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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.srcSharded.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) }
// sharded src sharded dst
var suffix = "InShardedOutSharded";
var out = db.srcSharded.mapReduce(map, reduce, { out: { replace: "mrReplace" + suffix, sharded: true } });
verifyOutput(out);
out = db.srcSharded.mapReduce(map, reduce, { out: { merge: "mrMerge" + suffix, sharded: true } });
verifyOutput(out);
out = db.srcSharded.mapReduce(map, reduce, { out: { reduce: "mrReduce" + suffix, sharded: true } });
verifyOutput(out);
out = db.srcSharded.mapReduce(map, reduce, { out: { inline: 1 }});
verifyOutput(out);
assert(out.results != 'undefined', "no results for inline");
out = db.srcSharded.mapReduce(map, reduce, { out: { replace: "mrReplace" + suffix, db: "mrShardOtherDB", sharded: true } });
verifyOutput(out);
out = db.runCommand({
mapReduce: "srcSharded", // use new name mapReduce rather than mapreduce
map: map,
reduce: reduce,
out: "mrBasic" + "srcSharded",
});
verifyOutput(out);
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