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/**
* Test write concern with w parameter when writing directly to the config servers works as expected
*/
function writeToConfigTest(){
jsTestLog("Testing data writes to config server with write concern");
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 - it gets automatically upconverted to w:majority
assert.writeOK(confDB.settings.update({ _id: 'balancer' },
{ $set: { stopped: true }},
{ writeConcern: { w: 1 }}));
// Write concerns other than w:1 and w:majority should fail.
assert.writeError(confDB.settings.update({ _id: 'balancer' },
{ $set: { stopped: true }},
{ writeConcern: { w: 2 }}));
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(){
jsTestLog("Testing metadata writes to config server with write concern");
var st = new ShardingTest({ shards: 1, rs: true, 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;
var largeStr = new Array(1024*128).toString();
assert.soon(function() {
var bulk = coll.initializeUnorderedBulkOp();
for (var i = 0; i < 100; i++) {
bulk.insert({x: x++, largeStr: largeStr});
}
assert.writeOK(bulk.execute({w: 'majority', wtimeout: 60 * 1000}));
currChunks = chunkCount();
return currChunks > initChunks;
}, function() { return "currChunks: " + currChunks + ", initChunks: " + initChunks; });
st.stop();
}
writeToConfigTest();
configTest();
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