bool compact(const string& ns, string &errmsg, bool validate, BSONObjBuilder& result, double pf, int pb) {
massert( 14028, "bad ns", NamespaceString::normal(ns.c_str()) );
massert( 14027, "can't compact a system namespace", !str::contains(ns, ".system.") ); // items in system.indexes cannot be moved there are pointers to those disklocs in NamespaceDetails
bool ok;
{
writelock lk;
BackgroundOperation::assertNoBgOpInProgForNs(ns.c_str());
Client::Context ctx(ns);
NamespaceDetails *d = nsdetails(ns.c_str());
massert( 13660, str::stream() << "namespace " << ns << " does not exist", d );
massert( 13661, "cannot compact capped collection", !d->capped );
log() << "compact " << ns << " begin" << endl;
if( pf != 0 || pb != 0 ) {
log() << "paddingFactor:" << pf << " paddingBytes:" << pb << endl;
}
try {
ok = _compact(ns.c_str(), d, errmsg, validate, result, pf, pb);
}
catch(...) {
log() << "compact " << ns << " end (with error)" << endl;
throw;
}
log() << "compact " << ns << " end" << endl;
}
return ok;
}
Command& CommandCache::alloc( NodePtr node, LocalNodePtr localNode,
const uint64_t size )
{
EQ_TS_THREAD( _thread );
const Cache which = (size > Packet::minSize) ? CACHE_BIG : CACHE_SMALL;
_compact( which );
Command& command = _newCommand( which );
command._alloc( node, localNode, size );
return command;
}
Command& CommandCache::alloc( NodePtr node, LocalNodePtr localNode,
const uint64_t size )
{
EQ_TS_THREAD( _thread );
EQASSERTINFO( size < EQ_BIT48,
"Out-of-sync network stream: packet size " << size << "?" );
const Cache which = (size > Packet::minSize) ? CACHE_BIG : CACHE_SMALL;
_compact( which );
Command& command = _newCommand( which );
command.alloc_( node, localNode, size );
return command;
}
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;
}
string ns = db + '.' + coll;
if ( ! NamespaceString::normal(ns.c_str()) ) {
errmsg = "bad namespace name";
return false;
}
// parameter validation to avoid triggering assertions in compact()
if ( str::contains(ns, ".system.") ) {
errmsg = "can't compact a system namespace";
return false;
}
{
Lock::DBWrite lk(ns);
Client::Context ctx(ns);
NamespaceDetails *d = nsdetails(ns);
if( ! d ) {
errmsg = "namespace does not exist";
return false;
}
if ( d->isCapped() ) {
errmsg = "cannot compact a capped collection";
return false;
}
}
double pf = 1.0;
int pb = 0;
// preservePadding trumps all other compact methods
bool preservePadding = false;
// useDefaultPadding is used to track whether or not a padding requirement was passed in
// if it wasn't than UsePowerOf2Sizes will be maintained when compacting
bool useDefaultPadding = true;
if (cmdObj.hasElement("preservePadding")) {
preservePadding = cmdObj["preservePadding"].trueValue();
useDefaultPadding = false;
}
if( cmdObj.hasElement("paddingFactor") ) {
if (preservePadding == true) {
errmsg = "preservePadding is incompatible with paddingFactor";
return false;
}
useDefaultPadding = false;
pf = cmdObj["paddingFactor"].Number();
verify( pf >= 1.0 && pf <= 4.0 );
}
if( cmdObj.hasElement("paddingBytes") ) {
if (preservePadding == true) {
errmsg = "preservePadding is incompatible with paddingBytes";
return false;
}
useDefaultPadding = false;
pb = (int) cmdObj["paddingBytes"].Number();
verify( pb >= 0 && pb <= 1024 * 1024 );
}
bool validate = !cmdObj.hasElement("validate") || cmdObj["validate"].trueValue(); // default is true at the moment
massert( 14028, "bad ns", NamespaceString::normal(ns.c_str()) );
massert( 14027, "can't compact a system namespace", !str::contains(ns, ".system.") ); // items in system.indexes cannot be moved there are pointers to those disklocs in NamespaceDetails
bool ok;
{
Lock::DBWrite lk(ns);
BackgroundOperation::assertNoBgOpInProgForNs(ns.c_str());
Client::Context ctx(ns);
NamespaceDetails *d = nsdetails(ns);
massert( 13660, str::stream() << "namespace " << ns << " does not exist", d );
massert( 13661, "cannot compact capped collection", !d->isCapped() );
log() << "compact " << ns << " begin" << endl;
std::vector<BSONObj> indexesInProg = stopIndexBuilds(db, cmdObj);
if( pf != 0 || pb != 0 ) {
log() << "paddingFactor:" << pf << " paddingBytes:" << pb << endl;
}
try {
ok = _compact(ns.c_str(), d, errmsg, validate,
result, pf, pb, useDefaultPadding, preservePadding);
}
catch(...) {
log() << "compact " << ns << " end (with error)" << endl;
throw;
}
log() << "compact " << ns << " end" << endl;
IndexBuilder::restoreIndexes(indexesInProg);
}
return ok;
}
