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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.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kStorage
#if defined(__linux__)
#include <sys/vfs.h>
#endif
#include "mongo/platform/basic.h"
#include "mongo/base/init.h"
#include "mongo/db/catalog/collection_options.h"
#include "mongo/db/jsobj.h"
#include "mongo/db/service_context.h"
#include "mongo/db/service_context_d.h"
#include "mongo/db/storage/kv/kv_storage_engine.h"
#include "mongo/db/storage/storage_engine_lock_file.h"
#include "mongo/db/storage/storage_engine_metadata.h"
#include "mongo/db/storage/storage_options.h"
#include "mongo/db/storage/wiredtiger/wiredtiger_global_options.h"
#include "mongo/db/storage/wiredtiger/wiredtiger_index.h"
#include "mongo/db/storage/wiredtiger/wiredtiger_kv_engine.h"
#include "mongo/db/storage/wiredtiger/wiredtiger_parameters.h"
#include "mongo/db/storage/wiredtiger/wiredtiger_record_store.h"
#include "mongo/db/storage/wiredtiger/wiredtiger_server_status.h"
#include "mongo/db/storage/wiredtiger/wiredtiger_util.h"
#include "mongo/util/log.h"
#include "mongo/util/processinfo.h"
namespace mongo {
namespace {
class WiredTigerFactory : public StorageEngine::Factory {
public:
virtual ~WiredTigerFactory() {}
virtual StorageEngine* create(const StorageGlobalParams& params,
const StorageEngineLockFile* lockFile) const {
if (lockFile && lockFile->createdByUncleanShutdown()) {
warning() << "Recovering data from the last clean checkpoint.";
}
#if defined(__linux__)
// This is from <linux/magic.h> but that isn't available on all systems.
// Note that the magic number for ext4 is the same as ext2 and ext3.
#define EXT4_SUPER_MAGIC 0xEF53
{
struct statfs fs_stats;
int ret = statfs(params.dbpath.c_str(), &fs_stats);
if (ret == 0 && fs_stats.f_type == EXT4_SUPER_MAGIC) {
log() << startupWarningsLog;
log() << "** WARNING: Using the XFS filesystem is strongly recommended with the "
"WiredTiger storage engine"
<< startupWarningsLog;
log() << "** See "
"http://dochub.mongodb.org/core/prodnotes-filesystem"
<< startupWarningsLog;
}
}
#endif
size_t cacheMB = WiredTigerUtil::getCacheSizeMB(wiredTigerGlobalOptions.cacheSizeGB);
const double memoryThresholdPercentage = 0.8;
ProcessInfo p;
if (p.supported()) {
if (cacheMB > memoryThresholdPercentage * p.getMemSizeMB()) {
log() << startupWarningsLog;
log() << "** WARNING: The configured WiredTiger cache size is more than "
<< memoryThresholdPercentage * 100 << "% of available RAM."
<< startupWarningsLog;
log() << "** See "
"http://dochub.mongodb.org/core/faq-memory-diagnostics-wt"
<< startupWarningsLog;
}
}
const bool ephemeral = false;
WiredTigerKVEngine* kv =
new WiredTigerKVEngine(getCanonicalName().toString(),
params.dbpath,
getGlobalServiceContext()->getFastClockSource(),
wiredTigerGlobalOptions.engineConfig,
cacheMB,
params.dur,
ephemeral,
params.repair,
params.readOnly);
kv->setRecordStoreExtraOptions(wiredTigerGlobalOptions.collectionConfig);
kv->setSortedDataInterfaceExtraOptions(wiredTigerGlobalOptions.indexConfig);
// Intentionally leaked.
new WiredTigerServerStatusSection(kv);
new WiredTigerEngineRuntimeConfigParameter(kv);
KVStorageEngineOptions options;
options.directoryPerDB = params.directoryperdb;
options.directoryForIndexes = wiredTigerGlobalOptions.directoryForIndexes;
options.forRepair = params.repair;
return new KVStorageEngine(kv, options);
}
virtual StringData getCanonicalName() const {
return kWiredTigerEngineName;
}
virtual Status validateCollectionStorageOptions(const BSONObj& options) const {
return WiredTigerRecordStore::parseOptionsField(options).getStatus();
}
virtual Status validateIndexStorageOptions(const BSONObj& options) const {
return WiredTigerIndex::parseIndexOptions(options).getStatus();
}
virtual Status validateMetadata(const StorageEngineMetadata& metadata,
const StorageGlobalParams& params) const {
Status status =
metadata.validateStorageEngineOption("directoryPerDB", params.directoryperdb);
if (!status.isOK()) {
return status;
}
status = metadata.validateStorageEngineOption("directoryForIndexes",
wiredTigerGlobalOptions.directoryForIndexes);
if (!status.isOK()) {
return status;
}
return Status::OK();
}
virtual BSONObj createMetadataOptions(const StorageGlobalParams& params) const {
BSONObjBuilder builder;
builder.appendBool("directoryPerDB", params.directoryperdb);
builder.appendBool("directoryForIndexes", wiredTigerGlobalOptions.directoryForIndexes);
return builder.obj();
}
bool supportsReadOnly() const final {
return true;
}
};
} // namespace
MONGO_INITIALIZER_WITH_PREREQUISITES(WiredTigerEngineInit, ("SetGlobalEnvironment"))
(InitializerContext* context) {
getGlobalServiceContext()->registerStorageEngine(kWiredTigerEngineName,
new WiredTigerFactory());
return Status::OK();
}
}
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