bool TRI_WaitReplicationApplier (TRI_replication_applier_t* applier,
uint64_t sleepTime) {
if (CheckTerminateFlag(applier)) {
return false;
}
if (sleepTime > 0) {
LOG_TRACE("replication applier going to sleep for %llu ns", (unsigned long long) sleepTime);
TRI_LockCondition(&applier->_runStateChangeCondition);
TRI_TimedWaitCondition(&applier->_runStateChangeCondition, sleepTime);
TRI_UnlockCondition(&applier->_runStateChangeCondition);
if (CheckTerminateFlag(applier)) {
return false;
}
}
return true;
}
void TRI_CleanupVocBase (void* data) {
TRI_vocbase_t* vocbase = data;
TRI_vector_pointer_t collections;
assert(vocbase->_state == 1);
TRI_InitVectorPointer(&collections, TRI_UNKNOWN_MEM_ZONE);
while (true) {
size_t n;
size_t i;
TRI_col_type_e type;
// keep initial _state value as vocbase->_state might change during compaction loop
int state = vocbase->_state;
if (state == 2) {
// shadows must be cleaned before collections are handled
// otherwise the shadows might still hold barriers on collections
// and collections cannot be closed properly
CleanupShadows(vocbase, true);
}
// copy all collections
TRI_READ_LOCK_COLLECTIONS_VOCBASE(vocbase);
TRI_CopyDataVectorPointer(&collections, &vocbase->_collections);
TRI_READ_UNLOCK_COLLECTIONS_VOCBASE(vocbase);
n = collections._length;
for (i = 0; i < n; ++i) {
TRI_vocbase_col_t* collection;
TRI_primary_collection_t* primary;
collection = collections._buffer[i];
TRI_READ_LOCK_STATUS_VOCBASE_COL(collection);
primary = collection->_collection;
if (primary == NULL) {
TRI_READ_UNLOCK_STATUS_VOCBASE_COL(collection);
continue;
}
type = primary->base._type;
TRI_READ_UNLOCK_STATUS_VOCBASE_COL(collection);
// now release the lock and maybe unload the collection or some datafiles
if (TRI_IS_DOCUMENT_COLLECTION(type)) {
CleanupDocumentCollection((TRI_document_collection_t*) primary);
}
}
if (vocbase->_state >= 1) {
// server is still running, clean up unused shadows
CleanupShadows(vocbase, false);
TRI_LockCondition(&vocbase->_cleanupCondition);
TRI_TimedWaitCondition(&vocbase->_cleanupCondition, CLEANUP_INTERVAL);
TRI_UnlockCondition(&vocbase->_cleanupCondition);
}
if (state == 3) {
// server shutdown
break;
}
}
TRI_DestroyVectorPointer(&collections);
}
void TRI_CompactorVocBase (void* data) {
TRI_vocbase_t* vocbase;
TRI_vector_pointer_t collections;
vocbase = data;
assert(vocbase->_state == 1);
TRI_InitVectorPointer(&collections, TRI_UNKNOWN_MEM_ZONE);
while (true) {
int state;
// keep initial _state value as vocbase->_state might change during compaction loop
state = vocbase->_state;
// check if compaction is currently disallowed
if (CheckAndLockCompaction(vocbase)) {
// compaction is currently allowed
size_t i, n;
// copy all collections
TRI_READ_LOCK_COLLECTIONS_VOCBASE(vocbase);
TRI_CopyDataVectorPointer(&collections, &vocbase->_collections);
TRI_READ_UNLOCK_COLLECTIONS_VOCBASE(vocbase);
n = collections._length;
for (i = 0; i < n; ++i) {
TRI_vocbase_col_t* collection;
TRI_primary_collection_t* primary;
TRI_col_type_e type;
bool doCompact;
bool worked;
collection = collections._buffer[i];
if (! TRI_TRY_READ_LOCK_STATUS_VOCBASE_COL(collection)) {
// if we can't acquire the read lock instantly, we continue directly
// we don't want to stall here for too long
continue;
}
primary = collection->_collection;
if (primary == NULL) {
TRI_READ_UNLOCK_STATUS_VOCBASE_COL(collection);
continue;
}
worked = false;
doCompact = primary->base._info._doCompact;
type = primary->base._info._type;
// for document collection, compactify datafiles
if (TRI_IS_DOCUMENT_COLLECTION(type)) {
if (collection->_status == TRI_VOC_COL_STATUS_LOADED && doCompact) {
TRI_barrier_t* ce;
// check whether someone else holds a read-lock on the compaction lock
if (! TRI_TryWriteLockReadWriteLock(&primary->_compactionLock)) {
// someone else is holding the compactor lock, we'll not compact
TRI_READ_UNLOCK_STATUS_VOCBASE_COL(collection);
continue;
}
ce = TRI_CreateBarrierCompaction(&primary->_barrierList);
if (ce == NULL) {
// out of memory
LOG_WARNING("out of memory when trying to create a barrier element");
}
else {
worked = CompactifyDocumentCollection((TRI_document_collection_t*) primary);
TRI_FreeBarrier(ce);
}
// read-unlock the compaction lock
TRI_WriteUnlockReadWriteLock(&primary->_compactionLock);
}
}
TRI_READ_UNLOCK_STATUS_VOCBASE_COL(collection);
if (worked) {
// signal the cleanup thread that we worked and that it can now wake up
TRI_LockCondition(&vocbase->_cleanupCondition);
TRI_SignalCondition(&vocbase->_cleanupCondition);
TRI_UnlockCondition(&vocbase->_cleanupCondition);
}
}
UnlockCompaction(vocbase);
}
if (state != 2 && vocbase->_state == 1) {
// only sleep while server is still running
TRI_LockCondition(&vocbase->_compactorCondition);
TRI_TimedWaitCondition(&vocbase->_compactorCondition, (uint64_t) COMPACTOR_INTERVAL);
TRI_UnlockCondition(&vocbase->_compactorCondition);
}
if (state == 2) {
// server shutdown
break;
}
}
TRI_DestroyVectorPointer(&collections);
LOG_TRACE("shutting down compactor thread");
}
void TRI_CleanupVocBase (void* data) {
TRI_vocbase_t* vocbase;
TRI_vector_pointer_t collections;
uint64_t iterations = 0;
vocbase = data;
assert(vocbase);
assert(vocbase->_state == 1);
TRI_InitVectorPointer(&collections, TRI_UNKNOWN_MEM_ZONE);
while (true) {
int state;
// keep initial _state value as vocbase->_state might change during cleanup loop
state = vocbase->_state;
++iterations;
if (state == 2) {
// shadows must be cleaned before collections are handled
// otherwise the shadows might still hold barriers on collections
// and collections cannot be closed properly
CleanupCursors(vocbase, true);
}
// check if we can get the compactor lock exclusively
if (TRI_CheckAndLockCompactorVocBase(vocbase)) {
size_t i, n;
TRI_col_type_e type;
// copy all collections
TRI_READ_LOCK_COLLECTIONS_VOCBASE(vocbase);
TRI_CopyDataVectorPointer(&collections, &vocbase->_collections);
TRI_READ_UNLOCK_COLLECTIONS_VOCBASE(vocbase);
n = collections._length;
for (i = 0; i < n; ++i) {
TRI_vocbase_col_t* collection;
TRI_primary_collection_t* primary;
collection = collections._buffer[i];
TRI_READ_LOCK_STATUS_VOCBASE_COL(collection);
primary = collection->_collection;
if (primary == NULL) {
TRI_READ_UNLOCK_STATUS_VOCBASE_COL(collection);
continue;
}
type = primary->base._info._type;
TRI_READ_UNLOCK_STATUS_VOCBASE_COL(collection);
// we're the only ones that can unload the collection, so using
// the collection pointer outside the lock is ok
// maybe cleanup indexes, unload the collection or some datafiles
if (TRI_IS_DOCUMENT_COLLECTION(type)) {
TRI_document_collection_t* document = (TRI_document_collection_t*) primary;
// clean indexes?
if (iterations % (uint64_t) CLEANUP_INDEX_ITERATIONS == 0) {
document->cleanupIndexes(document);
}
CleanupDocumentCollection(document);
}
}
TRI_UnlockCompactorVocBase(vocbase);
}
if (vocbase->_state >= 1) {
// server is still running, clean up unused shadows
if (iterations % CLEANUP_SHADOW_ITERATIONS == 0) {
CleanupCursors(vocbase, false);
}
// clean up expired compactor locks
TRI_CleanupCompactorVocBase(vocbase);
if (state == 1) {
TRI_LockCondition(&vocbase->_cleanupCondition);
TRI_TimedWaitCondition(&vocbase->_cleanupCondition, (uint64_t) CLEANUP_INTERVAL);
TRI_UnlockCondition(&vocbase->_cleanupCondition);
}
}
if (state == 3) {
// server shutdown
break;
}
}
TRI_DestroyVectorPointer(&collections);
LOG_TRACE("shutting down cleanup thread");
}
