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fix(sync): append entries batch

This commit is contained in:
Minghao Li 2022-07-08 14:47:00 +08:00
parent 1c3c270307
commit 1ee5468411
7 changed files with 133 additions and 288 deletions
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3
include/libs/sync/sync.h
View File

@ -163,9 +163,6 @@ typedef struct SSyncLogStore {
// return commit index of log
SyncIndex (*getCommitIndex)(struct SSyncLogStore* pLogStore);
// refactor, log[0 .. n] ==> log[m .. n]
// int32_t (*syncLogSetBeginIndex)(struct SSyncLogStore* pLogStore, SyncIndex beginIndex);
SyncIndex (*syncLogBeginIndex)(struct SSyncLogStore* pLogStore);
SyncIndex (*syncLogEndIndex)(struct SSyncLogStore* pLogStore);
bool (*syncLogIsEmpty)(struct SSyncLogStore* pLogStore);

355
source/libs/sync/src/syncAppendEntries.c
View File

@ -162,6 +162,17 @@ int32_t syncNodeOnAppendEntriesCb(SSyncNode* ths, SyncAppendEntries* pMsg) {
pReply->success = false;
pReply->matchIndex = SYNC_INDEX_INVALID;
// msg event log
do {
char host[128];
uint16_t port;
syncUtilU642Addr(pReply->destId.addr, host, sizeof(host), &port);
sDebug(
"vgId:%d, send sync-append-entries-reply to %s:%d, {term:%lu, pterm:%lu, success:%d, "
"match-index:%ld}",
ths->vgId, host, port, pReply->term, pReply->privateTerm, pReply->success, pReply->matchIndex);
} while (0);
SRpcMsg rpcMsg;
syncAppendEntriesReply2RpcMsg(pReply, &rpcMsg);
syncNodeSendMsgById(&pReply->destId, ths, &rpcMsg);
@ -334,270 +345,16 @@ int32_t syncNodeOnAppendEntriesCb(SSyncNode* ths, SyncAppendEntries* pMsg) {
pReply->matchIndex = pMsg->prevLogIndex;
}
SRpcMsg rpcMsg;
syncAppendEntriesReply2RpcMsg(pReply, &rpcMsg);
syncNodeSendMsgById(&pReply->destId, ths, &rpcMsg);
syncAppendEntriesReplyDestroy(pReply);
// maybe update commit index from leader
if (pMsg->commitIndex > ths->commitIndex) {
// has commit entry in local
if (pMsg->commitIndex <= ths->pLogStore->getLastIndex(ths->pLogStore)) {
SyncIndex beginIndex = ths->commitIndex + 1;
SyncIndex endIndex = pMsg->commitIndex;
// update commit index
ths->commitIndex = pMsg->commitIndex;
// call back Wal
ths->pLogStore->updateCommitIndex(ths->pLogStore, ths->commitIndex);
int32_t code = syncNodeCommit(ths, beginIndex, endIndex, ths->state);
ASSERT(code == 0);
}
}
}
return ret;
}
#if 0
int32_t syncNodeOnAppendEntriesCb(SSyncNode* ths, SyncAppendEntries* pMsg) {
int32_t ret = 0;
char logBuf[128] = {0};
snprintf(logBuf, sizeof(logBuf), "==syncNodeOnAppendEntriesCb== term:%lu", ths->pRaftStore->currentTerm);
syncAppendEntriesLog2(logBuf, pMsg);
if (pMsg->term > ths->pRaftStore->currentTerm) {
syncNodeUpdateTerm(ths, pMsg->term);
}
ASSERT(pMsg->term <= ths->pRaftStore->currentTerm);
// reset elect timer
if (pMsg->term == ths->pRaftStore->currentTerm) {
ths->leaderCache = pMsg->srcId;
syncNodeResetElectTimer(ths);
}
ASSERT(pMsg->dataLen >= 0);
SyncTerm localPreLogTerm = 0;
if (pMsg->prevLogIndex >= SYNC_INDEX_BEGIN && pMsg->prevLogIndex <= ths->pLogStore->getLastIndex(ths->pLogStore)) {
SSyncRaftEntry* pEntry = ths->pLogStore->getEntry(ths->pLogStore, pMsg->prevLogIndex);
if (pEntry == NULL) {
char logBuf[128];
snprintf(logBuf, sizeof(logBuf), "getEntry error, index:%ld, since %s", pMsg->prevLogIndex, terrstr());
syncNodeErrorLog(ths, logBuf);
return -1;
}
localPreLogTerm = pEntry->term;
syncEntryDestory(pEntry);
}
bool logOK =
(pMsg->prevLogIndex == SYNC_INDEX_INVALID) ||
((pMsg->prevLogIndex >= SYNC_INDEX_BEGIN) &&
(pMsg->prevLogIndex <= ths->pLogStore->getLastIndex(ths->pLogStore)) && (pMsg->prevLogTerm == localPreLogTerm));
// reject request
if ((pMsg->term < ths->pRaftStore->currentTerm) ||
((pMsg->term == ths->pRaftStore->currentTerm) && (ths->state == TAOS_SYNC_STATE_FOLLOWER) && !logOK)) {
sTrace(
"syncNodeOnAppendEntriesCb --> reject, pMsg->term:%lu, ths->pRaftStore->currentTerm:%lu, ths->state:%d, "
"logOK:%d",
pMsg->term, ths->pRaftStore->currentTerm, ths->state, logOK);
SyncAppendEntriesReply* pReply = syncAppendEntriesReplyBuild(ths->vgId);
pReply->srcId = ths->myRaftId;
pReply->destId = pMsg->srcId;
pReply->term = ths->pRaftStore->currentTerm;
pReply->success = false;
pReply->matchIndex = SYNC_INDEX_INVALID;
SRpcMsg rpcMsg;
syncAppendEntriesReply2RpcMsg(pReply, &rpcMsg);
syncNodeSendMsgById(&pReply->destId, ths, &rpcMsg);
syncAppendEntriesReplyDestroy(pReply);
return ret;
}
// return to follower state
if (pMsg->term == ths->pRaftStore->currentTerm && ths->state == TAOS_SYNC_STATE_CANDIDATE) {
sTrace(
"syncNodeOnAppendEntriesCb --> return to follower, pMsg->term:%lu, ths->pRaftStore->currentTerm:%lu, "
"ths->state:%d, logOK:%d",
pMsg->term, ths->pRaftStore->currentTerm, ths->state, logOK);
syncNodeBecomeFollower(ths, "from candidate by append entries");
// ret or reply?
return ret;
}
// accept request
if (pMsg->term == ths->pRaftStore->currentTerm && ths->state == TAOS_SYNC_STATE_FOLLOWER && logOK) {
// preIndex = -1, or has preIndex entry in local log
ASSERT(pMsg->prevLogIndex <= ths->pLogStore->getLastIndex(ths->pLogStore));
// has extra entries (> preIndex) in local log
bool hasExtraEntries = pMsg->prevLogIndex < ths->pLogStore->getLastIndex(ths->pLogStore);
// has entries in SyncAppendEntries msg
bool hasAppendEntries = pMsg->dataLen > 0;
sTrace(
"syncNodeOnAppendEntriesCb --> accept, pMsg->term:%lu, ths->pRaftStore->currentTerm:%lu, ths->state:%d, "
"logOK:%d, hasExtraEntries:%d, hasAppendEntries:%d",
pMsg->term, ths->pRaftStore->currentTerm, ths->state, logOK, hasExtraEntries, hasAppendEntries);
if (hasExtraEntries && hasAppendEntries) {
// not conflict by default
bool conflict = false;
SyncIndex extraIndex = pMsg->prevLogIndex + 1;
SSyncRaftEntry* pExtraEntry = ths->pLogStore->getEntry(ths->pLogStore, extraIndex);
if (pExtraEntry == NULL) {
char logBuf[128];
snprintf(logBuf, sizeof(logBuf), "getEntry error2, index:%ld, since %s", extraIndex, terrstr());
syncNodeErrorLog(ths, logBuf);
return -1;
}
SSyncRaftEntry* pAppendEntry = syncEntryDeserialize(pMsg->data, pMsg->dataLen);
if (pAppendEntry == NULL) {
syncNodeErrorLog(ths, "syncEntryDeserialize pAppendEntry error");
return -1;
}
// log not match, conflict
ASSERT(extraIndex == pAppendEntry->index);
if (pExtraEntry->term != pAppendEntry->term) {
conflict = true;
}
if (conflict) {
// roll back
SyncIndex delBegin = ths->pLogStore->getLastIndex(ths->pLogStore);
SyncIndex delEnd = extraIndex;
sTrace("syncNodeOnAppendEntriesCb --> conflict:%d, delBegin:%ld, delEnd:%ld", conflict, delBegin, delEnd);
// notice! reverse roll back!
for (SyncIndex index = delEnd; index >= delBegin; --index) {
if (ths->pFsm->FpRollBackCb != NULL) {
SSyncRaftEntry* pRollBackEntry = ths->pLogStore->getEntry(ths->pLogStore, index);
if (pRollBackEntry == NULL) {
char logBuf[128];
snprintf(logBuf, sizeof(logBuf), "getEntry error3, index:%ld, since %s", index, terrstr());
syncNodeErrorLog(ths, logBuf);
return -1;
}
// if (pRollBackEntry->msgType != TDMT_SYNC_NOOP) {
if (syncUtilUserRollback(pRollBackEntry->msgType)) {
SRpcMsg rpcMsg;
syncEntry2OriginalRpc(pRollBackEntry, &rpcMsg);
SFsmCbMeta cbMeta = {0};
cbMeta.index = pRollBackEntry->index;
cbMeta.lastConfigIndex = syncNodeGetSnapshotConfigIndex(ths, cbMeta.index);
cbMeta.isWeak = pRollBackEntry->isWeak;
cbMeta.code = 0;
cbMeta.state = ths->state;
cbMeta.seqNum = pRollBackEntry->seqNum;
ths->pFsm->FpRollBackCb(ths->pFsm, &rpcMsg, cbMeta);
rpcFreeCont(rpcMsg.pCont);
}
syncEntryDestory(pRollBackEntry);
}
}
// delete confict entries
ths->pLogStore->truncate(ths->pLogStore, extraIndex);
// append new entries
ths->pLogStore->appendEntry(ths->pLogStore, pAppendEntry);
// pre commit
SRpcMsg rpcMsg;
syncEntry2OriginalRpc(pAppendEntry, &rpcMsg);
if (ths->pFsm != NULL) {
// if (ths->pFsm->FpPreCommitCb != NULL && pAppendEntry->originalRpcType != TDMT_SYNC_NOOP) {
if (ths->pFsm->FpPreCommitCb != NULL && syncUtilUserPreCommit(pAppendEntry->originalRpcType)) {
SFsmCbMeta cbMeta = {0};
cbMeta.index = pAppendEntry->index;
cbMeta.lastConfigIndex = syncNodeGetSnapshotConfigIndex(ths, cbMeta.index);
cbMeta.isWeak = pAppendEntry->isWeak;
cbMeta.code = 2;
cbMeta.state = ths->state;
cbMeta.seqNum = pAppendEntry->seqNum;
ths->pFsm->FpPreCommitCb(ths->pFsm, &rpcMsg, cbMeta);
}
}
rpcFreeCont(rpcMsg.pCont);
}
// free memory
syncEntryDestory(pExtraEntry);
syncEntryDestory(pAppendEntry);
} else if (hasExtraEntries && !hasAppendEntries) {
// do nothing
} else if (!hasExtraEntries && hasAppendEntries) {
SSyncRaftEntry* pAppendEntry = syncEntryDeserialize(pMsg->data, pMsg->dataLen);
if (pAppendEntry == NULL) {
syncNodeErrorLog(ths, "syncEntryDeserialize pAppendEntry2 error");
return -1;
}
// append new entries
ths->pLogStore->appendEntry(ths->pLogStore, pAppendEntry);
// pre commit
SRpcMsg rpcMsg;
syncEntry2OriginalRpc(pAppendEntry, &rpcMsg);
if (ths->pFsm != NULL) {
// if (ths->pFsm->FpPreCommitCb != NULL && pAppendEntry->originalRpcType != TDMT_SYNC_NOOP) {
if (ths->pFsm->FpPreCommitCb != NULL && syncUtilUserPreCommit(pAppendEntry->originalRpcType)) {
SFsmCbMeta cbMeta = {0};
cbMeta.index = pAppendEntry->index;
cbMeta.lastConfigIndex = syncNodeGetSnapshotConfigIndex(ths, cbMeta.index);
cbMeta.isWeak = pAppendEntry->isWeak;
cbMeta.code = 3;
cbMeta.state = ths->state;
cbMeta.seqNum = pAppendEntry->seqNum;
ths->pFsm->FpPreCommitCb(ths->pFsm, &rpcMsg, cbMeta);
}
}
rpcFreeCont(rpcMsg.pCont);
// free memory
syncEntryDestory(pAppendEntry);
} else if (!hasExtraEntries && !hasAppendEntries) {
// do nothing
} else {
syncNodeLog3("", ths);
ASSERT(0);
}
SyncAppendEntriesReply* pReply = syncAppendEntriesReplyBuild(ths->vgId);
pReply->srcId = ths->myRaftId;
pReply->destId = pMsg->srcId;
pReply->term = ths->pRaftStore->currentTerm;
pReply->success = true;
if (hasAppendEntries) {
pReply->matchIndex = pMsg->prevLogIndex + 1;
} else {
pReply->matchIndex = pMsg->prevLogIndex;
}
// msg event log
do {
char host[128];
uint16_t port;
syncUtilU642Addr(pReply->destId.addr, host, sizeof(host), &port);
sDebug(
"vgId:%d, send sync-append-entries-reply to %s:%d, {term:%lu, pterm:%lu, success:%d, "
"match-index:%ld}",
ths->vgId, host, port, pReply->term, pReply->privateTerm, pReply->success, pReply->matchIndex);
} while (0);
SRpcMsg rpcMsg;
syncAppendEntriesReply2RpcMsg(pReply, &rpcMsg);
@ -626,8 +383,6 @@ int32_t syncNodeOnAppendEntriesCb(SSyncNode* ths, SyncAppendEntries* pMsg) {
return ret;
}
#endif
static int32_t syncNodeMakeLogSame(SSyncNode* ths, SyncAppendEntries* pMsg) {
int32_t code;
@ -897,6 +652,17 @@ int32_t syncNodeOnAppendEntriesSnapshot2Cb(SSyncNode* ths, SyncAppendEntriesBatc
pReply->success = true;
pReply->matchIndex = matchIndex;
// msg event log
do {
char host[128];
uint16_t port;
syncUtilU642Addr(pReply->destId.addr, host, sizeof(host), &port);
sDebug(
"vgId:%d, send sync-append-entries-reply to %s:%d, {term:%lu, pterm:%lu, success:%d, "
"match-index:%ld}",
ths->vgId, host, port, pReply->term, pReply->privateTerm, pReply->success, pReply->matchIndex);
} while (0);
// send response
SRpcMsg rpcMsg;
syncAppendEntriesReply2RpcMsg(pReply, &rpcMsg);
@ -945,6 +711,17 @@ int32_t syncNodeOnAppendEntriesSnapshot2Cb(SSyncNode* ths, SyncAppendEntriesBatc
pReply->success = false;
pReply->matchIndex = SYNC_INDEX_INVALID;
// msg event log
do {
char host[128];
uint16_t port;
syncUtilU642Addr(pReply->destId.addr, host, sizeof(host), &port);
sDebug(
"vgId:%d, send sync-append-entries-reply to %s:%d, {term:%lu, pterm:%lu, success:%d, "
"match-index:%ld}",
ths->vgId, host, port, pReply->term, pReply->privateTerm, pReply->success, pReply->matchIndex);
} while (0);
// send response
SRpcMsg rpcMsg;
syncAppendEntriesReply2RpcMsg(pReply, &rpcMsg);
@ -977,7 +754,7 @@ int32_t syncNodeOnAppendEntriesSnapshot2Cb(SSyncNode* ths, SyncAppendEntriesBatc
do {
char logBuf[128];
snprintf(logBuf, sizeof(logBuf),
"recv sync-append-entries, match, {pre-index:%ld, pre-term:%lu, datalen:%d, datacount:%d}",
"recv sync-append-entries-batch, match, {pre-index:%ld, pre-term:%lu, datalen:%d, datacount:%d}",
pMsg->prevLogIndex, pMsg->prevLogTerm, pMsg->dataLen, pMsg->dataCount);
syncNodeEventLog(ths, logBuf);
} while (0);
@ -1018,6 +795,17 @@ int32_t syncNodeOnAppendEntriesSnapshot2Cb(SSyncNode* ths, SyncAppendEntriesBatc
pReply->success = true;
pReply->matchIndex = hasAppendEntries ? pMsg->prevLogIndex + pMsg->dataCount : pMsg->prevLogIndex;
// msg event log
do {
char host[128];
uint16_t port;
syncUtilU642Addr(pReply->destId.addr, host, sizeof(host), &port);
sDebug(
"vgId:%d, send sync-append-entries-reply to %s:%d, {term:%lu, pterm:%lu, success:%d, "
"match-index:%ld}",
ths->vgId, host, port, pReply->term, pReply->privateTerm, pReply->success, pReply->matchIndex);
} while (0);
// send response
SRpcMsg rpcMsg;
syncAppendEntriesReply2RpcMsg(pReply, &rpcMsg);
@ -1227,6 +1015,17 @@ int32_t syncNodeOnAppendEntriesSnapshotCb(SSyncNode* ths, SyncAppendEntries* pMs
pReply->success = true;
pReply->matchIndex = matchIndex;
// msg event log
do {
char host[128];
uint16_t port;
syncUtilU642Addr(pReply->destId.addr, host, sizeof(host), &port);
sDebug(
"vgId:%d, send sync-append-entries-reply to %s:%d, {term:%lu, pterm:%lu, success:%d, "
"match-index:%ld}",
ths->vgId, host, port, pReply->term, pReply->privateTerm, pReply->success, pReply->matchIndex);
} while (0);
// send response
SRpcMsg rpcMsg;
syncAppendEntriesReply2RpcMsg(pReply, &rpcMsg);
@ -1272,6 +1071,17 @@ int32_t syncNodeOnAppendEntriesSnapshotCb(SSyncNode* ths, SyncAppendEntries* pMs
pReply->success = false;
pReply->matchIndex = SYNC_INDEX_INVALID;
// msg event log
do {
char host[128];
uint16_t port;
syncUtilU642Addr(pReply->destId.addr, host, sizeof(host), &port);
sDebug(
"vgId:%d, send sync-append-entries-reply to %s:%d, {term:%lu, pterm:%lu, success:%d, "
"match-index:%ld}",
ths->vgId, host, port, pReply->term, pReply->privateTerm, pReply->success, pReply->matchIndex);
} while (0);
// send response
SRpcMsg rpcMsg;
syncAppendEntriesReply2RpcMsg(pReply, &rpcMsg);
@ -1337,6 +1147,17 @@ int32_t syncNodeOnAppendEntriesSnapshotCb(SSyncNode* ths, SyncAppendEntries* pMs
pReply->success = true;
pReply->matchIndex = hasAppendEntries ? pMsg->prevLogIndex + 1 : pMsg->prevLogIndex;
// msg event log
do {
char host[128];
uint16_t port;
syncUtilU642Addr(pReply->destId.addr, host, sizeof(host), &port);
sDebug(
"vgId:%d, send sync-append-entries-reply to %s:%d, {term:%lu, pterm:%lu, success:%d, "
"match-index:%ld}",
ths->vgId, host, port, pReply->term, pReply->privateTerm, pReply->success, pReply->matchIndex);
} while (0);
// send response
SRpcMsg rpcMsg;
syncAppendEntriesReply2RpcMsg(pReply, &rpcMsg);

6
source/libs/sync/src/syncMain.c
View File

@ -1311,8 +1311,10 @@ int32_t syncNodeSendMsgById(const SRaftId* destRaftId, SSyncNode* pSyncNode, SRp
pMsg->info.noResp = 1;
pSyncNode->FpSendMsg(&epSet, pMsg);
} else {
sTrace("syncNodeSendMsgById pSyncNode->FpSendMsg is NULL");
sError("vgId:%d, sync send msg by id error, fp-send-msg is null", pSyncNode->vgId);
return -1;
}
return 0;
}
@ -1326,7 +1328,7 @@ int32_t syncNodeSendMsgByInfo(const SNodeInfo* nodeInfo, SSyncNode* pSyncNode, S
pMsg->info.noResp = 1;
pSyncNode->FpSendMsg(&epSet, pMsg);
} else {
sTrace("syncNodeSendMsgByInfo pSyncNode->FpSendMsg is NULL");
sError("vgId:%d, sync send msg by info error, fp-send-msg is null", pSyncNode->vgId);
}
return 0;
}

16
source/libs/sync/src/syncRaftLog.c
View File

@ -326,6 +326,14 @@ static int32_t raftLogTruncate(struct SSyncLogStore* pLogStore, SyncIndex fromIn
ASSERT(0);
}
// event log
do {
char logBuf[128];
snprintf(logBuf, sizeof(logBuf), "wal truncate, from-index:%ld", fromIndex);
syncNodeEventLog(pData->pSyncNode, logBuf);
} while (0);
return code;
}
@ -463,6 +471,14 @@ int32_t logStoreTruncate(SSyncLogStore* pLogStore, SyncIndex fromIndex) {
ASSERT(0);
}
// event log
do {
char logBuf[128];
snprintf(logBuf, sizeof(logBuf), "wal truncate, from-index:%ld", fromIndex);
syncNodeEventLog(pData->pSyncNode, logBuf);
} while (0);
return 0;
}

15
source/libs/sync/src/syncReplication.c
View File

@ -151,14 +151,6 @@ int32_t syncNodeAppendEntriesPeersSnapshot2(SSyncNode* pSyncNode) {
for (int32_t i = 0; i < pSyncNode->pRaftCfg->batchSize; ++i) {
SSyncRaftEntry* pEntry = NULL;
int32_t code = pSyncNode->pLogStore->syncLogGetEntry(pSyncNode->pLogStore, getEntryIndex, &pEntry);
// event log
do {
char logBuf[128];
snprintf(logBuf, sizeof(logBuf), "get index:%d, code:%d, %s", getEntryIndex, code, tstrerror(terrno));
syncNodeEventLog(pSyncNode, logBuf);
} while (0);
if (code == 0) {
ASSERT(pEntry != NULL);
entryPArr[i] = pEntry;
@ -172,8 +164,11 @@ int32_t syncNodeAppendEntriesPeersSnapshot2(SSyncNode* pSyncNode) {
// event log
do {
char logBuf[128];
snprintf(logBuf, sizeof(logBuf), "build batch:%d", getCount);
char logBuf[128];
char host[64];
uint16_t port;
syncUtilU642Addr(pDestId->addr, host, sizeof(host), &port);
snprintf(logBuf, sizeof(logBuf), "build batch:%d for %s:%d", getCount, host, port);
syncNodeEventLog(pSyncNode, logBuf);
} while (0);

1
source/libs/sync/test/syncLogStoreTest.cpp
View File

@ -85,6 +85,7 @@ void logStoreTest() {
}
int main(int argc, char** argv) {
gRaftDetailLog = true;
tsAsyncLog = 0;
sDebugFlag = DEBUG_TRACE + DEBUG_SCREEN + DEBUG_FILE;

25
tests/script/tsim/sync/vnodesnapshot.sim
View File

@ -142,20 +142,33 @@ sql create table ct1 using stb tags(1000)
system sh/exec.sh -n dnode4 -s stop -x SIGINT
sql insert into ct1 values(now+0s, 10, 2.0, 3.0)
sql insert into ct1 values(now+1s, 11, 2.1, 3.1)(now+2s, -12, -2.2, -3.2)(now+3s, -13, -2.3, -3.3)
$N = 100
$count = 0
while $count < $N
$ms = 1591200000000 + $count
sql insert into ct1 values( $ms , $count , 2.1, 3.1)
$count = $count + 1
endw
#sql insert into ct1 values(now+0s, 10, 2.0, 3.0)
#sql insert into ct1 values(now+1s, 11, 2.1, 3.1)(now+2s, -12, -2.2, -3.2)(now+3s, -13, -2.3, -3.3)
#sql flush database db;
#system sh/exec.sh -n dnode4 -s start
sql insert into ct1 values(now+1s, 81, 8.1, 8.1)(now+2s, -92, -9.2, -9.2)(now+3s, -73, -7.3, -7.3)
#sql insert into ct1 values(now+1s, 81, 8.1, 8.1)(now+2s, -92, -9.2, -9.2)(now+3s, -73, -7.3, -7.3)
#system sh/exec.sh -n dnode1 -s stop -x SIGINT
#system sh/exec.sh -n dnode2 -s stop -x SIGINT
#system sh/exec.sh -n dnode3 -s stop -x SIGINT
sleep 5000
system sh/exec.sh -n dnode1 -s stop -x SIGINT
system sh/exec.sh -n dnode2 -s stop -x SIGINT
system sh/exec.sh -n dnode3 -s stop -x SIGINT
#system sh/exec.sh -n dnode4 -s stop -x SIGINT