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/*
* Copyright (C) 2014 MongoDB 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 the
* mmap v1 storage engine.
*/
namespace mongo {
struct MMAPV1Options {
MMAPV1Options() :
lenForNewNsFiles(16 * 1024 * 1024),
preallocj(true),
prealloc(false),
journalCommitInterval(0), // 0 means use default
quota(false),
quotaFiles(8) {}
// --nssize
// Specifies the default size for namespace files, which are files that end in .ns.
// Each collection and index counts as a namespace.
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
// --journalCommitInterval
// The maximum amount of time the mongod process allows between journal operations.
// Values can range from 2 to 300 milliseconds. Lower values increase the durability
// of the journal, at the expense of disk performance.
unsigned journalCommitInterval; // group/batch commit interval ms
// --journalOptions 7 dump journal and terminate without doing anything further
// --journalOptions 4 recover and terminate without listening
enum { // bits to be ORed
JournalDumpJournal = 1, // dump diagnostics on the journal during recovery
JournalScanOnly = 2, // don't do any real work, just scan and dump if dump
// specified
JournalRecoverOnly = 4, // terminate after recovery step
JournalParanoid = 8, // paranoid mode enables extra checks
JournalAlwaysCommit = 16, // do a group commit every time the writelock is released
JournalAlwaysRemap = 32, // remap the private view after every group commit
// (may lag to the next write lock acquisition,
// but will do all files then)
JournalNoCheckSpace = 64 // don't check that there is enough room for journal files
// before startup (for diskfull tests)
};
int journalOptions; // --journalOptions <n> for debugging
// --quota
// Enables a maximum limit for the number data files each database can have.
// When running with the --quota option, MongoDB has a maximum of 8 data files
// per database. Adjust the quota with --quotaFiles.
bool quota;
// --quotaFiles
// Modifies the limit on the number of data files per database.
// --quotaFiles option requires that you set --quota.
int quotaFiles; // --quotaFiles
};
extern MMAPV1Options mmapv1GlobalOptions;
} // namespace mongo
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