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sync refactor

This commit is contained in:
Minghao Li 2022-03-23 17:56:32 +08:00
parent 996886e726
commit d5188f14f9
4 changed files with 109 additions and 139 deletions
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10
include/libs/sync/sync.h
View File

@ -158,17 +158,17 @@ typedef struct SSyncNode SSyncNode;
int32_t syncInit();
void syncCleanUp();
int64_t syncStart(const SSyncInfo* pSyncInfo);
void syncStop(int64_t rid);
int32_t syncReconfig(int64_t rid, const SSyncCfg* pSyncCfg);
int32_t syncPropose(int64_t rid, const SRpcMsg* pMsg, bool isWeak);
int64_t syncStart(const SSyncInfo* pSyncInfo);
void syncStop(int64_t rid);
int32_t syncReconfig(int64_t rid, const SSyncCfg* pSyncCfg);
int32_t syncPropose(int64_t rid, const SRpcMsg* pMsg, bool isWeak);
ESyncState syncGetMyRole(int64_t rid);
// propose with sequence number, to implement linearizable semantics
int32_t syncPropose2(int64_t rid, const SRpcMsg* pMsg, bool isWeak, uint64_t seqNum);
// for compatibility, the same as syncPropose
int32_t syncForwardToPeer(int64_t rid, const SRpcMsg* pMsg, bool isWeak);
int32_t syncForwardToPeer(int64_t rid, const SRpcMsg* pMsg, bool isWeak);
extern int32_t sDebugFlag;

225
source/libs/sync/src/syncAppendEntries.c
View File

@ -155,102 +155,60 @@ int32_t syncNodeOnAppendEntriesCb(SSyncNode* ths, SyncAppendEntries* pMsg) {
// accept request
if (pMsg->term == ths->pRaftStore->currentTerm && ths->state == TAOS_SYNC_STATE_FOLLOWER && logOK) {
/*
bool preMatch = false;
if (pMsg->prevLogIndex == SYNC_INDEX_INVALID &&
ths->pLogStore->getLastIndex(ths->pLogStore) == SYNC_INDEX_INVALID) {
preMatch = true;
}
if (pMsg->prevLogIndex >= SYNC_INDEX_BEGIN && pMsg->prevLogIndex <=
ths->pLogStore->getLastIndex(ths->pLogStore)) { SSyncRaftEntry* pPreEntry = logStoreGetEntry(ths->pLogStore,
pMsg->prevLogIndex); assert(pPreEntry != NULL); if (pMsg->prevLogTerm == pPreEntry->term) { preMatch = true;
// 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 = logStoreGetEntry(ths->pLogStore, extraIndex);
assert(pExtraEntry != NULL);
SSyncRaftEntry* pAppendEntry = syncEntryDeserialize(pMsg->data, pMsg->dataLen);
assert(pAppendEntry != NULL);
// 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 = logStoreGetEntry(ths->pLogStore, index);
assert(pRollBackEntry != NULL);
SRpcMsg rpcMsg;
syncEntry2OriginalRpc(pRollBackEntry, &rpcMsg);
ths->pFsm->FpRollBackCb(ths->pFsm, &rpcMsg, pRollBackEntry->index, pRollBackEntry->isWeak, 0, ths->state);
rpcFreeCont(rpcMsg.pCont);
syncEntryDestory(pRollBackEntry);
}
syncEntryDestory(pPreEntry);
}
sTrace(
"syncNodeOnAppendEntriesCb --> accept, pMsg->term:%lu, ths->pRaftStore->currentTerm:%lu, "
"ths->state:%d, logOK:%d, preMatch:%d",
pMsg->term, ths->pRaftStore->currentTerm, ths->state, logOK, preMatch);
if (preMatch) {
*/
{
// 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;
if (hasExtraEntries && hasAppendEntries) {
// not conflict by default
bool conflict = false;
SyncIndex extraIndex = pMsg->prevLogIndex + 1;
SSyncRaftEntry* pExtraEntry = logStoreGetEntry(ths->pLogStore, extraIndex);
assert(pExtraEntry != NULL);
SSyncRaftEntry* pAppendEntry = syncEntryDeserialize(pMsg->data, pMsg->dataLen);
assert(pAppendEntry != NULL);
// 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 = logStoreGetEntry(ths->pLogStore, index);
assert(pRollBackEntry != NULL);
SRpcMsg rpcMsg;
syncEntry2OriginalRpc(pRollBackEntry, &rpcMsg);
ths->pFsm->FpRollBackCb(ths->pFsm, &rpcMsg, pRollBackEntry->index, pRollBackEntry->isWeak, 0, ths->state);
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) {
ths->pFsm->FpPreCommitCb(ths->pFsm, &rpcMsg, pAppendEntry->index, pAppendEntry->isWeak, 2, ths->state);
}
}
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);
assert(pAppendEntry != NULL);
// delete confict entries
ths->pLogStore->truncate(ths->pLogStore, extraIndex);
// append new entries
ths->pLogStore->appendEntry(ths->pLogStore, pAppendEntry);
@ -260,55 +218,62 @@ int32_t syncNodeOnAppendEntriesCb(SSyncNode* ths, SyncAppendEntries* pMsg) {
syncEntry2OriginalRpc(pAppendEntry, &rpcMsg);
if (ths->pFsm != NULL) {
if (ths->pFsm->FpPreCommitCb != NULL) {
ths->pFsm->FpPreCommitCb(ths->pFsm, &rpcMsg, pAppendEntry->index, pAppendEntry->isWeak, 3, ths->state);
ths->pFsm->FpPreCommitCb(ths->pFsm, &rpcMsg, pAppendEntry->index, pAppendEntry->isWeak, 2, ths->state);
}
}
rpcFreeCont(rpcMsg.pCont);
// free memory
syncEntryDestory(pAppendEntry);
} else if (!hasExtraEntries && !hasAppendEntries) {
// do nothing
} else {
assert(0);
}
SyncAppendEntriesReply* pReply = syncAppendEntriesReplyBuild();
pReply->srcId = ths->myRaftId;
pReply->destId = pMsg->srcId;
pReply->term = ths->pRaftStore->currentTerm;
pReply->success = true;
// free memory
syncEntryDestory(pExtraEntry);
syncEntryDestory(pAppendEntry);
if (hasAppendEntries) {
pReply->matchIndex = pMsg->prevLogIndex + 1;
} else {
pReply->matchIndex = pMsg->prevLogIndex;
}
} else if (hasExtraEntries && !hasAppendEntries) {
// do nothing
} else if (!hasExtraEntries && hasAppendEntries) {
SSyncRaftEntry* pAppendEntry = syncEntryDeserialize(pMsg->data, pMsg->dataLen);
assert(pAppendEntry != NULL);
// append new entries
ths->pLogStore->appendEntry(ths->pLogStore, pAppendEntry);
// pre commit
SRpcMsg rpcMsg;
syncAppendEntriesReply2RpcMsg(pReply, &rpcMsg);
syncNodeSendMsgById(&pReply->destId, ths, &rpcMsg);
syncEntry2OriginalRpc(pAppendEntry, &rpcMsg);
if (ths->pFsm != NULL) {
if (ths->pFsm->FpPreCommitCb != NULL) {
ths->pFsm->FpPreCommitCb(ths->pFsm, &rpcMsg, pAppendEntry->index, pAppendEntry->isWeak, 3, ths->state);
}
}
rpcFreeCont(rpcMsg.pCont);
syncAppendEntriesReplyDestroy(pReply);
// free memory
syncEntryDestory(pAppendEntry);
} else if (!hasExtraEntries && !hasAppendEntries) {
// do nothing
} else {
assert(0);
}
/*
else {
SyncAppendEntriesReply* pReply = syncAppendEntriesReplyBuild();
pReply->srcId = ths->myRaftId;
pReply->destId = pMsg->srcId;
pReply->term = ths->pRaftStore->currentTerm;
pReply->success = false;
pReply->matchIndex = SYNC_INDEX_INVALID;
SyncAppendEntriesReply* pReply = syncAppendEntriesReplyBuild();
pReply->srcId = ths->myRaftId;
pReply->destId = pMsg->srcId;
pReply->term = ths->pRaftStore->currentTerm;
pReply->success = true;
SRpcMsg rpcMsg;
syncAppendEntriesReply2RpcMsg(pReply, &rpcMsg);
syncNodeSendMsgById(&pReply->destId, ths, &rpcMsg);
syncAppendEntriesReplyDestroy(pReply);
}
*/
if (hasAppendEntries) {
pReply->matchIndex = pMsg->prevLogIndex + 1;
} else {
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) {

7
source/libs/sync/src/syncCommit.c
View File

@ -63,7 +63,14 @@ void syncMaybeAdvanceCommitIndex(SSyncNode* pSyncNode) {
if (pEntry->term == pSyncNode->pRaftStore->currentTerm) {
// update commit index
newCommitIndex = index;
sTrace("syncMaybeAdvanceCommitIndex maybe to update, newCommitIndex:%ld commit, pSyncNode->commitIndex:%ld",
newCommitIndex, pSyncNode->commitIndex);
break;
} else {
sTrace(
"syncMaybeAdvanceCommitIndex can not commit due to term not equal, pEntry->term:%lu, "
"pSyncNode->pRaftStore->currentTerm:%lu",
pEntry->term, pSyncNode->pRaftStore->currentTerm);
}
}
}

6
source/libs/sync/test/syncLogStoreCheck.cpp
View File

@ -26,7 +26,7 @@ SSyncFSM* pFsm;
SWal* pWal;
SSyncNode* pSyncNode;
SSyncNode* syncNodeInit(const char *path) {
SSyncNode* syncNodeInit(const char* path) {
syncInfo.vgId = 1234;
syncInfo.rpcClient = gSyncIO->clientRpc;
syncInfo.FpSendMsg = syncIOSendMsg;
@ -78,9 +78,7 @@ SSyncNode* syncNodeInit(const char *path) {
return pSyncNode;
}
SSyncNode* logStoreCheck(const char *path) { return syncNodeInit(path); }
SSyncNode* logStoreCheck(const char* path) { return syncNodeInit(path); }
int main(int argc, char** argv) {
// taosInitLog((char *)"syncTest.log", 100000, 10);