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fix: fsync wal files and their meta if data size unsynced exceeds a limit

This commit is contained in:
benguang.zhao 2022-10-31 23:58:49 +08:00
parent bfb92713b4
commit cccfa17027
3 changed files with 34 additions and 4 deletions
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7
source/libs/wal/inc/walInt.h
View File

@ -34,6 +34,7 @@ typedef struct {
int64_t createTs;
int64_t closeTs;
int64_t fileSize;
int64_t syncedOffset;
} SWalFileInfo;
typedef struct WalIdxEntry {
@ -66,6 +67,12 @@ static inline int64_t walGetLastFileSize(SWal* pWal) {
return pInfo->fileSize;
}
static inline int64_t walGetLastFileCachedSize(SWal* pWal) {
if (taosArrayGetSize(pWal->fileInfoSet) == 0) return 0;
SWalFileInfo* pInfo = (SWalFileInfo*)taosArrayGetLast(pWal->fileInfoSet);
return (pInfo->fileSize - pInfo->syncedOffset);
}
static inline int64_t walGetLastFileFirstVer(SWal* pWal) {
if (taosArrayGetSize(pWal->fileInfoSet) == 0) return -1;
SWalFileInfo* pInfo = (SWalFileInfo*)taosArrayGetLast(pWal->fileInfoSet);

10
source/libs/wal/src/walMeta.c
View File

@ -589,6 +589,7 @@ int walRollFileInfo(SWal* pWal) {
pNewInfo->createTs = ts;
pNewInfo->closeTs = -1;
pNewInfo->fileSize = 0;
pNewInfo->syncedOffset = 0;
taosArrayPush(pArray, pNewInfo);
taosMemoryFree(pNewInfo);
return 0;
@ -739,6 +740,12 @@ static int walFindCurMetaVer(SWal* pWal) {
return metaVer;
}
void walUpdateSyncedOffset(SWal* pWal) {
SWalFileInfo* pFileInfo = walGetCurFileInfo(pWal);
if (pFileInfo == NULL) return;
pFileInfo->syncedOffset = pFileInfo->fileSize;
}
int walSaveMeta(SWal* pWal) {
int metaVer = walFindCurMetaVer(pWal);
char fnameStr[WAL_FILE_LEN];
@ -758,6 +765,9 @@ int walSaveMeta(SWal* pWal) {
return -1;
}
// update synced offset
(void)walUpdateSyncedOffset(pWal);
// flush to a tmpfile
n = walBuildTmpMetaName(pWal, tmpFnameStr);
ASSERT(n < sizeof(tmpFnameStr) && "Buffer overflow of file name");

21
source/libs/wal/src/walWrite.c
View File

@ -252,23 +252,36 @@ static FORCE_INLINE int32_t walCheckAndRoll(SWal *pWal) {
}
}
if (walGetLastFileCachedSize(pWal) > WAL_RECOV_SIZE_LIMIT / 2) {
if (walSaveMeta(pWal) < 0) {
return -1;
}
}
return 0;
}
int32_t walBeginSnapshot(SWal *pWal, int64_t ver) {
taosThreadMutexLock(&pWal->mutex);
pWal->vers.verInSnapshotting = ver;
wDebug("vgId:%d, wal begin snapshot for version %" PRId64 ", first ver %" PRId64 ", last ver %" PRId64,
pWal->cfg.vgId, ver, pWal->vers.firstVer, pWal->vers.lastVer);
// check file rolling
if (pWal->cfg.retentionPeriod == 0) {
taosThreadMutexLock(&pWal->mutex);
if (walGetLastFileSize(pWal) != 0) {
walRollImpl(pWal);
if (walRollImpl(pWal) < 0) {
wError("vgId:%d, failed to roll wal files since %s", pWal->cfg.vgId, terrstr());
goto _err;
}
}
}
taosThreadMutexUnlock(&pWal->mutex);
}
return 0;
_err:
taosThreadMutexUnlock(&pWal->mutex);
return -1;
}
int32_t walEndSnapshot(SWal *pWal) {