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/// compact.cpp
/**
* 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,b
* 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::kCommand
#include <string>
#include <vector>
#include "mongo/db/auth/action_set.h"
#include "mongo/db/auth/action_type.h"
#include "mongo/db/auth/privilege.h"
#include "mongo/db/background.h"
#include "mongo/db/catalog/collection.h"
#include "mongo/db/catalog/database.h"
#include "mongo/db/commands.h"
#include "mongo/db/concurrency/d_concurrency.h"
#include "mongo/db/curop.h"
#include "mongo/db/db_raii.h"
#include "mongo/db/index_builder.h"
#include "mongo/db/jsobj.h"
#include "mongo/db/repl/replication_coordinator_global.h"
#include "mongo/util/log.h"
namespace mongo {
using std::string;
using std::stringstream;
class CompactCmd : public BasicCommand {
public:
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return false;
}
virtual bool adminOnly() const {
return false;
}
virtual bool slaveOk() const {
return true;
}
virtual bool maintenanceMode() const {
return true;
}
virtual void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) {
ActionSet actions;
actions.addAction(ActionType::compact);
out->push_back(Privilege(parseResourcePattern(dbname, cmdObj), actions));
}
virtual void help(stringstream& help) const {
help << "compact collection\n"
"warning: this operation locks the database and is slow. you can cancel with "
"killOp()\n"
"{ compact : <collection_name>, [force:<bool>], [validate:<bool>],\n"
" [paddingFactor:<num>], [paddingBytes:<num>] }\n"
" force - allows to run on a replica set primary\n"
" validate - check records are noncorrupt before adding to newly compacting "
"extents. slower but safer (defaults to true in this version)\n";
}
CompactCmd() : BasicCommand("compact") {}
virtual bool run(OperationContext* opCtx,
const string& db,
const BSONObj& cmdObj,
string& errmsg,
BSONObjBuilder& result) {
NamespaceString nss = parseNsCollectionRequired(db, cmdObj);
repl::ReplicationCoordinator* replCoord = repl::getGlobalReplicationCoordinator();
if (replCoord->getMemberState().primary() && !cmdObj["force"].trueValue()) {
errmsg =
"will not run compact on an active replica set primary as this is a slow blocking "
"operation. use force:true to force";
return false;
}
if (!nss.isNormal()) {
errmsg = "bad namespace name";
return false;
}
if (nss.isSystem()) {
// items in system.* cannot be moved as there might be pointers to them
// i.e. system.indexes entries are pointed to from NamespaceDetails
errmsg = "can't compact a system namespace";
return false;
}
CompactOptions compactOptions;
if (cmdObj["preservePadding"].trueValue()) {
compactOptions.paddingMode = CompactOptions::PRESERVE;
if (cmdObj.hasElement("paddingFactor") || cmdObj.hasElement("paddingBytes")) {
errmsg = "cannot mix preservePadding and paddingFactor|paddingBytes";
return false;
}
} else if (cmdObj.hasElement("paddingFactor") || cmdObj.hasElement("paddingBytes")) {
compactOptions.paddingMode = CompactOptions::MANUAL;
if (cmdObj.hasElement("paddingFactor")) {
compactOptions.paddingFactor = cmdObj["paddingFactor"].Number();
if (compactOptions.paddingFactor < 1 || compactOptions.paddingFactor > 4) {
errmsg = "invalid padding factor";
return false;
}
}
if (cmdObj.hasElement("paddingBytes")) {
compactOptions.paddingBytes = cmdObj["paddingBytes"].numberInt();
if (compactOptions.paddingBytes < 0 ||
compactOptions.paddingBytes > (1024 * 1024)) {
errmsg = "invalid padding bytes";
return false;
}
}
}
if (cmdObj.hasElement("validate"))
compactOptions.validateDocuments = cmdObj["validate"].trueValue();
AutoGetDb autoDb(opCtx, db, MODE_X);
Database* const collDB = autoDb.getDb();
Collection* collection = collDB ? collDB->getCollection(opCtx, nss) : nullptr;
auto view =
collDB && !collection ? collDB->getViewCatalog()->lookup(opCtx, nss.ns()) : nullptr;
// If db/collection does not exist, short circuit and return.
if (!collDB || !collection) {
if (view)
return appendCommandStatus(
result, {ErrorCodes::CommandNotSupportedOnView, "can't compact a view"});
else
return appendCommandStatus(
result, {ErrorCodes::NamespaceNotFound, "collection does not exist"});
}
OldClientContext ctx(opCtx, nss.ns());
BackgroundOperation::assertNoBgOpInProgForNs(nss.ns());
log() << "compact " << nss.ns() << " begin, options: " << compactOptions;
StatusWith<CompactStats> status = collection->compact(opCtx, &compactOptions);
if (!status.isOK())
return appendCommandStatus(result, status.getStatus());
if (status.getValue().corruptDocuments > 0)
result.append("invalidObjects", status.getValue().corruptDocuments);
log() << "compact " << nss.ns() << " end";
return true;
}
};
static CompactCmd compactCmd;
}
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