text: /*
   *    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 <atomic>
  #include <string>
  
  #include "mongo/platform/atomic_proxy.h"
  #include "mongo/platform/atomic_word.h"
  
  /*
   * 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 {
      // Default data directory for mongod when running in non-config server mode.
      static const char* kDefaultDbPath;
  
      // Default data directory for mongod when running as the config database of
      // a sharded cluster.
      static const char* kDefaultConfigDbPath;
  
      // --storageEngine
      // storage engine for this instance of mongod.
      std::string engine = "wiredTiger";
  
      // True if --storageEngine was passed on the command line, and false otherwise.
      bool engineSetByUser = false;
  
      // The directory where the mongod instance stores its data.
      std::string dbpath = kDefaultDbPath;
  
      // --upgrade
      // Upgrades the on-disk data format of the files specified by the --dbpath to the
      // latest version, if needed.
      bool upgrade = false;
  
      // --repair
      // Runs a repair routine on all databases. This is equivalent to shutting down and
      // running the repairDatabase database command on all databases.
      bool repair = false;
  
      // --repairpath
      // Specifies the root directory containing MongoDB data files to use for the --repair
      // operation.
      // Default: A _tmp directory within the path specified by the dbPath option.
      std::string repairpath;
  
      // The intention here is to enable the journal by default if we are running on a 64 bit system.
      bool dur = (sizeof(void*) == 8);  // --dur durability (now --journal)
  
      // --journalCommitInterval
      static const int kMaxJournalCommitIntervalMs;
      AtomicInt32 journalCommitIntervalMs;
  
      // --notablescan
      // no table scans allowed
      AtomicBool noTableScan{false};
  
      // --directoryperdb
      // Stores each database’s files in its own folder in the data directory.
      // When applied to an existing system, the directoryPerDB option alters
      // the storage pattern of the data directory.
      bool directoryperdb = false;
  
      // --syncdelay
      // Controls how much time can pass before MongoDB flushes data to the data files
      // via an fsync operation.
      // Do not set this value on production systems.
      // In almost every situation, you should use the default setting.
      static const double kMaxSyncdelaySecs;
      AtomicDouble syncdelay{60.0};  // seconds between fsyncs
  
      bool readOnly = false;
  };
  
  extern StorageGlobalParams storageGlobalParams;
  
  }  // namespace mongo
  