void ChunkManager::drop(){
uassert( 10174 , "config servers not all up" , configServer.allUp() );
map<string,ShardChunkVersion> seen;
log(1) << "ChunkManager::drop : " << _ns << endl;
// lock all shards so no one can do a split/migrate
for ( vector<Chunk*>::const_iterator i=_chunks.begin(); i!=_chunks.end(); i++ ){
Chunk * c = *i;
ShardChunkVersion& version = seen[ c->getShard() ];
if ( version )
continue;
version = lockNamespaceOnServer( c->getShard() , _ns );
if ( version )
continue;
// rollback
uassert( 10175 , "don't know how to rollback locks b/c drop can't lock all shards" , 0 );
}
log(1) << "ChunkManager::drop : " << _ns << "\t all locked" << endl;
// wipe my meta-data
_chunks.clear();
// delete data from mongod
for ( map<string,ShardChunkVersion>::iterator i=seen.begin(); i!=seen.end(); i++ ){
string shard = i->first;
ScopedDbConnection conn( shard );
conn->dropCollection( _ns );
conn.done();
}
log(1) << "ChunkManager::drop : " << _ns << "\t removed shard data" << endl;
// clean up database meta-data
uassert( 10176 , "no sharding data?" , _config->removeSharding( _ns ) );
_config->save();
// remove chunk data
Chunk temp(0);
ScopedDbConnection conn( temp.modelServer() );
conn->remove( temp.getNS() , BSON( "ns" << _ns ) );
conn.done();
log(1) << "ChunkManager::drop : " << _ns << "\t removed chunk data" << endl;
for ( map<string,ShardChunkVersion>::iterator i=seen.begin(); i!=seen.end(); i++ ){
ScopedDbConnection conn( i->first );
BSONObj res;
if ( ! setShardVersion( conn.conn() , _ns , 0 , true , res ) )
throw UserException( 8071 , (string)"OH KNOW, cleaning up after drop failed: " + res.toString() );
conn.done();
}
log(1) << "ChunkManager::drop : " << _ns << "\t DONE" << endl;
}
Shard * Shard::split( const BSONObj& m ){
uassert( "can't split as shard that doesn't have a manager" , _manager );
log(1) << " before split on: " << m << "\n"
<< "\t self : " << toString() << endl;
uassert( "locking namespace on server failed" , lockNamespaceOnServer( getServer() , _ns ) );
Shard * s = new Shard( _manager );
s->_ns = _ns;
s->_server = _server;
s->_min = m.getOwned();
s->_max = _max;
s->_markModified();
_markModified();
_manager->_shards.push_back( s );
_max = m.getOwned();
log(1) << " after split:\n"
<< "\t left : " << toString() << "\n"
<< "\t right: "<< s->toString() << endl;
_manager->save();
return s;
}
Chunk * Chunk::split( const BSONObj& m ){
uassert( 10165 , "can't split as shard that doesn't have a manager" , _manager );
log(1) << " before split on: " << m << "\n"
<< "\t self : " << toString() << endl;
uassert( 10166 , "locking namespace on server failed" , lockNamespaceOnServer( getShard() , _ns ) );
Chunk * s = new Chunk( _manager );
s->_ns = _ns;
s->_shard = _shard;
s->setMin(m.getOwned());
s->setMax(_max);
s->_markModified();
_markModified();
_manager->_chunks.push_back( s );
setMax(m.getOwned());
log(1) << " after split:\n"
<< "\t left : " << toString() << "\n"
<< "\t right: "<< s->toString() << endl;
_manager->save();
return s;
}
bool lockNamespaceOnServer( const Shard& shard, const string& ns ){
ScopedDbConnection conn( shard.getConnString() );
bool res = lockNamespaceOnServer( conn.conn() , ns );
conn.done();
return res;
}
