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homework-jianmu/source/dnode/vnode/src/sma/smaCommit.c

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/*
* Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
*
* This program is free software: you can use, redistribute, and/or modify
* it under the terms of the GNU Affero General Public License, version 3
* or later ("AGPL"), as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "sma.h"
static int32_t tdProcessRSmaSyncPreCommitImpl(SSma *pSma);
static int32_t tdProcessRSmaSyncCommitImpl(SSma *pSma);
static int32_t tdProcessRSmaSyncPostCommitImpl(SSma *pSma);
static int32_t tdProcessRSmaAsyncPreCommitImpl(SSma *pSma);
static int32_t tdProcessRSmaAsyncCommitImpl(SSma *pSma);
static int32_t tdProcessRSmaAsyncPostCommitImpl(SSma *pSma);
static int32_t tdCleanupQTaskInfoFiles(SSma *pSma, SRSmaStat *pRSmaStat);
/**
* @brief Only applicable to Rollup SMA
*
* @param pSma
* @return int32_t
*/
int32_t smaSyncPreCommit(SSma *pSma) { return tdProcessRSmaSyncPreCommitImpl(pSma); }
/**
* @brief Only applicable to Rollup SMA
*
* @param pSma
* @return int32_t
*/
int32_t smaSyncCommit(SSma *pSma) { return tdProcessRSmaSyncCommitImpl(pSma); }
/**
* @brief Only applicable to Rollup SMA
*
* @param pSma
* @return int32_t
*/
int32_t smaSyncPostCommit(SSma *pSma) { return tdProcessRSmaSyncPostCommitImpl(pSma); }
/**
* @brief Only applicable to Rollup SMA
*
* @param pSma
* @return int32_t
*/
int32_t smaAsyncPreCommit(SSma *pSma) { return tdProcessRSmaAsyncPreCommitImpl(pSma); }
/**
* @brief Only applicable to Rollup SMA
*
* @param pSma
* @return int32_t
*/
int32_t smaAsyncCommit(SSma *pSma) { return tdProcessRSmaAsyncCommitImpl(pSma); }
/**
* @brief Only applicable to Rollup SMA
*
* @param pSma
* @return int32_t
*/
int32_t smaAsyncPostCommit(SSma *pSma) { return tdProcessRSmaAsyncPostCommitImpl(pSma); }
/**
* @brief set rsma trigger stat active
*
* @param pSma
* @return int32_t
*/
int32_t smaBegin(SSma *pSma) {
SSmaEnv *pSmaEnv = SMA_RSMA_ENV(pSma);
if (!pSmaEnv) {
return TSDB_CODE_SUCCESS;
}
SRSmaStat *pRSmaStat = (SRSmaStat *)SMA_ENV_STAT(pSmaEnv);
int8_t rsmaTriggerStat =
atomic_val_compare_exchange_8(RSMA_TRIGGER_STAT(pRSmaStat), TASK_TRIGGER_STAT_PAUSED, TASK_TRIGGER_STAT_ACTIVE);
switch (rsmaTriggerStat) {
case TASK_TRIGGER_STAT_PAUSED: {
smaDebug("vgId:%d, rsma trigger stat from paused to active", SMA_VID(pSma));
break;
}
case TASK_TRIGGER_STAT_INIT: {
atomic_store_8(RSMA_TRIGGER_STAT(pRSmaStat), TASK_TRIGGER_STAT_ACTIVE);
smaDebug("vgId:%d, rsma trigger stat from init to active", SMA_VID(pSma));
break;
}
default: {
atomic_store_8(RSMA_TRIGGER_STAT(pRSmaStat), TASK_TRIGGER_STAT_ACTIVE);
smaError("vgId:%d, rsma trigger stat %" PRIi8 " is unexpected", SMA_VID(pSma), rsmaTriggerStat);
break;
}
}
return TSDB_CODE_SUCCESS;
}
/**
* @brief pre-commit for rollup sma(sync commit).
* 1) set trigger stat of rsma timer TASK_TRIGGER_STAT_PAUSED.
* 2) wait for all triggered fetch tasks to finish
* 3) perform persist task for qTaskInfo
*
* @param pSma
* @return int32_t
*/
static int32_t tdProcessRSmaSyncPreCommitImpl(SSma *pSma) {
SSmaEnv *pSmaEnv = SMA_RSMA_ENV(pSma);
if (!pSmaEnv) {
return TSDB_CODE_SUCCESS;
}
SSmaStat *pStat = SMA_ENV_STAT(pSmaEnv);
SRSmaStat *pRSmaStat = SMA_STAT_RSMA(pStat);
// step 1: set rsma stat paused
atomic_store_8(RSMA_TRIGGER_STAT(pRSmaStat), TASK_TRIGGER_STAT_PAUSED);
// step 2: wait for all triggered fetch tasks to finish
int32_t nLoops = 0;
while (1) {
if (T_REF_VAL_GET(pStat) == 0) {
smaDebug("vgId:%d, rsma fetch tasks are all finished", SMA_VID(pSma));
break;
} else {
smaDebug("vgId:%d, rsma fetch tasks are not all finished yet", SMA_VID(pSma));
}
++nLoops;
if (nLoops > 1000) {
sched_yield();
nLoops = 0;
}
}
// step 3: perform persist task for qTaskInfo
pRSmaStat->commitAppliedVer = pSma->pVnode->state.applied;
tdRSmaPersistExecImpl(pRSmaStat, RSMA_INFO_HASH(pRSmaStat));
smaDebug("vgId:%d, rsma pre commit success", SMA_VID(pSma));
return TSDB_CODE_SUCCESS;
}
/**
* @brief commit for rollup sma
*
* @param pSma
* @return int32_t
*/
static int32_t tdProcessRSmaSyncCommitImpl(SSma *pSma) {
SSmaEnv *pSmaEnv = SMA_RSMA_ENV(pSma);
if (!pSmaEnv) {
return TSDB_CODE_SUCCESS;
}
return TSDB_CODE_SUCCESS;
}
static int32_t tdCleanupQTaskInfoFiles(SSma *pSma, SRSmaStat *pRSmaStat) {
SVnode *pVnode = pSma->pVnode;
int64_t committed = pRSmaStat->commitAppliedVer;
TdDirPtr pDir = NULL;
TdDirEntryPtr pDirEntry = NULL;
char dir[TSDB_FILENAME_LEN];
const char *pattern = "v[0-9]+qtaskinfo\\.ver([0-9]+)?$";
regex_t regex;
int code = 0;
tdGetVndDirName(TD_VID(pVnode), tfsGetPrimaryPath(pVnode->pTfs), VNODE_RSMA_DIR, true, dir);
// Resource allocation and init
if ((code = regcomp(&regex, pattern, REG_EXTENDED)) != 0) {
char errbuf[128];
regerror(code, &regex, errbuf, sizeof(errbuf));
smaWarn("vgId:%d, rsma post commit, regcomp for %s failed since %s", TD_VID(pVnode), dir, errbuf);
return TSDB_CODE_FAILED;
}
if ((pDir = taosOpenDir(dir)) == NULL) {
regfree(&regex);
terrno = TAOS_SYSTEM_ERROR(errno);
smaDebug("vgId:%d, rsma post commit, open dir %s failed since %s", TD_VID(pVnode), dir, terrstr());
return TSDB_CODE_FAILED;
}
int32_t dirLen = strlen(dir);
char *dirEnd = POINTER_SHIFT(dir, dirLen);
regmatch_t regMatch[2];
while ((pDirEntry = taosReadDir(pDir)) != NULL) {
char *entryName = taosGetDirEntryName(pDirEntry);
if (!entryName) {
continue;
}
code = regexec(&regex, entryName, 2, regMatch, 0);
if (code == 0) {
// match
int64_t version = -1;
sscanf((const char *)POINTER_SHIFT(entryName, regMatch[1].rm_so), "%" PRIi64, &version);
if ((version < committed) && (version > -1)) {
strncpy(dirEnd, entryName, TSDB_FILENAME_LEN - dirLen);
if (taosRemoveFile(dir) != 0) {
terrno = TAOS_SYSTEM_ERROR(errno);
smaWarn("vgId:%d, committed version:%" PRIi64 ", failed to remove %s since %s", TD_VID(pVnode), committed,
dir, terrstr());
} else {
smaDebug("vgId:%d, committed version:%" PRIi64 ", success to remove %s", TD_VID(pVnode), committed, dir);
}
}
} else if (code == REG_NOMATCH) {
// not match
smaTrace("vgId:%d, rsma post commit, not match %s", TD_VID(pVnode), entryName);
continue;
} else {
// has other error
char errbuf[128];
regerror(code, &regex, errbuf, sizeof(errbuf));
smaWarn("vgId:%d, rsma post commit, regexec failed since %s", TD_VID(pVnode), errbuf);
taosCloseDir(&pDir);
regfree(&regex);
return TSDB_CODE_FAILED;
}
}
taosCloseDir(&pDir);
regfree(&regex);
return TSDB_CODE_SUCCESS;
}
// SQTaskFile ======================================================
// int32_t tCmprQTaskFile(void const *lhs, void const *rhs) {
// int64_t *lCommitted = *(int64_t *)lhs;
// SQTaskFile *rQTaskF = (SQTaskFile *)rhs;
// if (lCommitted < rQTaskF->commitID) {
// return -1;
// } else if (lCommitted > rQTaskF->commitID) {
// return 1;
// }
// return 0;
// }
#if 0
/**
* @brief At most time, there is only one qtaskinfo file committed latest in aTaskFile. Sometimes, there would be
* multiple qtaskinfo files supporting snapshot replication.
*
* @param pSma
* @param pRSmaStat
* @return int32_t
*/
static int32_t tdCleanupQTaskInfoFiles(SSma *pSma, SRSmaStat *pRSmaStat) {
SVnode *pVnode = pSma->pVnode;
int64_t committed = pRSmaStat->commitAppliedVer;
SArray *aTaskFile = pRSmaStat->aTaskFile;
void *qTaskFile = taosArraySearch(aTaskFile, committed, tCmprQTaskFile, TD_LE);
return TSDB_CODE_SUCCESS;
}
#endif
/**
* @brief post-commit for rollup sma
* 1) clean up the outdated qtaskinfo files
*
* @param pSma
* @return int32_t
*/
static int32_t tdProcessRSmaSyncPostCommitImpl(SSma *pSma) {
SVnode *pVnode = pSma->pVnode;
if (!VND_IS_RSMA(pVnode)) {
return TSDB_CODE_SUCCESS;
}
SRSmaStat *pRSmaStat = SMA_RSMA_STAT(pSma);
// cleanup outdated qtaskinfo files
tdCleanupQTaskInfoFiles(pSma, pRSmaStat);
return TSDB_CODE_SUCCESS;
}
/**
* @brief Rsma async commit implementation(only do some necessary light weighted task)
* 1) set rsma stat TASK_TRIGGER_STAT_PAUSED
* 2) Wait all running fetch task finish to fetch and put submitMsg into level 2/3 wQueue(blocking level 1 write)
*
* @param pSma
* @return int32_t
*/
static int32_t tdProcessRSmaAsyncPreCommitImpl(SSma *pSma) {
SSmaEnv *pEnv = SMA_RSMA_ENV(pSma);
if (!pEnv) {
return TSDB_CODE_SUCCESS;
}
SSmaStat *pStat = SMA_ENV_STAT(pEnv);
SRSmaStat *pRSmaStat = SMA_STAT_RSMA(pStat);
// step 1: set rsma stat
atomic_store_8(RSMA_TRIGGER_STAT(pRSmaStat), TASK_TRIGGER_STAT_PAUSED);
atomic_store_8(RSMA_COMMIT_STAT(pRSmaStat), 1);
pRSmaStat->commitAppliedVer = pSma->pVnode->state.applied;
ASSERT(pRSmaStat->commitAppliedVer > 0);
// step 2: wait for all triggered fetch tasks to finish
int32_t nLoops = 0;
while (1) {
if (T_REF_VAL_GET(pStat) == 0) {
smaDebug("vgId:%d, rsma commit, fetch tasks are all finished", SMA_VID(pSma));
break;
} else {
smaDebug("vgId:%d, rsma commit, fetch tasks are not all finished yet", SMA_VID(pSma));
}
++nLoops;
if (nLoops > 1000) {
sched_yield();
nLoops = 0;
}
}
/**
* @brief step 3: consume the SubmitReq in buffer
* 1) This is high cost task and should not put in asyncPreCommit originally.
* 2) But, if put in asyncCommit, would trigger taskInfo cloning frequently.
*/
if (tdRSmaProcessExecImpl(pSma, RSMA_EXEC_COMMIT) < 0) {
return TSDB_CODE_FAILED;
}
smaInfo("vgId:%d, rsma commit, wait for all items to be consumed, TID:%p", SMA_VID(pSma), (void*)taosGetSelfPthreadId());
nLoops = 0;
while (atomic_load_64(&pRSmaStat->nBufItems) > 0) {
++nLoops;
if (nLoops > 1000) {
sched_yield();
nLoops = 0;
}
}
smaInfo("vgId:%d, rsma commit, all items are consumed, TID:%p", SMA_VID(pSma), (void *)taosGetSelfPthreadId());
if (tdRSmaPersistExecImpl(pRSmaStat, RSMA_INFO_HASH(pRSmaStat)) < 0) {
return TSDB_CODE_FAILED;
}
smaInfo("vgId:%d, rsma commit, operator state commited, TID:%p", SMA_VID(pSma), (void *)taosGetSelfPthreadId());
#if 0 // consuming task of qTaskInfo clone
// step 4: swap queue/qall and iQueue/iQall
// lock
// taosWLockLatch(SMA_ENV_LOCK(pEnv));
ASSERT(RSMA_INFO_HASH(pRSmaStat));
void *pIter = taosHashIterate(RSMA_INFO_HASH(pRSmaStat), NULL);
while (pIter) {
SRSmaInfo *pInfo = *(SRSmaInfo **)pIter;
TSWAP(pInfo->iQall, pInfo->qall);
TSWAP(pInfo->iQueue, pInfo->queue);
TSWAP(pInfo->iTaskInfo[0], pInfo->taskInfo[0]);
TSWAP(pInfo->iTaskInfo[1], pInfo->taskInfo[1]);
pIter = taosHashIterate(RSMA_INFO_HASH(pRSmaStat), pIter);
}
// unlock
// taosWUnLockLatch(SMA_ENV_LOCK(pEnv));
#endif
return TSDB_CODE_SUCCESS;
}
/**
* @brief commit for rollup sma
*
* @param pSma
* @return int32_t
*/
static int32_t tdProcessRSmaAsyncCommitImpl(SSma *pSma) {
SSmaEnv *pSmaEnv = SMA_RSMA_ENV(pSma);
if (!pSmaEnv) {
return TSDB_CODE_SUCCESS;
}
#if 0
SRSmaStat *pRSmaStat = (SRSmaStat *)SMA_ENV_STAT(pSmaEnv);
// perform persist task for qTaskInfo operator
if (tdRSmaPersistExecImpl(pRSmaStat, RSMA_INFO_HASH(pRSmaStat)) < 0) {
return TSDB_CODE_FAILED;
}
#endif
return TSDB_CODE_SUCCESS;
}
/**
* @brief Migrate rsmaInfo from iRsmaInfo to rsmaInfo if rsma infoHash not empty.
*
* @param pSma
* @return int32_t
*/
static int32_t tdProcessRSmaAsyncPostCommitImpl(SSma *pSma) {
SSmaEnv *pEnv = SMA_RSMA_ENV(pSma);
if (!pEnv) {
return TSDB_CODE_SUCCESS;
}
SRSmaStat *pRSmaStat = (SRSmaStat *)SMA_ENV_STAT(pEnv);
SArray *rsmaDeleted = NULL;
// step 1: merge qTaskInfo and iQTaskInfo
// lock
// taosWLockLatch(SMA_ENV_LOCK(pEnv));
void *pIter = NULL;
while ((pIter = taosHashIterate(RSMA_INFO_HASH(pRSmaStat), pIter))) {
tb_uid_t *pSuid = (tb_uid_t *)taosHashGetKey(pIter, NULL);
SRSmaInfo *pRSmaInfo = *(SRSmaInfo **)pIter;
if (RSMA_INFO_IS_DEL(pRSmaInfo)) {
int32_t refVal = T_REF_VAL_GET(pRSmaInfo);
if (refVal == 0) {
if (!rsmaDeleted) {
if ((rsmaDeleted = taosArrayInit(1, sizeof(tb_uid_t)))) {
taosArrayPush(rsmaDeleted, pSuid);
}
}
} else {
smaDebug(
"vgId:%d, rsma async post commit, not free rsma info since ref is %d although already deleted for "
"table:%" PRIi64,
SMA_VID(pSma), refVal, *pSuid);
}
continue;
}
#if 0
if (pRSmaInfo->taskInfo[0]) {
if (pRSmaInfo->iTaskInfo[0]) {
SRSmaInfo *pRSmaInfo = *(SRSmaInfo **)pRSmaInfo->iTaskInfo[0];
tdFreeRSmaInfo(pSma, pRSmaInfo, false);
pRSmaInfo->iTaskInfo[0] = NULL;
}
} else {
TSWAP(pRSmaInfo->taskInfo[0], pRSmaInfo->iTaskInfo[0]);
}
taosHashPut(RSMA_INFO_HASH(pRSmaStat), pSuid, sizeof(tb_uid_t), pIter, sizeof(pIter));
smaDebug("vgId:%d, rsma async post commit, migrated from iRsmaInfoHash for table:%" PRIi64, SMA_VID(pSma), *pSuid);
#endif
}
for (int32_t i = 0; i < taosArrayGetSize(rsmaDeleted); ++i) {
tb_uid_t *pSuid = taosArrayGet(rsmaDeleted, i);
void *pRSmaInfo = taosHashGet(RSMA_INFO_HASH(pRSmaStat), pSuid, sizeof(tb_uid_t));
if ((pRSmaInfo = *(SRSmaInfo **)pRSmaInfo)) {
tdFreeRSmaInfo(pSma, pRSmaInfo, true);
smaDebug(
"vgId:%d, rsma async post commit, free rsma info since already deleted and ref is 0 for "
"table:%" PRIi64,
SMA_VID(pSma), *pSuid);
}
taosHashRemove(RSMA_INFO_HASH(pRSmaStat), pSuid, sizeof(tb_uid_t));
}
taosArrayDestroy(rsmaDeleted);
// unlock
// taosWUnLockLatch(SMA_ENV_LOCK(pEnv));
// step 2: cleanup outdated qtaskinfo files
tdCleanupQTaskInfoFiles(pSma, pRSmaStat);
atomic_store_8(RSMA_COMMIT_STAT(pRSmaStat), 0);
return TSDB_CODE_SUCCESS;
}
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