virtual void queryOp( Request& r ){ QueryMessage q( r.d() ); log(3) << "shard query: " << q.ns << " " << q.query << endl; if ( q.ntoreturn == 1 && strstr(q.ns, ".$cmd") ) throw UserException( 8010 , "something is wrong, shouldn't see a command here" ); ChunkManager * info = r.getChunkManager(); assert( info ); Query query( q.query ); vector<Chunk*> shards; info->getChunksForQuery( shards , query.getFilter() ); set<ServerAndQuery> servers; map<string,int> serverCounts; for ( vector<Chunk*>::iterator i = shards.begin(); i != shards.end(); i++ ){ servers.insert( ServerAndQuery( (*i)->getShard() , (*i)->getFilter() ) ); int& num = serverCounts[(*i)->getShard()]; num++; } if ( logLevel > 4 ){ StringBuilder ss; ss << " shard query servers: " << servers.size() << "\n"; for ( set<ServerAndQuery>::iterator i = servers.begin(); i!=servers.end(); i++ ){ const ServerAndQuery& s = *i; ss << " " << s.toString() << "\n"; } log() << ss.str(); } ClusteredCursor * cursor = 0; BSONObj sort = query.getSort(); if ( sort.isEmpty() ){ // 1. no sort, can just hit them in serial cursor = new SerialServerClusteredCursor( servers , q ); } else { int shardKeyOrder = info->getShardKey().canOrder( sort ); if ( shardKeyOrder ){ // 2. sort on shard key, can do in serial intelligently set<ServerAndQuery> buckets; for ( vector<Chunk*>::iterator i = shards.begin(); i != shards.end(); i++ ){ Chunk * s = *i; buckets.insert( ServerAndQuery( s->getShard() , s->getFilter() , s->getMin() ) ); } cursor = new SerialServerClusteredCursor( buckets , q , shardKeyOrder ); } else { // 3. sort on non-sharded key, pull back a portion from each server and iterate slowly cursor = new ParallelSortClusteredCursor( servers , q , sort ); } } assert( cursor ); log(5) << " cursor type: " << cursor->type() << endl; ShardedClientCursor * cc = new ShardedClientCursor( q , cursor ); if ( ! cc->sendNextBatch( r ) ){ delete( cursor ); return; } log(6) << "storing cursor : " << cc->getId() << endl; cursorCache.store( cc ); }
virtual void queryOp( Request& r ){ QueryMessage q( r.d() ); log(3) << "shard query: " << q.ns << " " << q.query << endl; if ( q.ntoreturn == 1 && strstr(q.ns, ".$cmd") ) throw UserException( "something is wrong, shouldn't see a command here" ); ShardManager * info = r.getShardManager(); assert( info ); Query query( q.query ); vector<Shard*> shards; info->getShardsForQuery( shards , query.getFilter() ); set<ServerAndQuery> servers; map<string,int> serverCounts; for ( vector<Shard*>::iterator i = shards.begin(); i != shards.end(); i++ ){ servers.insert( (*i)->getServer() ); int& num = serverCounts[(*i)->getServer()]; num++; } ShardedCursor * cursor = 0; BSONObj sort = query.getSort(); if ( sort.isEmpty() ){ // 1. no sort, can just hit them in serial cursor = new SerialServerShardedCursor( servers , q ); } else { int shardKeyOrder = info->getShardKey().canOrder( sort ); if ( shardKeyOrder ){ // 2. sort on shard key, can do in serial intelligently set<ServerAndQuery> buckets; for ( vector<Shard*>::iterator i = shards.begin(); i != shards.end(); i++ ){ Shard * s = *i; BSONObj extra = BSONObj(); if ( serverCounts[s->getServer()] > 1 ){ BSONObjBuilder b; s->getFilter( b ); extra = b.obj(); } buckets.insert( ServerAndQuery( s->getServer() , extra , s->getMin() ) ); } cursor = new SerialServerShardedCursor( buckets , q , shardKeyOrder ); } else { // 3. sort on non-sharded key, pull back a portion from each server and iterate slowly cursor = new ParallelSortShardedCursor( servers , q , sort ); } } assert( cursor ); if ( ! cursor->sendNextBatch( r ) ){ delete( cursor ); return; } log(6) << "storing cursor : " << cursor->getId() << endl; cursorCache.store( cursor ); }
virtual void queryOp( Request& r ){ QueryMessage q( r.d() ); log(3) << "shard query: " << q.ns << " " << q.query << endl; if ( q.ntoreturn == 1 && strstr(q.ns, ".$cmd") ) throw UserException( 8010 , "something is wrong, shouldn't see a command here" ); ChunkManagerPtr info = r.getChunkManager(); assert( info ); Query query( q.query ); set<Shard> shards; info->getShardsForQuery( shards , query.getFilter() ); set<ServerAndQuery> servers; for ( set<Shard>::iterator i = shards.begin(); i != shards.end(); i++ ){ servers.insert( ServerAndQuery( i->getConnString() , BSONObj() ) ); } if ( logLevel > 4 ){ StringBuilder ss; ss << " shard query servers: " << servers.size() << '\n'; for ( set<ServerAndQuery>::iterator i = servers.begin(); i!=servers.end(); i++ ){ const ServerAndQuery& s = *i; ss << " " << s.toString() << '\n'; } log() << ss.str(); } ClusteredCursor * cursor = 0; BSONObj sort = query.getSort(); if ( sort.isEmpty() ){ cursor = new SerialServerClusteredCursor( servers , q ); } else { cursor = new ParallelSortClusteredCursor( servers , q , sort ); } assert( cursor ); try { cursor->init(); log(5) << " cursor type: " << cursor->type() << endl; shardedCursorTypes.hit( cursor->type() ); if ( query.isExplain() ){ BSONObj explain = cursor->explain(); replyToQuery( 0 , r.p() , r.m() , explain ); delete( cursor ); return; } } catch(...) { delete cursor; throw; } ShardedClientCursorPtr cc (new ShardedClientCursor( q , cursor )); if ( ! cc->sendNextBatch( r ) ){ return; } log(6) << "storing cursor : " << cc->getId() << endl; cursorCache.store( cc ); }
virtual void queryOp( Request& r ){ QueryMessage q( r.d() ); log(3) << "shard query: " << q.ns << " " << q.query << endl; if ( q.ntoreturn == 1 && strstr(q.ns, ".$cmd") ) throw UserException( 8010 , "something is wrong, shouldn't see a command here" ); ChunkManagerPtr info = r.getChunkManager(); assert( info ); Query query( q.query ); vector<shared_ptr<ChunkRange> > shards; info->getChunksForQuery( shards , query.getFilter() ); set<ServerAndQuery> servers; for ( vector<shared_ptr<ChunkRange> >::iterator i = shards.begin(); i != shards.end(); i++ ){ shared_ptr<ChunkRange> c = *i; //servers.insert( ServerAndQuery( c->getShard().getConnString() , BSONObj() ) ); // ERH ERH ERH servers.insert( ServerAndQuery( c->getShard().getConnString() , c->getFilter() ) ); } if ( logLevel > 4 ){ StringBuilder ss; ss << " shard query servers: " << servers.size() << '\n'; for ( set<ServerAndQuery>::iterator i = servers.begin(); i!=servers.end(); i++ ){ const ServerAndQuery& s = *i; ss << " " << s.toString() << '\n'; } log() << ss.str(); } ClusteredCursor * cursor = 0; BSONObj sort = query.getSort(); if ( sort.isEmpty() ){ // 1. no sort, can just hit them in serial cursor = new SerialServerClusteredCursor( servers , q ); } else { int shardKeyOrder = info->getShardKey().canOrder( sort ); if ( shardKeyOrder ){ // 2. sort on shard key, can do in serial intelligently set<ServerAndQuery> buckets; for ( vector<shared_ptr<ChunkRange> >::iterator i = shards.begin(); i != shards.end(); i++ ){ shared_ptr<ChunkRange> s = *i; buckets.insert( ServerAndQuery( s->getShard().getConnString() , s->getFilter() , s->getMin() ) ); } cursor = new SerialServerClusteredCursor( buckets , q , shardKeyOrder ); } else { // 3. sort on non-sharded key, pull back a portion from each server and iterate slowly cursor = new ParallelSortClusteredCursor( servers , q , sort ); } } assert( cursor ); log(5) << " cursor type: " << cursor->type() << endl; shardedCursorTypes.hit( cursor->type() ); if ( query.isExplain() ){ BSONObj explain = cursor->explain(); replyToQuery( 0 , r.p() , r.m() , explain ); delete( cursor ); return; } ShardedClientCursorPtr cc (new ShardedClientCursor( q , cursor )); if ( ! cc->sendNextBatch( r ) ){ return; } log(6) << "storing cursor : " << cc->getId() << endl; cursorCache.store( cc ); }