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var verifyOutput = function(out) {
printjson(out);
assert.eq(out.counts.input, 51200, "input count is wrong");
assert.eq(out.counts.emit, 51200, "emit count is wrong");
assert.gt(out.counts.reduce, 99, "reduce count is wrong");
assert.eq(out.counts.output, 512, "output count is wrong");
};
var st = new ShardingTest(
{shards: 2, verbose: 1, mongos: 1, other: {chunkSize: 1, enableBalancer: true}});
st.adminCommand({enablesharding: "mrShard"});
st.ensurePrimaryShard('mrShard', 'shard0001');
st.adminCommand({shardcollection: "mrShard.srcSharded", key: {"_id": 1}});
var db = st.getDB("mrShard");
var bulk = db.srcNonSharded.initializeUnorderedBulkOp();
for (j = 0; j < 100; j++) {
for (i = 0; i < 512; i++) {
bulk.insert({j: j, i: i});
}
}
assert.writeOK(bulk.execute());
function map() {
emit(this.i, 1);
}
function reduce(key, values) {
return Array.sum(values);
}
// non sharded src sharded dst
var suffix = "OutSharded";
out =
db.srcNonSharded.mapReduce(map, reduce, {out: {replace: "mrReplace" + suffix, sharded: true}});
verifyOutput(out);
out = db.srcNonSharded.mapReduce(map, reduce, {out: {merge: "mrMerge" + suffix, sharded: true}});
verifyOutput(out);
out = db.srcNonSharded.mapReduce(map, reduce, {out: {reduce: "mrReduce" + suffix, sharded: true}});
verifyOutput(out);
out = db.srcNonSharded.mapReduce(map, reduce, {out: {inline: 1}});
verifyOutput(out);
assert(out.results != 'undefined', "no results for inline");
out = db.srcNonSharded.mapReduce(
map, reduce, {out: {replace: "mrReplace" + suffix, db: "mrShardOtherDB", sharded: true}});
verifyOutput(out);
out = db.runCommand({
mapReduce: "srcNonSharded", // use new name mapReduce rather than mapreduce
map: map,
reduce: reduce,
out: "mrBasic" + "srcNonSharded",
});
verifyOutput(out);
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