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69 lines
2.2 KiB
C++
69 lines
2.2 KiB
C++
// @file dur_journal.h
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/**
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* Copyright (C) 2010 10gen Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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namespace mongo {
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class AlignedBuilder;
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namespace dur {
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/** true if ok to cleanup journal files at termination. otherwise, files journal will be retained.
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*/
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extern bool okToCleanUp;
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/** at termination after db files closed & fsynced
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also after recovery
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closes and removes journal files
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@param log report in log that we are cleaning up if we actually do any work
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*/
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void journalCleanup(bool log = false);
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/** assure journal/ dir exists. throws */
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void journalMakeDir();
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/** check if time to rotate files; assure a file is open.
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done separately from the journal() call as we can do this part
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outside of lock.
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only called by durThread.
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*/
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void journalRotate();
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/** flag that something has gone wrong during writing to the journal
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(not for recovery mode)
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*/
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void journalingFailure(const char *msg);
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/** read lsn from disk from the last run before doing recovery */
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unsigned long long journalReadLSN();
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unsigned long long getLastDataFileFlushTime();
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/** never throws.
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@return true if there are any journal files in the journal dir.
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*/
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bool haveJournalFiles();
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// in case disk controller buffers writes
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const long long ExtraKeepTimeMs = 10000;
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const unsigned JournalCommitIntervalDefault = 100;
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}
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}
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