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// Do parallel ops with migrates occurring
// @tags: [requires_sharding]
(function() {
'use strict';
var st = new ShardingTest({shards: 10, mongos: 2, verbose: 2});
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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