void DurableImpl::commitAndStopDurThread() {
CommitNotifier::When when = commitNotify.now();
// There is always just one waiting anyways
flushRequested.notify_one();
// commitNotify.waitFor ensures that whatever was scheduled for journaling before this
// call has been persisted to the journal file. This does not mean that this data has been
// applied to the shared view yet though, that's why we wait for applyToDataFilesNotify.
applyToDataFilesNotify.waitFor(when);
// Flush the shared view to disk.
MongoFile::flushAll(true);
// Once the shared view has been flushed, we do not need the journal files anymore.
journalCleanup(true);
// Double check post-conditions
invariant(!haveJournalFiles());
shutdownRequested.store(1);
// Wait for the durability thread to terminate
log() << "Terminating durability thread ...";
_durThreadHandle.join();
}
void DurableImpl::syncDataAndTruncateJournal(OperationContext* txn) {
invariant(txn->lockState()->isW());
// Once this returns, all the outstanding journal has been applied to the data files and
// so it's safe to do the flushAll/journalCleanup below.
commitNow(txn);
// Flush the shared view to disk.
MongoFile::flushAll(true);
// Once the shared view has been flushed, we do not need the journal files anymore.
journalCleanup(true);
// Double check post-conditions
invariant(!haveJournalFiles());
}
void DurableImpl::syncDataAndTruncateJournal(OperationContext* txn) {
invariant(txn->lockState()->isW());
// a commit from the commit thread won't begin while we are in the write lock,
// but it may already be in progress and the end of that work is done outside
// (dbMutex) locks. This line waits for that to complete if already underway.
{
SimpleMutex::scoped_lock lk(commitJob.groupCommitMutex);
}
commitNow(txn);
MongoFile::flushAll(true);
journalCleanup();
invariant(!haveJournalFiles()); // Double check post-conditions
}
