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/*
* Copyright (C) 2013 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* 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. See the
* GNU Affero General Public License for more details.
*
* 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/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#pragma once
#include <string>
/*
* This file defines the storage for options that come from the command line related to data file
* persistence. Many executables that can access data files directly such as mongod and certain
* tools use these variables, but each executable may have a different set of command line flags
* that allow the user to change a different subset of these options.
*/
namespace mongo {
struct StorageGlobalParams {
StorageGlobalParams() :
#ifdef _WIN32
dbpath("\\data\\db\\"),
#else
dbpath("/data/db/"),
#endif
directoryperdb(false),
lenForNewNsFiles(16 * 1024 * 1024),
preallocj(true),
journalCommitInterval(0), // 0 means use default
quota(false), quotaFiles(8),
syncdelay(60),
useHints(true)
{
repairpath = dbpath;
dur = false;
#if defined(_DURABLEDEFAULTON)
dur = true;
#endif
if (sizeof(void*) == 8)
dur = true;
#if defined(_DURABLEDEFAULTOFF)
dur = false;
#endif
}
std::string dbpath;
bool directoryperdb;
std::string repairpath;
unsigned lenForNewNsFiles;
bool preallocj; // --nopreallocj no preallocation of journal files
bool prealloc; // --noprealloc no preallocation of data files
bool smallfiles; // --smallfiles allocate smaller data files
bool noTableScan; // --notablescan no table scans allowed
bool dur; // --dur durability (now --journal)
unsigned journalCommitInterval; // group/batch commit interval ms
/** --durOptions 7 dump journal and terminate without doing anything further
--durOptions 4 recover and terminate without listening
*/
enum { // bits to be ORed
DurDumpJournal = 1, // dump diagnostics on the journal during recovery
DurScanOnly = 2, // don't do any real work, just scan and dump if dump specified
DurRecoverOnly = 4, // terminate after recovery step
DurParanoid = 8, // paranoid mode enables extra checks
DurAlwaysCommit = 16, // do a group commit every time the writelock is released
DurAlwaysRemap = 32, // remap the private view after every group commit (may lag to the
// next write lock acquisition, but will do all files then)
DurNoCheckSpace = 64 // don't check that there is enough room for journal files before
// startup (for diskfull tests)
};
int durOptions; // --durOptions <n> for debugging
bool quota; // --quota
int quotaFiles; // --quotaFiles
double syncdelay; // seconds between fsyncs
bool useHints; // only off if --nohints
};
extern StorageGlobalParams storageGlobalParams;
bool isJournalingEnabled();
void setJournalCommitInterval(unsigned newValue);
unsigned getJournalCommitInterval();
// This is not really related to persistence, but mongos and the other executables share code
// and we use this function to determine at runtime which executable we are in.
bool isMongos();
} // namespace mongo
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