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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.
*/
#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/commands.h"
#include "mongo/db/catalog/database.h"
#include "mongo/db/d_concurrency.h"
#include "mongo/db/curop-inl.h"
#include "mongo/db/index_builder.h"
#include "mongo/db/jsobj.h"
#include "mongo/db/kill_current_op.h"
#include "mongo/db/catalog/collection.h"
namespace mongo {
// from repl/rs.cpp
bool isCurrentlyAReplSetPrimary();
class CompactCmd : public Command {
public:
virtual LockType locktype() const { return NONE; }
virtual bool adminOnly() const { return false; }
virtual bool slaveOk() const { return true; }
virtual bool maintenanceMode() const { return true; }
virtual bool logTheOp() { return false; }
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 blocks the server and is slow. you can cancel with cancelOp()\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() : Command("compact") { }
virtual std::vector<BSONObj> stopIndexBuilds(const std::string& dbname,
const BSONObj& cmdObj) {
std::string systemIndexes = dbname+".system.indexes";
std::string coll = cmdObj.firstElement().valuestr();
std::string ns = dbname + "." + coll;
BSONObj criteria = BSON("ns" << systemIndexes << "op" << "insert" << "insert.ns" << ns);
return IndexBuilder::killMatchingIndexBuilds(criteria);
}
virtual bool run(const string& db, BSONObj& cmdObj, int, string& errmsg, BSONObjBuilder& result, bool fromRepl) {
string coll = cmdObj.firstElement().valuestr();
if( coll.empty() || db.empty() ) {
errmsg = "no collection name specified";
return false;
}
if( isCurrentlyAReplSetPrimary() && !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;
}
NamespaceString ns(db,coll);
if ( !ns.isNormal() ) {
errmsg = "bad namespace name";
return false;
}
if ( ns.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();
Lock::DBWrite lk(ns.ns());
BackgroundOperation::assertNoBgOpInProgForNs(ns.ns());
Client::Context ctx(ns);
Collection* collection = ctx.db()->getCollection(ns.ns());
if( ! collection ) {
errmsg = "namespace does not exist";
return false;
}
if ( collection->isCapped() ) {
errmsg = "cannot compact a capped collection";
return false;
}
log() << "compact " << ns << " begin, options: " << compactOptions.toString();
std::vector<BSONObj> indexesInProg = stopIndexBuilds(db, cmdObj);
StatusWith<CompactStats> status = collection->compact( &compactOptions );
if ( !status.isOK() )
return appendCommandStatus( result, status.getStatus() );
if ( status.getValue().corruptDocuments > 0 )
result.append("invalidObjects", status.getValue().corruptDocuments );
log() << "compact " << ns << " end";
IndexBuilder::restoreIndexes(indexesInProg);
return true;
}
};
static CompactCmd compactCmd;
}
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