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// Do parallel ops with migrates occurring
var st = new ShardingTest({ shards : 10, mongos : 2, verbose : 2 });
jsTest.log( "Doing parallel operations..." );
//Stop balancer, since it'll just get in the way of these
st.stopBalancer();
var mongos = st.s0;
var admin = mongos.getDB("admin");
var coll = st.s.getCollection( jsTest.name() + ".coll" );
var numDocs = 1024 * 1024;
var dataSize = 1024; // bytes, must be power of 2
var data = "x";
while( data.length < dataSize ) data += data;
var bulk = coll.initializeUnorderedBulkOp();
for( var i = 0; i < numDocs; i++ ){
bulk.insert({ _id: i, data: data });
}
assert.writeOK(bulk.execute());
// Make sure everything got inserted
assert.eq( numDocs, coll.find().itcount() );
jsTest.log( "Inserted " + sh._dataFormat( dataSize * numDocs ) + " of data." );
// Shard collection
st.shardColl( coll, { _id : 1 }, false );
st.printShardingStatus();
jsTest.log( "Sharded collection now initialized, starting migrations..." );
var checkMigrate = function(){ print( "Result of migrate : " ); printjson( this ); };
// Creates a number of migrations of random chunks to diff shard servers
var ops = [];
for(var i = 0; i < st._connections.length; i++) {
ops.push({
op: "command",
ns: "admin",
command: {
moveChunk: "" + coll,
find: { _id: { "#RAND_INT" : [ 0, numDocs ] }},
to: st._connections[i].shardName,
_waitForDelete: true
},
showResult: true
});
}
// TODO: Also migrate output collection
jsTest.log( "Starting migrations now..." );
var bid = benchStart({ ops : ops,
host : st.s.host,
parallel : 1,
handleErrors : false });
//#######################
// Tests during migration
var numTests = 5;
for( var t = 0; t < numTests; t++ ){
jsTest.log( "Test #" + t );
var mongos = st.s1; // use other mongos so we get stale shard versions
var coll = mongos.getCollection( coll + "" );
var outputColl = mongos.getCollection( coll + "_output" );
var numTypes = 32;
var map = function(){ emit( this._id % 32 /* must be hardcoded */, { c : 1 } ); };
var reduce = function( k, vals ){
var total = 0;
for( var i = 0; i < vals.length; i++ ) total += vals[i].c;
return { c : total };
};
printjson( coll.find({ _id : 0 }).itcount() );
jsTest.log( "Starting new mapReduce run #" + t );
//assert.eq( coll.find().itcount(), numDocs )
coll.getMongo().getDB("admin").runCommand({ setParameter : 1, traceExceptions : true });
printjson( coll.mapReduce( map, reduce, { out : { replace : outputColl.getName(), db : outputColl.getDB() + "" } }) );
jsTest.log( "MapReduce run #" + t + " finished." );
assert.eq( outputColl.find().itcount(), numTypes );
outputColl.find().forEach( function( x ){
assert.eq( x.value.c, numDocs / numTypes );
});
}
printjson( benchFinish( bid ) );
st.stop();
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