgmtEpSet, sizeof(SRpcCorEpSet));
-
-  pObj->signature = pObj;
-  pObj->pDnodeConn = pDnodeConn;
+  memcpy(pObj->tscCorMgmtEpSet, &corMgmtEpSet, sizeof(corMgmtEpSet));
   
+  pObj->signature = pObj;
+  pObj->pRpcObj = (SRpcObj *)pRpcObj;
   tstrncpy(pObj->user, user, sizeof(pObj->user));
   secretEncryptLen = MIN(secretEncryptLen, sizeof(pObj->pass));
   memcpy(pObj->pass, secretEncrypt, secretEncryptLen);
@@ -126,8 +126,7 @@ static SSqlObj *taosConnectImpl(const char *ip, const char *user, const char *pa
     /* db name is too long */
     if (len >= TSDB_DB_NAME_LEN) {
       terrno = TSDB_CODE_TSC_INVALID_DB_LENGTH;
-      rpcClose(pDnodeConn);
-      free(pObj->tscCorMgmtEpSet);
+      tscReleaseRpc(pRpcObj);
       free(pObj);
       return NULL;
     }
@@ -144,8 +143,7 @@ static SSqlObj *taosConnectImpl(const char *ip, const char *user, const char *pa
   SSqlObj *pSql = (SSqlObj *)calloc(1, sizeof(SSqlObj));
   if (NULL == pSql) {
     terrno = TSDB_CODE_TSC_OUT_OF_MEMORY;
-    rpcClose(pDnodeConn);
-    free(pObj->tscCorMgmtEpSet);
+    tscReleaseRpc(pRpcObj);
     free(pObj);
     return NULL;
   }
@@ -161,9 +159,8 @@ static SSqlObj *taosConnectImpl(const char *ip, const char *user, const char *pa
 
   if (TSDB_CODE_SUCCESS != tscAllocPayload(&pSql->cmd, TSDB_DEFAULT_PAYLOAD_SIZE)) {
     terrno = TSDB_CODE_TSC_OUT_OF_MEMORY;
-    rpcClose(pDnodeConn);
+    tscReleaseRpc(pRpcObj);
     free(pSql);
-    free(pObj->tscCorMgmtEpSet);
     free(pObj);
     return NULL;
   }
@@ -202,7 +199,7 @@ TAOS *taos_connect_internal(const char *ip, const char *user, const char *pass,
       return NULL;
     }
     
-    tscDebug("%p DB connection is opening, dnodeConn:%p", pObj, pObj->pDnodeConn);
+    tscDebug("%p DB connection is opening, rpcObj: %p, dnodeConn:%p", pObj, pObj->pRpcObj, pObj->pRpcObj->pDnodeConn);
     taos_free_result(pSql);
   
     // version compare only requires the first 3 segments of the version string
@@ -279,7 +276,7 @@ void taos_close(TAOS *taos) {
     return;
   }
 
-  tscDebug("%p try to free tscObj and close dnodeConn:%p", pObj, pObj->pDnodeConn);
+  tscDebug("%p try to free tscObj", pObj);
   if (pObj->signature != pObj) {
     tscDebug("%p already closed or invalid tscObj", pObj);
     return;
@@ -303,7 +300,7 @@ void taos_close(TAOS *taos) {
     }
   }
 
-  tscDebug("%p all sqlObj are freed, free tscObj and close dnodeConn:%p", pObj, pObj->pDnodeConn);
+  tscDebug("%p all sqlObj are freed, free tscObj", pObj);
   taosRemoveRef(tscRefId, pObj->rid);
 }
 

src/client/src/tscSystem.c

@@ -43,41 +43,74 @@ void      *tscTmr;
 void      *tscQhandle;
 int32_t    tscRefId = -1;
 int32_t    tscNumOfObj = 0;         // number of sqlObj in current process.
-
 static void  *tscCheckDiskUsageTmr;
+void      *tscRpcCache;            // cache to keep rpc obj
+int32_t   tscNumOfThreads = 1;     // num of rpc threads  
+static    pthread_mutex_t rpcObjMutex; // mutex to protect open the rpc obj concurrently 
 static pthread_once_t tscinit = PTHREAD_ONCE_INIT;
 
 void tscCheckDiskUsage(void *UNUSED_PARAM(para), void* UNUSED_PARAM(param)) {
   taosGetDisk();
   taosTmrReset(tscCheckDiskUsage, 1000, NULL, tscTmr, &tscCheckDiskUsageTmr);
 }
+void tscFreeRpcObj(void *param) {
+  assert(param);
+  SRpcObj *pRpcObj = (SRpcObj *)(param);
+  tscDebug("free rpcObj:%p and free pDnodeConn: %p", pRpcObj, pRpcObj->pDnodeConn);
+  rpcClose(pRpcObj->pDnodeConn);
+}
 
-int32_t tscInitRpc(const char *user, const char *secretEncrypt, void **pDnodeConn) {
-  SRpcInit rpcInit;
-
-  if (*pDnodeConn == NULL) {
-    memset(&rpcInit, 0, sizeof(rpcInit));
-    rpcInit.localPort = 0;
-    rpcInit.label = "TSC";
-    rpcInit.numOfThreads = 1;  // every DB connection has only one thread
-    rpcInit.cfp = tscProcessMsgFromServer;
-    rpcInit.sessions = tsMaxConnections;
-    rpcInit.connType = TAOS_CONN_CLIENT;
-    rpcInit.user = (char *)user;
-    rpcInit.idleTime = 2000;
-    rpcInit.ckey = "key";
-    rpcInit.spi = 1;
-    rpcInit.secret = (char *)secretEncrypt;
-
-    *pDnodeConn = rpcOpen(&rpcInit);
-    if (*pDnodeConn == NULL) {
-      tscError("failed to init connection to TDengine");
-      return -1;
-    } else {
-      tscDebug("dnodeConn:%p is created, user:%s", *pDnodeConn, user);
-    }
+void tscReleaseRpc(void *param)  {
+  if (param == NULL) {
+    return;
   }
+  pthread_mutex_lock(&rpcObjMutex);
+  taosCacheRelease(tscRpcCache, (void *)&param, false); 
+  pthread_mutex_unlock(&rpcObjMutex);
+} 
 
+int32_t tscAcquireRpc(const char *key, const char *user, const char *secretEncrypt, void **ppRpcObj) {
+  pthread_mutex_lock(&rpcObjMutex);
+
+  SRpcObj *pRpcObj = (SRpcObj *)taosCacheAcquireByKey(tscRpcCache, key, strlen(key));
+  if (pRpcObj != NULL) {
+    *ppRpcObj = pRpcObj;   
+    pthread_mutex_unlock(&rpcObjMutex);
+    return 0;
+  } 
+
+  SRpcInit rpcInit;
+  memset(&rpcInit, 0, sizeof(rpcInit));
+  rpcInit.localPort = 0;
+  rpcInit.label = "TSC";
+  rpcInit.numOfThreads = tscNumOfThreads * 2;    
+  rpcInit.cfp = tscProcessMsgFromServer;
+  rpcInit.sessions = tsMaxConnections;
+  rpcInit.connType = TAOS_CONN_CLIENT;
+  rpcInit.user = (char *)user;
+  rpcInit.idleTime = 2000; 
+  rpcInit.ckey = "key"; 
+  rpcInit.spi = 1; 
+  rpcInit.secret = (char *)secretEncrypt;
+
+  SRpcObj rpcObj;
+  memset(&rpcObj, 0, sizeof(rpcObj));
+  strncpy(rpcObj.key, key, strlen(key));
+  rpcObj.pDnodeConn = rpcOpen(&rpcInit);
+  if (rpcObj.pDnodeConn == NULL) {
+    pthread_mutex_unlock(&rpcObjMutex);
+    tscError("failed to init connection to TDengine");
+    return -1;
+  } 
+  pRpcObj = taosCachePut(tscRpcCache, rpcObj.key, strlen(rpcObj.key), &rpcObj, sizeof(rpcObj), 1000*10);   
+  if (pRpcObj == NULL) {
+    rpcClose(rpcObj.pDnodeConn);
+    pthread_mutex_unlock(&rpcObjMutex);
+    return -1;
+  } 
+
+  *ppRpcObj  = pRpcObj;
+  pthread_mutex_unlock(&rpcObjMutex);
   return 0;
 }
 
@@ -118,7 +151,7 @@ void taos_init_imp(void) {
   int queueSize = tsMaxConnections*2;
 
   double factor = (tscEmbedded == 0)? 2.0:4.0;
-  int32_t tscNumOfThreads = (int)(tsNumOfCores * tsNumOfThreadsPerCore / factor);
+  tscNumOfThreads = (int)(tsNumOfCores * tsNumOfThreadsPerCore / factor);
   if (tscNumOfThreads < 2) {
     tscNumOfThreads = 2;
   }
@@ -140,6 +173,10 @@ void taos_init_imp(void) {
     tscTableMetaInfo = taosHashInit(1024, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY), true, HASH_ENTRY_LOCK);
     tscDebug("TableMeta:%p", tscTableMetaInfo);
   }
+   
+  int refreshTime = 5;
+  tscRpcCache = taosCacheInit(TSDB_DATA_TYPE_BINARY, refreshTime, true, tscFreeRpcObj, "rpcObj");
+  pthread_mutex_init(&rpcObjMutex, NULL);
 
   tscRefId = taosOpenRef(200, tscCloseTscObj);
 
@@ -181,10 +218,16 @@ void taos_cleanup(void) {
   taosCleanupKeywordsTable();
   taosCloseLog();
 
-  if (tscEmbedded == 0) {
-    rpcCleanup();
+  p = tscRpcCache; 
+  tscRpcCache = NULL;
+  
+  if (p != NULL) {
+    taosCacheCleanup(p); 
+    pthread_mutex_destroy(&rpcObjMutex);
   }
 
+  if (tscEmbedded == 0) rpcCleanup();
+
   p = tscTmr;
   tscTmr = NULL;
   taosTmrCleanUp(p);

src/client/src/tscUtil.c

@@ -32,6 +32,14 @@
 static void freeQueryInfoImpl(SQueryInfo* pQueryInfo);
 static void clearAllTableMetaInfo(SQueryInfo* pQueryInfo);
 
+static void tscStrToLower(char *str, int32_t n) {
+  if (str == NULL || n <= 0) { return;}
+  for (int32_t i = 0; i < n; i++) {
+    if (str[i] >= 'A' && str[i] <= 'Z') {
+        str[i] -= ('A' - 'a');
+    }
+  }
+}
 SCond* tsGetSTableQueryCond(STagCond* pTagCond, uint64_t uid) {
   if (pTagCond->pCond == NULL) {
     return NULL;
@@ -442,7 +450,6 @@ void tscFreeRegisteredSqlObj(void *pSql) {
 
   SSqlObj* p = *(SSqlObj**)pSql;
   STscObj* pTscObj = p->pTscObj;
-
   assert(RID_VALID(p->self));
 
   int32_t num   = atomic_sub_fetch_32(&pTscObj->numOfObj, 1);
@@ -893,16 +900,10 @@ void tscCloseTscObj(void *param) {
   pObj->signature = NULL;
   taosTmrStopA(&(pObj->pTimer));
 
-  void* p = pObj->pDnodeConn;
-  if (pObj->pDnodeConn != NULL) {
-    rpcClose(pObj->pDnodeConn);
-    pObj->pDnodeConn = NULL;
-  }
-
   tfree(pObj->tscCorMgmtEpSet);
+  tscReleaseRpc(pObj->pRpcObj);
   pthread_mutex_destroy(&pObj->mutex);
 
-  tscDebug("%p DB connection is closed, dnodeConn:%p", pObj, p);
   tfree(pObj);
 }
 
@@ -1431,9 +1432,11 @@ int32_t tscValidateName(SStrToken* pToken) {
   char* sep = strnchr(pToken->z, TS_PATH_DELIMITER[0], pToken->n, true);
   if (sep == NULL) {  // single part
     if (pToken->type == TK_STRING) {
+       
       strdequote(pToken->z);
+      tscStrToLower(pToken->z, pToken->n);
       pToken->n = (uint32_t)strtrim(pToken->z);
-
+       
       int len = tSQLGetToken(pToken->z, &pToken->type);
 
       // single token, validate it
@@ -1485,7 +1488,7 @@ int32_t tscValidateName(SStrToken* pToken) {
     if (pToken->type == TK_STRING && validateQuoteToken(pToken) != TSDB_CODE_SUCCESS) {
       return TSDB_CODE_TSC_INVALID_SQL;
     }
-
+    
     // re-build the whole name string
     if (pStr[firstPartLen] == TS_PATH_DELIMITER[0]) {
       // first part do not have quote do nothing
@@ -1497,6 +1500,8 @@ int32_t tscValidateName(SStrToken* pToken) {
     }
     pToken->n += (firstPartLen + sizeof(TS_PATH_DELIMITER[0]));
     pToken->z = pStr;
+
+    tscStrToLower(pToken->z,pToken->n);
   }
 
   return TSDB_CODE_SUCCESS;

src/common/inc/tglobal.h

@@ -57,7 +57,8 @@ extern int32_t  tsCompressMsgSize;
 extern char     tsTempDir[];
 
 //query buffer management
-extern int32_t  tsQueryBufferSize;      // maximum allowed usage buffer for each data node during query processing
+extern int32_t  tsQueryBufferSize;      // maximum allowed usage buffer size in MB for each data node during query processing
+extern int64_t  tsQueryBufferSizeBytes; // maximum allowed usage buffer size in byte for each data node during query processing
 extern int32_t  tsRetrieveBlockingModel;// retrieve threads will be blocked
 
 extern int8_t   tsKeepOriginalColumnName;

src/common/src/tglobal.c

@@ -105,6 +105,7 @@ int64_t tsMaxRetentWindow = 24 * 3600L;  // maximum time window tolerance
 // 0  no query allowed, queries are disabled
 // positive value (in MB)
 int32_t tsQueryBufferSize = -1;
+int64_t tsQueryBufferSizeBytes = -1;
 
 // in retrieve blocking model, the retrieve threads will wait for the completion of the query processing.
 int32_t tsRetrieveBlockingModel = 0;
@@ -283,7 +284,7 @@ bool taosCfgDynamicOptions(char *msg) {
     int32_t cfgLen = (int32_t)strlen(cfg->option);
     if (cfgLen != olen) continue;
     if (strncasecmp(option, cfg->option, olen) != 0) continue;
-    if (cfg->valType != TAOS_CFG_VTYPE_INT32) {
+    if (cfg->valType == TAOS_CFG_VTYPE_INT32) {
       *((int32_t *)cfg->ptr) = vint;
     } else {
       *((int8_t *)cfg->ptr) = (int8_t)vint;
@@ -1488,6 +1489,10 @@ int32_t taosCheckGlobalCfg() {
   tsSyncPort = tsServerPort + TSDB_PORT_SYNC;
   tsHttpPort = tsServerPort + TSDB_PORT_HTTP;
 
+  if (tsQueryBufferSize >= 0) {
+    tsQueryBufferSizeBytes = tsQueryBufferSize * 1048576UL;
+  }
+
   taosPrintGlobalCfg();
 
   return 0;

src/common/src/ttypes.c

@@ -632,7 +632,7 @@ int32_t tStrToInteger(const char* z, int16_t type, int32_t n, int64_t* value, bo
   }
 
   // the string may be overflow according to errno
-  *value = issigned? strtoll(z, &endPtr, radix):strtoul(z, &endPtr, radix);
+  *value = issigned? strtoll(z, &endPtr, radix):strtoull(z, &endPtr, radix);
 
   // not a valid integer number, return error
   if (endPtr - z != n || errno == ERANGE) {

src/cq/src/cqMain.c

@@ -50,10 +50,13 @@ typedef struct {
   void    *dbConn;
   void    *tmrCtrl;
   pthread_mutex_t mutex;
+  int32_t delete;
+  int32_t cqObjNum;
 } SCqContext;
 
 typedef struct SCqObj {
   tmr_h          tmrId;
+  int64_t        rid;
   uint64_t       uid;
   int32_t        tid;      // table ID
   int32_t        rowSize;  // bytes of a row
@@ -69,6 +72,84 @@ typedef struct SCqObj {
 static void cqProcessStreamRes(void *param, TAOS_RES *tres, TAOS_ROW row); 
 static void cqCreateStream(SCqContext *pContext, SCqObj *pObj);
 
+int32_t    cqObjRef = -1;
+
+void cqRmFromList(SCqObj *pObj) {
+  //LOCK in caller
+
+  SCqContext *pContext = pObj->pContext;
+
+  if (pObj->prev) {
+    pObj->prev->next = pObj->next;
+  } else {
+    pContext->pHead = pObj->next;
+  }
+
+  if (pObj->next) {
+    pObj->next->prev = pObj->prev;
+  }
+
+}
+
+void cqFree(void *handle) {
+  if (tsEnableStream == 0) {
+    return;
+  }
+  SCqObj *pObj = handle;
+  SCqContext *pContext = pObj->pContext;
+  int32_t delete = 0;
+
+  pthread_mutex_lock(&pContext->mutex);
+  
+  // free the resources associated
+  if (pObj->pStream) {
+    taos_close_stream(pObj->pStream);
+    pObj->pStream = NULL;
+  } else {
+    taosTmrStop(pObj->tmrId);
+    pObj->tmrId = 0;
+  }
+
+  cInfo("vgId:%d, id:%d CQ:%s is dropped", pContext->vgId, pObj->tid, pObj->sqlStr); 
+  tdFreeSchema(pObj->pSchema);
+  free(pObj->dstTable);
+  free(pObj->sqlStr);
+  free(pObj);
+
+  pContext->cqObjNum--;
+
+  if (pContext->cqObjNum <= 0 && pContext->delete) {
+    delete = 1;
+  }
+
+  pthread_mutex_unlock(&pContext->mutex);
+
+  if (delete) {
+    pthread_mutex_unlock(&pContext->mutex);
+    
+    pthread_mutex_destroy(&pContext->mutex);
+    
+    taosTmrCleanUp(pContext->tmrCtrl);
+    pContext->tmrCtrl = NULL;
+    
+    cDebug("vgId:%d, CQ is closed", pContext->vgId);
+    free(pContext);
+  }
+}
+
+
+void cqCreateRef() {
+  int32_t ref = atomic_load_32(&cqObjRef);
+  if (ref == -1) {
+    ref = taosOpenRef(4096, cqFree);
+
+    if (atomic_val_compare_exchange_32(&cqObjRef, -1, ref) != -1) {
+      taosCloseRef(ref);
+    }  
+  }
+}
+
+
 void *cqOpen(void *ahandle, const SCqCfg *pCfg) {
   if (tsEnableStream == 0) {
     return NULL;
@@ -79,6 +160,8 @@ void *cqOpen(void *ahandle, const SCqCfg *pCfg) {
     return NULL;
   }
 
+  cqCreateRef();
+
   pContext->tmrCtrl = taosTmrInit(0, 0, 0, "CQ");
 
   tstrncpy(pContext->user, pCfg->user, sizeof(pContext->user));
@@ -97,6 +180,7 @@ void *cqOpen(void *ahandle, const SCqCfg *pCfg) {
 
   pthread_mutex_init(&pContext->mutex, NULL);
 
+
   cDebug("vgId:%d, CQ is opened", pContext->vgId);
 
   return pContext;
@@ -109,30 +193,30 @@ void cqClose(void *handle) {
   SCqContext *pContext = handle;
   if (handle == NULL) return;
 
+  pContext->delete = 1;
+  
   // stop all CQs
   cqStop(pContext);
 
-  // free all resources
-  pthread_mutex_lock(&pContext->mutex);
-
-  SCqObj *pObj = pContext->pHead;
-  while (pObj) {
-    SCqObj *pTemp = pObj;
-    pObj = pObj->next;
-    tdFreeSchema(pTemp->pSchema);
-    tfree(pTemp->sqlStr);
-    free(pTemp);
-  } 
-  
-  pthread_mutex_unlock(&pContext->mutex);
+  int64_t rid = 0;
 
-  pthread_mutex_destroy(&pContext->mutex);
+  while (1) {
+    pthread_mutex_lock(&pContext->mutex);
 
-  taosTmrCleanUp(pContext->tmrCtrl);
-  pContext->tmrCtrl = NULL;
+    SCqObj *pObj = pContext->pHead;
+    if (pObj) {
+      cqRmFromList(pObj);
 
-  cDebug("vgId:%d, CQ is closed", pContext->vgId);
-  free(pContext);
+      rid = pObj->rid;
+    } else {      
+      pthread_mutex_unlock(&pContext->mutex);
+      break;
+    }
+    
+    pthread_mutex_unlock(&pContext->mutex);
+    
+    taosRemoveRef(cqObjRef, rid);
+  }
 }
 
 void cqStart(void *handle) {
@@ -191,7 +275,8 @@ void *cqCreate(void *handle, uint64_t uid, int32_t sid, const char* dstTable, ch
     return NULL;
   }
   SCqContext *pContext = handle;
-
+  int64_t rid = 0;
+  
   SCqObj *pObj = calloc(sizeof(SCqObj), 1);
   if (pObj == NULL) return NULL;
 
@@ -213,32 +298,36 @@ void *cqCreate(void *handle, uint64_t uid, int32_t sid, const char* dstTable, ch
   if (pContext->pHead) pContext->pHead->prev = pObj;
   pContext->pHead = pObj;
 
+  pContext->cqObjNum++;
+
+  pObj->rid = taosAddRef(cqObjRef, pObj);
+
   cqCreateStream(pContext, pObj);
 
+  rid = pObj->rid;
+
   pthread_mutex_unlock(&pContext->mutex);
 
-  return pObj;
+
+  return (void *)rid;
 }
 
 void cqDrop(void *handle) {
   if (tsEnableStream == 0) {
     return;
   }
-  SCqObj *pObj = handle;
-  SCqContext *pContext = pObj->pContext;
-
-  pthread_mutex_lock(&pContext->mutex);
 
-  if (pObj->prev) {
-    pObj->prev->next = pObj->next;
-  } else {
-    pContext->pHead = pObj->next;
-  }
-
-  if (pObj->next) {
-    pObj->next->prev = pObj->prev;
+  SCqObj* pObj = (SCqObj*)taosAcquireRef(cqObjRef, (int64_t)handle);
+  if (pObj == NULL) {
+    return;
   }
+  
+  SCqContext *pContext = pObj->pContext;
+  
+  pthread_mutex_lock(&pContext->mutex);
 
+  cqRmFromList(pObj);
+  
   // free the resources associated
   if (pObj->pStream) {
     taos_close_stream(pObj->pStream);
@@ -248,17 +337,18 @@ void cqDrop(void *handle) {
     pObj->tmrId = 0;
   }
 
-  cInfo("vgId:%d, id:%d CQ:%s is dropped", pContext->vgId, pObj->tid, pObj->sqlStr); 
-  tdFreeSchema(pObj->pSchema);
-  free(pObj->dstTable);
-  free(pObj->sqlStr);
-  free(pObj);
-
   pthread_mutex_unlock(&pContext->mutex);
+
+  taosRemoveRef(cqObjRef, (int64_t)handle);
+  taosReleaseRef(cqObjRef, (int64_t)handle);
 }
 
 static void doCreateStream(void *param, TAOS_RES *result, int32_t code) {
-  SCqObj* pObj = (SCqObj*)param;
+  SCqObj* pObj = (SCqObj*)taosAcquireRef(cqObjRef, (int64_t)param);
+  if (pObj == NULL) {
+    return;
+  }
+  
   SCqContext* pContext = pObj->pContext;
   SSqlObj* pSql = (SSqlObj*)result;
   if (atomic_val_compare_exchange_ptr(&(pContext->dbConn), NULL, pSql->pTscObj) != NULL) {
@@ -267,10 +357,16 @@ static void doCreateStream(void *param, TAOS_RES *result, int32_t code) {
   pthread_mutex_lock(&pContext->mutex);
   cqCreateStream(pContext, pObj);
   pthread_mutex_unlock(&pContext->mutex);
+
+  taosReleaseRef(cqObjRef, (int64_t)param);
 }
 
 static void cqProcessCreateTimer(void *param, void *tmrId) {
-  SCqObj* pObj = (SCqObj*)param;
+  SCqObj* pObj = (SCqObj*)taosAcquireRef(cqObjRef, (int64_t)param);
+  if (pObj == NULL) {
+    return;
+  }
+  
   SCqContext* pContext = pObj->pContext;
 
   if (pContext->dbConn == NULL) {
@@ -281,6 +377,8 @@ static void cqProcessCreateTimer(void *param, void *tmrId) {
     cqCreateStream(pContext, pObj);
     pthread_mutex_unlock(&pContext->mutex);
   }
+
+  taosReleaseRef(cqObjRef, (int64_t)param);
 }
 
 static void cqCreateStream(SCqContext *pContext, SCqObj *pObj) {
@@ -288,13 +386,13 @@ static void cqCreateStream(SCqContext *pContext, SCqObj *pObj) {
 
   if (pContext->dbConn == NULL) {
     cDebug("vgId:%d, create dbConn after 1000 ms", pContext->vgId);
-    pObj->tmrId = taosTmrStart(cqProcessCreateTimer, 1000, pObj, pContext->tmrCtrl);
+    pObj->tmrId = taosTmrStart(cqProcessCreateTimer, 1000, (void *)pObj->rid, pContext->tmrCtrl);
     return;
   }
   pObj->tmrId = 0;
 
   if (pObj->pStream == NULL) {
-    pObj->pStream = taos_open_stream(pContext->dbConn, pObj->sqlStr, cqProcessStreamRes, 0, pObj, NULL);
+    pObj->pStream = taos_open_stream(pContext->dbConn, pObj->sqlStr, cqProcessStreamRes, 0, (void *)pObj->rid, NULL);
 
     // TODO the pObj->pStream may be released if error happens
     if (pObj->pStream) {
@@ -308,18 +406,28 @@ static void cqCreateStream(SCqContext *pContext, SCqObj *pObj) {
 }
 
 static void cqProcessStreamRes(void *param, TAOS_RES *tres, TAOS_ROW row) {
-  SCqObj *pObj = (SCqObj *)param;
+  SCqObj* pObj = (SCqObj*)taosAcquireRef(cqObjRef, (int64_t)param);
+  if (pObj == NULL) {
+    return;
+  }
+  
   if (tres == NULL && row == NULL) {
     taos_close_stream(pObj->pStream);
 
     pObj->pStream = NULL;
+
+    taosReleaseRef(cqObjRef, (int64_t)param);
+
     return;
   }
 
   SCqContext *pContext = pObj->pContext;
   STSchema   *pSchema = pObj->pSchema;
-  if (pObj->pStream == NULL) return;
-
+  if (pObj->pStream == NULL) {    
+    taosReleaseRef(cqObjRef, (int64_t)param);
+    return;
+  }
+  
   cDebug("vgId:%d, id:%d CQ:%s stream result is ready", pContext->vgId, pObj->tid, pObj->sqlStr);
 
   int32_t size = sizeof(SWalHead) + sizeof(SSubmitMsg) + sizeof(SSubmitBlk) + TD_DATA_ROW_HEAD_SIZE + pObj->rowSize;
@@ -370,5 +478,7 @@ static void cqProcessStreamRes(void *param, TAOS_RES *tres, TAOS_ROW row) {
   // write into vnode write queue
   pContext->cqWrite(pContext->vgId, pHead, TAOS_QTYPE_CQ, NULL);
   free(buffer);
+  
+  taosReleaseRef(cqObjRef, (int64_t)param);
 }
 

src/dnode/src/dnodeCfg.c

@@ -156,7 +156,7 @@ static int32_t dnodeWriteCfg() {
   len += snprintf(content + len, maxLen - len, "}\n");
 
   fwrite(content, 1, len, fp);
-  fflush(fp);
+  fsync(fileno(fp));
   fclose(fp);
   free(content);
   terrno = 0;

src/dnode/src/dnodeEps.c

@@ -277,7 +277,7 @@ static int32_t dnodeWriteEps() {
   len += snprintf(content + len, maxLen - len, "}\n");
 
   fwrite(content, 1, len, fp);
-  fflush(fp);
+  fsync(fileno(fp));
   fclose(fp);
   free(content);
   terrno = 0;

src/dnode/src/dnodeMInfos.c

@@ -286,7 +286,7 @@ static int32_t dnodeWriteMInfos() {
   len += snprintf(content + len, maxLen - len, "}\n");
 
   fwrite(content, 1, len, fp);
-  fflush(fp);
+  fsync(fileno(fp));
   fclose(fp);
   free(content);
   terrno = 0;

src/mnode/src/mnodeUser.c

@@ -123,7 +123,7 @@ static void mnodePrintUserAuth() {
     mnodeDecUserRef(pUser);
   }
 
-  fflush(fp);
+  fsync(fileno(fp));
   fclose(fp);
 }
 

src/query/src/qExecutor.c

@@ -7832,15 +7832,15 @@ static int64_t getQuerySupportBufSize(size_t numOfTables) {
 
 int32_t checkForQueryBuf(size_t numOfTables) {
   int64_t t = getQuerySupportBufSize(numOfTables);
-  if (tsQueryBufferSize < 0) {
+  if (tsQueryBufferSizeBytes < 0) {
     return TSDB_CODE_SUCCESS;
-  } else if (tsQueryBufferSize > 0) {
+  } else if (tsQueryBufferSizeBytes > 0) {
 
     while(1) {
-      int64_t s = tsQueryBufferSize;
+      int64_t s = tsQueryBufferSizeBytes;
       int64_t remain = s - t;
       if (remain >= 0) {
-        if (atomic_val_compare_exchange_64(&tsQueryBufferSize, s, remain) == s) {
+        if (atomic_val_compare_exchange_64(&tsQueryBufferSizeBytes, s, remain) == s) {
           return TSDB_CODE_SUCCESS;
         }
       } else {
@@ -7854,14 +7854,14 @@ int32_t checkForQueryBuf(size_t numOfTables) {
 }
 
 void releaseQueryBuf(size_t numOfTables) {
-  if (tsQueryBufferSize <= 0) {
+  if (tsQueryBufferSizeBytes < 0) {
     return;
   }
 
   int64_t t = getQuerySupportBufSize(numOfTables);
 
   // restore value is not enough buffer available
-  atomic_add_fetch_64(&tsQueryBufferSize, t);
+  atomic_add_fetch_64(&tsQueryBufferSizeBytes, t);
 }
 
 void* qGetResultRetrieveMsg(qinfo_t qinfo) {

src/rpc/src/rpcTcp.c

@@ -48,6 +48,13 @@ typedef struct SThreadObj {
   void           *(*processData)(SRecvInfo *pPacket);
 } SThreadObj;
 
+typedef struct {
+  char    label[TSDB_LABEL_LEN];
+  int32_t index;
+  int numOfThreads;
+  SThreadObj **pThreadObj;
+} SClientObj;
+
 typedef struct {
   SOCKET      fd;
   uint32_t    ip;
@@ -116,6 +123,7 @@ void *taosInitTcpServer(uint32_t ip, uint16_t port, char *label, int numOfThread
     pThreadObj->processData = fp;
     tstrncpy(pThreadObj->label, label, sizeof(pThreadObj->label));
     pThreadObj->shandle = shandle;
+    pThreadObj->stop = false;
   }
 
   // initialize mutex, thread, fd which may fail
@@ -166,6 +174,7 @@ void *taosInitTcpServer(uint32_t ip, uint16_t port, char *label, int numOfThread
 }
 
 static void taosStopTcpThread(SThreadObj* pThreadObj) {
+  if (pThreadObj == NULL)  { return;}
   // save thread into local variable and signal thread to stop 
   pthread_t thread = pThreadObj->thread; 
   if (!taosCheckPthreadValid(thread)) {
@@ -282,49 +291,76 @@ static void *taosAcceptTcpConnection(void *arg) {
   return NULL;
 }
 
-void *taosInitTcpClient(uint32_t ip, uint16_t port, char *label, int num, void *fp, void *shandle) {
-  SThreadObj    *pThreadObj;
-  pthread_attr_t thattr;
-
-  pThreadObj = (SThreadObj *)malloc(sizeof(SThreadObj));
-  memset(pThreadObj, 0, sizeof(SThreadObj));
-  tstrncpy(pThreadObj->label, label, sizeof(pThreadObj->label));
-  pThreadObj->ip = ip;
-  pThreadObj->shandle = shandle;
-
-  if (pthread_mutex_init(&(pThreadObj->mutex), NULL) < 0) {
-    tError("%s failed to init TCP client mutex(%s)", label, strerror(errno));
-    free(pThreadObj);
+void *taosInitTcpClient(uint32_t ip, uint16_t port, char *label, int numOfThreads, void *fp, void *shandle) {
+  SClientObj *pClientObj = (SClientObj *)calloc(1, sizeof(SClientObj));
+  if (pClientObj == NULL) {
+    tError("TCP:%s no enough memory", label);
     terrno = TAOS_SYSTEM_ERROR(errno); 
     return NULL;
-  }
+  } 
 
-  pThreadObj->pollFd = (EpollFd)epoll_create(10);  // size does not matter
-  if (pThreadObj->pollFd < 0) {
-    tError("%s failed to create TCP client epoll", label);
-    free(pThreadObj);
+  tstrncpy(pClientObj->label, label, sizeof(pClientObj->label));
+  pClientObj->numOfThreads = numOfThreads;
+  pClientObj->pThreadObj = (SThreadObj **)calloc(numOfThreads, sizeof(SThreadObj*));  
+  if (pClientObj->pThreadObj == NULL) {
+    tError("TCP:%s no enough memory", label);
+    tfree(pClientObj);
     terrno = TAOS_SYSTEM_ERROR(errno); 
-    return NULL;
   }
 
-  pThreadObj->processData = fp;
-
+  int code = 0;
+  pthread_attr_t thattr;
   pthread_attr_init(&thattr);
   pthread_attr_setdetachstate(&thattr, PTHREAD_CREATE_JOINABLE);
-  int code = pthread_create(&(pThreadObj->thread), &thattr, taosProcessTcpData, (void *)(pThreadObj));
-  pthread_attr_destroy(&thattr);
-  if (code != 0) {
-    EpollClose(pThreadObj->pollFd);
-    pThreadObj->pollFd = -1;
-    free(pThreadObj);
-    terrno = TAOS_SYSTEM_ERROR(errno); 
-    tError("%s failed to create TCP read data thread(%s)", label, strerror(errno));
-    return NULL;
+
+  for (int i = 0; i < numOfThreads; ++i) {
+    SThreadObj *pThreadObj = (SThreadObj *)calloc(1, sizeof(SThreadObj));
+    if (pThreadObj == NULL) {
+      tError("TCP:%s no enough memory", label);
+      terrno = TAOS_SYSTEM_ERROR(errno); 
+      for (int j=0; j<i; ++j) free(pClientObj->pThreadObj[j]);
+      free(pClientObj);
+      pthread_attr_destroy(&thattr);
+      return NULL;
+    }
+    pClientObj->pThreadObj[i] = pThreadObj;
+    taosResetPthread(&pThreadObj->thread);
+    pThreadObj->ip      = ip;
+    pThreadObj->stop    = false;
+    tstrncpy(pThreadObj->label, label, sizeof(pThreadObj->label));
+    pThreadObj->shandle = shandle;
+    pThreadObj->processData = fp;
   }
 
-  tDebug("%s TCP client is initialized, ip:%u:%hu", label, ip, port);
+  // initialize mutex, thread, fd which may fail
+  for (int i = 0; i < numOfThreads; ++i) {
+    SThreadObj *pThreadObj = pClientObj->pThreadObj[i];
+    code = pthread_mutex_init(&(pThreadObj->mutex), NULL);
+    if (code < 0) {
+      tError("%s failed to init TCP process data mutex(%s)", label, strerror(errno));
+      break;
+    }
 
-  return pThreadObj;
+    pThreadObj->pollFd = (int64_t)epoll_create(10);  // size does not matter
+    if (pThreadObj->pollFd < 0) {
+      tError("%s failed to create TCP epoll", label);
+      code = -1;
+      break;
+    }
+
+    code = pthread_create(&(pThreadObj->thread), &thattr, taosProcessTcpData, (void *)(pThreadObj));
+    if (code != 0) {
+      tError("%s failed to create TCP process data thread(%s)", label, strerror(errno));
+      break;
+    }
+    pThreadObj->threadId = i;
+  }
+  if (code != 0) {
+    terrno = TAOS_SYSTEM_ERROR(errno); 
+    taosCleanUpTcpClient(pClientObj);
+    pClientObj = NULL;
+  } 
+  return pClientObj; 
 }
 
 void taosStopTcpClient(void *chandle) {
@@ -335,15 +371,23 @@ void taosStopTcpClient(void *chandle) {
 }
 
 void taosCleanUpTcpClient(void *chandle) {
-  SThreadObj *pThreadObj = chandle;
-  if (pThreadObj == NULL) return;
-
-  tDebug ("%s TCP client will be cleaned up", pThreadObj->label);
-  taosStopTcpThread(pThreadObj);
+  SClientObj *pClientObj = chandle;
+  if (pClientObj == NULL) return;
+  for (int i = 0; i < pClientObj->numOfThreads; ++i) { 
+    SThreadObj *pThreadObj= pClientObj->pThreadObj[i];
+    taosStopTcpThread(pThreadObj); 
+  }
+  
+  tDebug("%s TCP client is cleaned up", pClientObj->label);
+  tfree(pClientObj->pThreadObj);
+  tfree(pClientObj);   
 }
 
 void *taosOpenTcpClientConnection(void *shandle, void *thandle, uint32_t ip, uint16_t port) {
-  SThreadObj *    pThreadObj = shandle;
+  SClientObj *    pClientObj = shandle;
+  int32_t index = atomic_load_32(&pClientObj->index) % pClientObj->numOfThreads;
+    atomic_store_32(&pClientObj->index, index + 1); 
+  SThreadObj *pThreadObj = pClientObj->pThreadObj[index];
 
   SOCKET fd = taosOpenTcpClientSocket(ip, port, pThreadObj->ip);
   if (fd <= 0) return NULL;

src/vnode/src/vnodeCfg.c

@@ -341,7 +341,7 @@ int32_t vnodeWriteCfg(SCreateVnodeMsg *pMsg) {
   len += snprintf(content + len, maxLen - len, "}\n");
 
   fwrite(content, 1, len, fp);
-  fflush(fp);
+  fsync(fileno(fp));
   fclose(fp);
   free(content);
   terrno = 0;

src/vnode/src/vnodeVersion.c

@@ -90,7 +90,7 @@ int32_t vnodeSaveVersion(SVnodeObj *pVnode) {
   len += snprintf(content + len, maxLen - len, "}\n");
 
   fwrite(content, 1, len, fp);
-  fflush(fp);
+  fsync(fileno(fp));
   fclose(fp);
   free(content);
   terrno = 0;

tests/examples/JDBC/SpringJdbcTemplate/pom.xml

@@ -47,7 +47,7 @@
         <dependency>
             <groupId>com.taosdata.jdbc</groupId>
             <artifactId>taos-jdbcdriver</artifactId>
-            <version>2.0.4</version>
+            <version>2.0.18</version>
         </dependency>
 
     </dependencies>
@@ -69,7 +69,7 @@
                 <configuration>
                     <archive>
                         <manifest>
-                            <mainClass>com.taosdata.jdbc.example.jdbcTemplate.App</mainClass>
+                            <mainClass>com.taosdata.example.jdbcTemplate.App</mainClass>
                         </manifest>
                     </archive>
                     <descriptorRefs>

tests/examples/JDBC/SpringJdbcTemplate/readme.md

@@ -8,18 +8,16 @@
 修改 `src/main/resources/applicationContext.xml` 文件中 TDengine 的配置信息：
 
 ```xml
-
- <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
-        <property name="driverClassName" value="com.taosdata.jdbc.TSDBDriver"></property>
-        <property name="url" value="jdbc:TAOS://127.0.0.1:6030/log"></property>
-        <property name="username" value="root"></property>
-        <property name="password" value="taosdata"></property>
-    </bean>
-
-
-    <bean id = "jdbcTemplate"  class="org.springframework.jdbc.core.JdbcTemplate" >
-        <property name="dataSource" ref = "dataSource" ></property>
-    </bean>
+<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
+    <property name="driverClassName" value="com.taosdata.jdbc.TSDBDriver"></property>
+    <property name="url" value="jdbc:TAOS://127.0.0.1:6030/log"></property>
+    <property name="username" value="root"></property>
+    <property name="password" value="taosdata"></property>
+</bean>
+
+<bean id = "jdbcTemplate"  class="org.springframework.jdbc.core.JdbcTemplate" >
+    <property name="dataSource" ref = "dataSource" ></property>
+</bean>
 ```
 
 ### 打包运行

tests/examples/JDBC/SpringJdbcTemplate/src/main/java/com/taosdata/jdbc/example/jdbcTemplate/App.java → tests/examples/JDBC/SpringJdbcTemplate/src/main/java/com/taosdata/example/jdbcTemplate/App.java

-package com.taosdata.jdbc.example.jdbcTemplate;
+package com.taosdata.example.jdbcTemplate;
 
 
-import com.taosdata.jdbc.example.jdbcTemplate.dao.ExecuteAsStatement;
-import com.taosdata.jdbc.example.jdbcTemplate.dao.WeatherDao;
-import com.taosdata.jdbc.example.jdbcTemplate.domain.Weather;
+import com.taosdata.example.jdbcTemplate.dao.ExecuteAsStatement;
+import com.taosdata.example.jdbcTemplate.dao.WeatherDao;
+import com.taosdata.example.jdbcTemplate.domain.Weather;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.support.ClassPathXmlApplicationContext;
 

tests/examples/JDBC/SpringJdbcTemplate/src/main/java/com/taosdata/jdbc/example/jdbcTemplate/dao/ExecuteAsStatement.java → tests/examples/JDBC/SpringJdbcTemplate/src/main/java/com/taosdata/example/jdbcTemplate/dao/ExecuteAsStatement.java

-package com.taosdata.jdbc.example.jdbcTemplate.dao;
+package com.taosdata.example.jdbcTemplate.dao;
 
 public interface ExecuteAsStatement{
 

tests/examples/JDBC/SpringJdbcTemplate/src/main/java/com/taosdata/jdbc/example/jdbcTemplate/dao/impl/ExecuteAsStatementImpl.java → tests/examples/JDBC/SpringJdbcTemplate/src/main/java/com/taosdata/example/jdbcTemplate/dao/ExecuteAsStatementImpl.java

-package com.taosdata.jdbc.example.jdbcTemplate.dao.impl;
+package com.taosdata.example.jdbcTemplate.dao;
 
-import com.taosdata.jdbc.example.jdbcTemplate.dao.ExecuteAsStatement;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.jdbc.core.JdbcTemplate;
 import org.springframework.stereotype.Repository;

tests/examples/JDBC/SpringJdbcTemplate/src/main/java/com/taosdata/jdbc/example/jdbcTemplate/dao/WeatherDao.java → tests/examples/JDBC/SpringJdbcTemplate/src/main/java/com/taosdata/example/jdbcTemplate/dao/WeatherDao.java

-package com.taosdata.jdbc.example.jdbcTemplate.dao;
+package com.taosdata.example.jdbcTemplate.dao;
 
-import com.taosdata.jdbc.example.jdbcTemplate.domain.Weather;
+import com.taosdata.example.jdbcTemplate.domain.Weather;
 
 import java.util.List;
 

tests/examples/JDBC/SpringJdbcTemplate/src/main/java/com/taosdata/jdbc/example/jdbcTemplate/dao/impl/WeatherDaoImpl.java → tests/examples/JDBC/SpringJdbcTemplate/src/main/java/com/taosdata/example/jdbcTemplate/dao/WeatherDaoImpl.java

-package com.taosdata.jdbc.example.jdbcTemplate.dao.impl;
+package com.taosdata.example.jdbcTemplate.dao;
 
-import com.taosdata.jdbc.example.jdbcTemplate.dao.WeatherDao;
-import com.taosdata.jdbc.example.jdbcTemplate.domain.Weather;
+import com.taosdata.example.jdbcTemplate.domain.Weather;
+import com.taosdata.example.jdbcTemplate.dao.WeatherDao;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.jdbc.core.BatchPreparedStatementSetter;
 import org.springframework.jdbc.core.JdbcTemplate;
-import org.springframework.jdbc.core.namedparam.SqlParameterSourceUtils;
-import org.springframework.jdbc.core.simple.SimpleJdbcInsert;
 import org.springframework.stereotype.Repository;
 
 import java.sql.PreparedStatement;
 import java.sql.SQLException;
 import java.sql.Timestamp;
-import java.util.HashMap;
 import java.util.List;
-import java.util.Map;
 
 @Repository
 public class WeatherDaoImpl implements WeatherDao {

tests/examples/JDBC/SpringJdbcTemplate/src/main/java/com/taosdata/jdbc/example/jdbcTemplate/domain/Weather.java → tests/examples/JDBC/SpringJdbcTemplate/src/main/java/com/taosdata/example/jdbcTemplate/domain/Weather.java

-package com.taosdata.jdbc.example.jdbcTemplate.domain;
+package com.taosdata.example.jdbcTemplate.domain;
 
 import java.sql.Timestamp;
 

tests/examples/JDBC/SpringJdbcTemplate/src/main/resources/applicationContext.xml

@@ -10,7 +10,7 @@
 
     <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
         <property name="driverClassName" value="com.taosdata.jdbc.TSDBDriver"></property>
-        <property name="url" value="jdbc:TAOS://192.168.236.137:6030/"></property>
+        <property name="url" value="jdbc:TAOS://127.0.0.1:6030/"></property>
         <property name="username" value="root"></property>
         <property name="password" value="taosdata"></property>
     </bean>
@@ -20,6 +20,6 @@
         <property name="dataSource" ref="dataSource"></property>
     </bean>
 
-    <context:component-scan base-package="com.taosdata.jdbc.example.jdbcTemplate"/>
+    <context:component-scan base-package="com.taosdata.example.jdbcTemplate"/>
 
 </beans>

tests/examples/JDBC/SpringJdbcTemplate/src/test/java/com/taosdata/jdbc/example/jdbcTemplate/BatcherInsertTest.java → tests/examples/JDBC/SpringJdbcTemplate/src/test/java/com/taosdata/example/jdbcTemplate/BatcherInsertTest.java

-package com.taosdata.jdbc.example.jdbcTemplate;
+package com.taosdata.example.jdbcTemplate;
 
 
-import com.taosdata.jdbc.example.jdbcTemplate.dao.ExecuteAsStatement;
-import com.taosdata.jdbc.example.jdbcTemplate.dao.WeatherDao;
-import com.taosdata.jdbc.example.jdbcTemplate.domain.Weather;
+import com.taosdata.example.jdbcTemplate.dao.ExecuteAsStatement;
+import com.taosdata.example.jdbcTemplate.dao.WeatherDao;
+import com.taosdata.example.jdbcTemplate.domain.Weather;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;

tests/examples/JDBC/SpringJdbcTemplate/src/test/java/com/taosdata/jdbc/AppTest.java

-package com.taosdata.jdbc;
-
-import static org.junit.Assert.assertTrue;
-
-import org.junit.Test;
-
-/**
- * Unit test for simple App.
- */
-public class AppTest {
-    /**
-     * Rigorous Test :-)
-     */
-    @Test
-    public void shouldAnswerWithTrue() {
-        assertTrue(true);
-    }
-}

tests/examples/JDBC/readme.md

+# TDengine examples
+
+| No.  |        Name        | Describe                                                     |
+| :--: | :----------------: | ------------------------------------------------------------ |
+|  1   |      JDBCDemo      | Example codes for JDBC-JNI, JDBC-RESTful, Subscribe          |
+|  2   |  connectionPools   | Example codes for HikariCP, Druid, dbcp, c3p0 connection pools |
+|  3   | SpringJdbcTemplate | Example codes for spring jdbcTemplate                        |
+|  4   |  mybatisplus-demo  | Example codes for mybatis                                    |
+|  5   |   springbootdemo   | Example codes for springboot                                 |
+|  6   |      taosdemo      | This is an internal tool for testing Our JDBC-JNI, JDBC-RESTful, RESTful interfaces |
+
+
+more detail: https://www.taosdata.com/cn//documentation20/connector-java/
\ No newline at end of file

tests/script/general/parser/dbtbnameValidate.sim

@@ -26,11 +26,11 @@ sql use ' XYZ '
 
 sql drop database 'abc123'
 sql drop database '_ab1234'
-sql drop database 'ABC123'
+sql_error drop database 'ABC123'
 sql drop database '_ABC123'
 sql drop database 'aABb123'
 sql drop database ' xyz '
-sql drop database ' XYZ '
+sql_error drop database ' XYZ '
 
 
 sql use abc
@@ -67,9 +67,9 @@ sql describe mt
 sql describe sub_001
 sql describe sub_dy_tbl
 
-sql_error describe Dd
-sql_error describe FF
-sql_error describe gG
+sql describe Dd
+sql describe FF
+sql describe gG
 
 sql drop table abc.cc
 sql drop table  'abc.Dd'
@@ -119,4 +119,4 @@ if $rows != 4 then
   return -1
 endi
 
-system sh/exec.sh -n dnode1 -s stop -x SIGINT
+system sh/exec.sh -n dnode1 -s stop -x SIGINT
\ No newline at end of file

tests/test-all.sh

@@ -155,7 +155,7 @@ if [ "$2" != "python" ]; then
   elif [ "$1" == "b1" ]; then
     echo "### run TSIM b1 test ###"
     runSimCaseOneByOne jenkins/basic_1.txt
-    # runSimCaseOneByOne jenkins/basic_4.txt
+    runSimCaseOneByOne jenkins/basic_4.txt
   elif [ "$1" == "b2" ]; then
     echo "### run TSIM b2 test ###"
     runSimCaseOneByOne jenkins/basic_2.txt