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/**
* Test write concern with w parameter when writing directly to the config servers will
* not cause an error.
*/
function writeToConfigTest(){
var st = new ShardingTest({ shards: 2 });
var confDB = st.s.getDB( 'config' );
assert.writeOK(confDB.settings.update({ _id: 'balancer' },
{ $set: { stopped: true }},
{ writeConcern: { w: 'majority' }}));
// w:1 should still work
assert.writeOK(confDB.settings.update({ _id: 'balancer' },
{ $set: { stopped: true }},
{ writeConcern: { w: 1 }}));
st.stop();
}
/**
* Test write concern with w parameter will not cause an error when writes to mongos
* would trigger writes to config servers (in this test, split chunks is used).
*/
function configTest( configCount ){
var st = new ShardingTest({ shards: 1, config: configCount,
rs: { oplogSize: 10 }, other: { chunkSize: 1 }});
var mongos = st.s;
var testDB = mongos.getDB( 'test' );
var coll = testDB.user;
testDB.adminCommand({ enableSharding: testDB.getName() });
testDB.adminCommand({ shardCollection: coll.getFullName(), key: { x: 1 }});
var chunkCount = function() {
return mongos.getDB( 'config' ).chunks.find().count();
};
var initChunks = chunkCount();
var currChunks = initChunks;
var gleObj = null;
var x = 0;
while( currChunks <= initChunks ){
assert.writeOK(coll.insert({ x: x++ }, { writeConcern: { w: 'majority' }}));
currChunks = chunkCount();
}
st.stop();
}
writeToConfigTest();
configTest( 1 );
configTest( 3 ); // sync cluster config servers
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