mongodb/jstests/noPassthroughWithMongod/background.js

// background indexing test during inserts.

assert( db.getName() == "test" );

t = db.bg1;
t.drop();

var a = new Mongo( db.getMongo().host ).getDB( db.getName() );

var bulk = t.initializeUnorderedBulkOp();
for( var i = 0; i < 100000; i++ ) {
    bulk.insert({ y: 'aaaaaaaaaaaa', i: i });
    if( i % 10000 == 0 ) {
        assert.writeOK(bulk.execute());
        bulk = t.initializeUnorderedBulkOp();
        print(i);
    }
}

// start bg indexing
a.bg1.ensureIndex({i:1}, {name:"i_1", background:true});

// add more data
bulk = t.initializeUnorderedBulkOp();
for( var i = 0; i < 100000; i++ ) {
    bulk.insert({ i: i });
    if( i % 10000 == 0 ) {
        printjson( db.currentOp() );
        assert.writeOK(bulk.execute());
        bulk = t.initializeUnorderedBulkOp();
        print(i);
    }
}

assert.writeOK(bulk.execute());

printjson( db.currentOp() );

for( var i = 0; i < 40; i++ ) {
    if( db.currentOp().inprog.length == 0 )
        break;
    print("waiting");
    sleep(1000);
}

var idx = t.getIndexes();
assert( idx[1].key.i == 1 );