mongodb/jstests/repl/pair2.js

// Pairing resync

var baseName = "jstests_pair2test";

ismaster = function( n ) {
    im = n.getDB( "admin" ).runCommand( { "ismaster" : 1 } );
    assert( im );
    return im.ismaster;
}

// spec small oplog for fast startup on 64bit machines
a = startMongod( "--port", "27018", "--dbpath", "/data/db/" + baseName + "-arbiter" );
l = startMongod( "--port", "27019", "--dbpath", "/data/db/" + baseName + "-left", "--pairwith", "127.0.0.1:27020", "127.0.0.1:27018", "--oplogSize", "1" );
r = startMongod( "--port", "27020", "--dbpath", "/data/db/" + baseName + "-right", "--pairwith", "127.0.0.1:27019", "127.0.0.1:27018", "--oplogSize", "1" );
l.setSlaveOk();

assert.soon( function() { return ( ismaster( l ) == 0 && ismaster( r ) == 1 ); } );

lz = l.getDB( baseName ).z
rz = r.getDB( baseName ).z

rz.save( { _id: new ObjectId() } );
assert.soon( function() { return lz.find().count() == 1; } );
assert.eq( 0, l.getDB( "admin" ).runCommand( { "resync" : 1 } ).ok );

stopMongod( 27019 );

big = new Array( 2000 ).toString();
for( i = 0; i < 1000; ++i )
rz.save( { _id: new ObjectId(), i: i, b: big } );

l = startMongoProgram( "mongod", "--port", "27019", "--dbpath", "/data/db/" + baseName + "-left", "--pairwith", "127.0.0.1:27020", "127.0.0.1:27018", "--oplogSize", "1" );
l.setSlaveOk();
assert.soon( function() { return 1 == l.getDB( "admin" ).runCommand( { "resync" : 1 } ).ok; } );

assert.soon( function() { return l.getDBNames().indexOf( baseName ) != -1; } );
lz = l.getDB( baseName ).z
assert.soon( function() { return 1001 == lz.find().count(); } );
assert.eq( 1, lz.find( { i: 0 } ).count() );
assert.eq( 1, lz.find( { i: 999 } ).count() );

assert.eq( 0, l.getDB( "admin" ).runCommand( { "resync" : 1 } ).ok );